Repair and replacement of the resonator on a VAZ 2107: do it yourself

Main elements of the exhaust system

The design of the exhaust system becomes more complex, but with each new car model it includes all the same elements.

Collector

The exhaust pipe is an intermediate link between the car engine and the converter (catalyst). The collector is responsible for the removal of gases. Since in this case there is a very strong mechanical and temperature load, which can reach up to 1000 degrees, quite strict requirements are imposed on this part of the muffler. Therefore, in the manufacture of the intake pipe, only the best alloys of cast iron and steel are used.

Also, a vibration compensator (corrugation) is sometimes installed on this part, thanks to which engine vibration is damped and does not pass further through the exhaust system.

Neutralizer

The catalytic converter (or catalyst) “afterburns” unburned fuel residues and processes carbon monoxide. This element of the exhaust system is a special chamber or tank in which a ceramic or metal element in the form of a honeycomb is located. Thanks to these honeycombs, gas mixtures are purified through chemical reactions.

Now manufacturers have begun to produce multi-section neutralizers that meet all international standards, which process a wider range of harmful substances.

Front muffler (resonator)

The resonator is, in fact, one of those parts that are commonly called mufflers. This element performs the function of reducing noise, but not cleaning exhaust gases. When gases pass through the resonator, a lot of noise is created. Therefore, the internal “filling” of the front muffler consists of numerous grilles and holes that reduce the speed of escaping gases, as well as vibration. By and large, a resonator is a tank with a perforated pipe.

Front mufflers are:

• Active. Such mufflers are made of special sound-absorbing materials, and their design is simple.
• Reactive. Silencers of this type use combinations of expansion and resonator chambers.

Do not confuse the resonator with the rear muffler, as their design is very different.

Rear muffler

When we say “muffler,” we most often mean the rear part of the exhaust system. This element provides the final absorption of noise and also carries out the final removal of gases.

Unlike the resonator, the internal “filling” of the rear muffler is heterogeneous. Several chambers with special fillers are installed inside it. Thanks to the porous structure, the system of partitions and air ducts, it is possible not only to get rid of strong noise, but to reduce the temperature in the system.

Speaking of noise reduction, we cannot ignore another type of system that reduces excessive noise in the exhaust pipe.

A cross-section of a car muffler operating on the principle of noise absorption is shown in the diagram.

As in the resonator, partitions and jumpers in the form of tubes are installed here. Only in the latter are many holes of different diameters (perforation) made, and non-flammable absorbing material is laid on the sides. As a rule, basalt or kaolin wool is used for these purposes, which can easily withstand gas temperatures of 600–700 °C.

Sound waves, passing through adjacent pipes with holes, are partially scattered and damped by overlapping each other. The second part of the vibrations is absorbed by the filler, and the third is smoothed out due to partitions and a change in the direction of flow.

Where is it located and how does it work?

The muffler is installed on the underbody of the vehicle at the end of the exhaust system.

As a rule, a resonator is installed in front of it, closer to the engine, which reduces low-frequency vibrations and plays the role of an additional component in the exhaust system.

Despite the seemingly small size of the device, the sound wave travels through it for several kilometers. This is achieved by the presence of labyrinths inside the muffler, which attenuate sound waves.

The further a wave travels, the more energy it loses and the smaller the sound becomes.

To understand what a muffler consists of, you need to understand what types of devices there are and how they differ from each other.

Choosing a resonator for VAZ 2107

Four types of resonators are installed on the VAZ 2107:

1. Long section with one tank. Installed on all classic carburetor VAZ 2101-2107 with an engine capacity of no more than 1.3 liters. Catalog number - 2101–1202005.

The last two types of resonators are shortened due to the addition of an additional element - a catalytic converter. Parts for Euro 2 and 3 differ in length (spare parts for Euro 3 are shorter) and the number of mounting bolts on the flange. The second tank is missing - its functions are performed by the catalyst.

The choice of resonator depends on the specific modification of the VAZ 2107. When purchasing, you need to keep in mind the following recommendations:

1. On the carburetor version with a 1.3 liter engine, you can easily install a long section with one (VAZ 2101-07) or two (VAZ 2106-07) tanks. In the second case, the sound of the running engine will become quieter, but the power will drop by about 3-5 hp. With. Shortened resonators will not work.
2. Both long resonators are suitable for carburetor and injection VAZ 2107, corresponding to Euro 0. When installing a part with one tank, the exhaust noise will increase and the engine power will increase slightly. Short pipes cannot be installed.
3. The exhaust system for Euro 2 is equipped not only with a catalyst, but also with an oxygen sensor (lambda probe) mounted in the exhaust pipe. For such cars, the original shortened resonator with a two-bolt flange or any long section is suitable. However, such a resonator is not suitable for the VAZ 2107 Euro - it is connected to another catalyst and differs in length.
4. The exhaust system of the VAZ 2107, manufactured in accordance with Euro 3 standards, has two oxygen sensors. On the VAZ 21074 you can install the original short resonator or a long one, but with some modifications.

Once it was possible to modernize a 1.3 liter engine by increasing the displacement to 1.7 liters by replacing the crankshaft and boring the cylinders to size 82 mm. After which it was necessary to replace the “native” resonator with one barrel, because with an increase in engine power, the exhaust pipe began to roar more strongly, especially at speeds above 2500 rpm.

It makes no sense to install a resonator from other brands of cars and front-wheel drive VAZ models on the “seven”. You will have to strongly heat and bend a pipe made of refractory steel. An alternative option is to weld the resonator tank with your own hands based on the burnt-out element.

Installing long sections on the VAZ 2101-07 that comply with Euro 2 and 3 standards is advisable in cases where it is necessary to discard a failed catalyst. The latter is quite expensive, and not every car owner is ready to make a full replacement. In this case, after installing a long resonator pipe, you will have to install a snag instead of the second lambda probe or reprogram (reflash) the engine control controller.

Some breakdowns

The exhaust system of the VAZ 2107, the price of which can be impressive, does not always provide for the need to contact a car service if a breakdown occurs with it. There are malfunctions of the muffler itself, the exhaust manifold, corrugations, and neutralizer. The muffler most often fails due to low-quality gasoline and mechanical failures. On average, this unit lasts about three years. Here we can advise you to refuel only at proven gas stations, and be careful when driving over obstacles in nature. When replacing, buy a quality product.

A VAZ 2107 exhaust system diagram may be needed if you intend to make repairs. Many questions arise when the neutralizer fails. The replacement just costs a pretty penny. Many car owners simply throw it away. Even then, some work needs to be done. There is a way out of this situation. In place of the standard neutralizer, you can install parts from another manufacturer. They are much cheaper and have good quality. The main thing is to first find out what reviews there are about this part. This is not a problem when purchasing. Both the seller and other buyers will advise.

The exhaust system of the VAZ 2114, the price of which is 500 rubles, may require the installation of a flame arrester. One feature must be taken into account here. Not every flash arrester will fit your vehicle. You will have to look for one that is suitable for your brand. The metal catalyst is mostly praised. According to reviews, such failures are much less common.

Resonator

Resonator - a part of the exhaust system that dampens sound vibrations after gases exit the combustion chamber

The main task of the resonator is to dampen the sound vibrations of roaring exhaust gases escaping from the combustion chamber. The size, shape and design of the resonator directly affect how loud the engine will be. If this part breaks, the operation of the entire exhaust system is disrupted. The car becomes noisy and the smell of exhaust enters the cabin.

The history of the appearance of the resonator in the exhaust system

The first resonator appeared on a car at the beginning of the 20th century. Reducing the noise level was the first task that the developers had to solve, since soon after the appearance of production cars, pedestrians became dissatisfied with their excessively noisy work. This part began the creation of a complete exhaust system, which can be seen in modern cars.

Operating principle of the resonator

Exhaust gases are generated in the combustion chamber and are discharged from the cylinder through the exhaust valve. After this, they move at high speed along the exhaust manifold and exhaust pipe. In this case, the temperature of the gas mixture is about 650 degrees Celsius, so the parts of the exhaust system are subject to serious thermal stress.

The most difficult thing to create is a resonator design for a sports car. On the one hand, it must allow a flow of gases to pass through it without creating obstacles. On the other hand, reduce the noise level

Next, the gas flow enters the catalyst, and then into the resonator, which is a cavity with one or more chambers. A pipe with small holes passes through the chambers, through which a divided flow of gases passes. Passage through the pipe promotes mutual absorption of sound waves.

Types of resonators

More complex modern resonators may have a shell with thermal insulating material between the layers. Such parts not only absorb noise, but also protect the body from heating.

Increasingly, in the automotive industry there are combined resonators that consist of two parts. The first part of the part is based on the classic design with a pipe and internal bulkheads, and the second is filled with noise-absorbing material (usually basalt fiber). Such combined resonators work more efficiently than conventional ones.

Resonator operation and problems

The resonator with a double casing lasts the longest. The material must be resistant to corrosion. Typically, inexpensive mufflers for consumer vehicles are made from aluminized steel, which is regular steel coated with a thin layer of aluminum to protect the surface from corrosion. The volume of the resonator also plays an important role. The effectiveness of its work depends on this indicator. If the volume is not enough, then when you press the gas pedal sharply, the noise will increase significantly, and the part itself may begin to vibrate.

When buying a resonator made of aluminized steel, you should remember that the low price of the product is obtained by reducing durability. The best resonators are made from stainless steel

Like any part of the exhaust system, the resonator is exposed to the harmful effects of aggressive factors: operation in a gas environment, high temperatures. Because of this, the service life of exhaust system parts is very short. Signs of a breakdown may include increased noise, the smell of exhaust gases in the car, or the presence of wisps of smoke under the bottom. In this case, it should be changed.

Resonator in motorsport

Due to its simplicity and low weight, the resonator is used in motor sports, but for these purposes the part often undergoes significant changes. As a rule, sports cars are equipped with resonators that have a more complex type of chamber that provides sound absorption and has minimal resistance, that is, it does not increase back pressure in the exhaust system. Sports mufflers are usually made from stainless steel, since it has a smoother surface (creating a minimum of turbulence in the system), and parts made from it work better in extreme temperature conditions.

Signs of muffler failure

The first thing the driver will notice is:

1. Increased engine noise and unstable operation;
2. Reduced engine power;
3. Soot from the exhaust pipe;
4. The appearance of ringing sounds under the car;
5. Increased fuel consumption;
6. The appearance of foreign odors in the cabin;
7. Frequent headaches for the driver and passengers, which, with short-term exposure, can be caused by carbon monoxide. Prolonged exposure to the gas can lead to death.

Inspect the muffler for rusty holes, grab it with your hand and shake it to the sides; if the partitions or perforated pipes are burnt out, they will rattle.

Read here what to do if the muffler burns out.

Try to immediately seal any rusty holes that appear; there are many ways, but it is advisable to immediately replace the product with a new one.

Location of the VAZ 2107 resonator

The exhaust system of carburetor VAZ 2107 consists of three sections:

• double exhaust pipe connected to the exhaust manifold flange;
• resonator;
• main muffler.

A similar system was installed on the first seven with an injector that complied with Euro 0 standards. Later, injection modifications of the VAZ 2107 appeared, produced in accordance with the requirements of Euro 2 and Euro 3, in which the exhaust tract was supplemented with a fourth section - a catalytic converter located between the exhaust and resonator pipes .

The resonator, connected at the front to the exhaust pipe or catalyst, starts under the gearbox and ends in front of the rear axle beam. The resonator tank is located to the right (in the direction of travel) of the propeller shaft. The connecting pipe coming out of the body is bent upward and docked with the main muffler pipe that goes around the rear axle. The entire structure is supported by the engine exhaust manifold flange, a metal bracket and rubber hangers attached to the bottom of the car.

Alternative options for modifying the unit

If there are no problems with the exhaust system, then tuning can be done. The second tuning option, on the contrary, brings considerable benefits to the exhaust system. All parts from the exhaust manifold to the muffler are rigidly connected. When moving, vibration occurs, and therefore cracks and breaks occur. What can be done in this case? There is only one way out - installing corrugations. Then the entire structure is divided into two independent parts. Vibration will no longer have an effect. Frequent visits to a car service are eliminated.

To install the corrugation, you will have to contact the craftsmen. This work requires tools that the average car owner will not have in his garage. The VAZ exhaust system, the price of which should interest you before purchasing, can not only be repaired by the car enthusiast himself, but also tuned.

Muffler VAZ 2106

Today, mufflers for the “six” can be purchased in two versions: stamped and welded.

The stamp-welded muffler can be considered a classic option, since these are the models that were installed on all old cars. The essence of such a muffler is in its production: the two halves of the body are welded together, then a pipe is welded to the body. The technology is very simple, so the device is inexpensive. However, it is precisely because of the presence of welded seams that the stamped-welded “glushak” will last at most 5–6 years, since the seams will quickly corrode corrosion.

Products made using traditional technology are affordable

A sunset muffler is more durable and can last up to 8–10 years. Its production technology is more complex: a sheet of metal is wrapped around the inside of the muffler. Technology makes production more expensive.

Modern rolling technology allows us to produce high-quality and durable mufflers

Which muffler to put on the “six”

Choosing a muffler is not an easy matter. In auto stores and on the automobile market, sellers will offer a variety of models of mufflers, and at quite attractive prices:

• muffler IZH from 765 RUR;
• muffler NEX from 660 RUR;
• AvtoVAZ muffler (original) from 1700 RUR;
• muffler Elite with nozzles (chrome) from 1300 rubles;
• muffler Termokor NEX from 750 rub.

Of course, it is best to spend money on an original AvtoVAZ muffler, although it is 2–3 times more expensive than other models. However, it will serve many times longer, so the driver can decide for himself: buy an expensive one for a long time, or buy a cheap muffler, but change it every 3 years.

Original mufflers are preferable for the VAZ 2106, as they last longer and do not provide the driver with additional problems associated with maintenance

What materials are they made from?

Silencers of all types can be made from:

1. Of stainless steel;
2. Aluminized (alloy of aluminum and steel);
3. Regular black steel.

A stainless steel product can last, during active vehicle use, from 6 to 10 years, as it is least susceptible to corrosion.

They are sold on the market in a high price range, their big advantage is that despite the high price, they are mass produced and can be matched to most car brands.

Products made from aluminized steel are sold in the middle price range, they are also quite durable, but they are difficult to match to a specific car brand, since the choice on the market is not large (only a few companies produce them).

It is problematic to make such a muffler in a garage. The main advantage is a long service life of up to 6 years, and are less susceptible to corrosion.

Products made of black steel are mass produced because they are the cheapest. They can be made in a garage for any brand of car, but they will serve for 3, maximum 5 years, then the aggressive environment and rust will do their dirty work.

Lada 2107, 241 thousand without capital › Logbook › Replacing the VAZ-2107i injector resonator

Hello everyone, back in the winter on New Year’s Eve the resonator burned out, it was 4 years old, it was inherited from the previous owner, I changed the main muffler about a year and a half ago. I decided to wrap it with asbestos cord until spring, but after a month it burned out, so I wound it again.

Recently it became warmer, and the whipping started again - I decided to replace it.

I bought a resonator made in Tolyatti in advance; the main muffler was from the Seversky Pipe Plant, near St. Petersburg.

It turns out that there are 2 types of injector: Euro-2 and Euro-3. It differs in the bend of the flange and, it seems, in length. Before purchasing, I had to look under the car to make sure I have Euro-2, so the pipe with the flange has a bend, while for Euro-3 it is straight.

For some reason I bought a metal-graphite ring with bolts, which is used to connect the exhaust pipe and the catalyst, in my case they are not needed - the resonator with the catalytic converter has a rigid flange connection. But I think sooner or later they will also come in handy.

I prepared the tools, lubricant and sealant, there was an extra clamp left over from the last time.

With sin, I unscrewed two stuck bolts from the flanges; the clamp on the muffler came off easily, since it lubricated the threads even when replacing the muffler. During removal, the resonator flange completely came off - it was already held on by snot.

I had to unhook the muffler to disconnect the pipelines; the fastening belt broke, but fortunately I have a spare repair kit, also from last time.

The catalyst honeycomb is visible.

Just for fun, I decided to measure the thickness of the metal pipe of the new resonator - it is about 1.5 mm.

It looks well made, the seams are from an automatic machine, for some reason the article number comes from the “six”, although it seems that no injectors were installed on them.

Before reassembling, I lubricated the joints with a thin layer of graphite paste.

During installation, a problem immediately arose - the bend of the muffler began to rest against the bottom of the car - this is the geometry.

I tried this way and that, but still something stuck somewhere - either in the handbrake cable bracket, then in the cable itself, or in the shock absorber.

There was no autogen, to heat it up and bend it, I had to cut off a couple of centimeters from the tip of the resonator pipe with a grinder.

Somehow we managed to move it a couple of centimeters away from the bottom. Before the final tightening, I also lubricated all the bolts with copper grease, and on top of that with graphite grease, and installed new engravers.

I also lubricated the wire securing the muffler belt with pushsal, since everything there also rusts and you have to tear the belt with a mounting tool or saw it.

Upon inspection, it turned out that siphonage was coming from the new resonator at the place where the 2 halves were welded from a small hole of half a millimeter. It was discovered by the condensate coming out - such is the quality of production, they don’t even check the tightness of the seams.

I didn’t have time to drip it with electric welding or cover it with epoxy, I’ll fix it next time.

Subscribe! Good luck on the roads!

Price: 730 ₽ Mileage: 226,000 km

Basic moments

To replace the VAZ 2107 muffler as quickly as possible, you will need screwdrivers, a set of keys and sockets, as well as an inspection hole. If there is none, then you can raise the entire rear of the car as much as possible so that it is convenient to work under it. The main muffler is located at the rear of the car. Its edge is visible when looking at the car from behind. This element must be replaced either in case of severe deformation, as a result of which the ability to pass exhaust gases is greatly deteriorated, or if it is completely burned out, due to which exhaust gases escape from the muffler without being cleaned and noise reduced. Even if there are breakdowns or burnouts, the noise level increases many times. In this case, it is necessary to replace this element.

VAZ 2114/2115

There are no innovations in the VAZ 2114/2115 mufflers, the same 4 chambers and three partitions, three perforated pipes and one outlet pipe with an increased diameter.

As a rule, the metal of the outlet pipe rots, and that’s where the rattling noise comes from.

Next, let's look at the muffler design using the UAZ Patriot as an example.

First comes the upper housing casing, under which there is a layer of fiberglass.

Inside there are three chambers, separated by two partitions, two perforated pipes without narrowed sections. There are no vibration-absorbing materials.

The inner diameter of the outlet pipe is 52 mm, the inlet pipe is 53 mm. The outer diameter of the inlet pipe is 57 mm, the outlet pipe is 55 mm. Body length 50 cm.

The UAZ Patriot muffler is no longer distinguished by anything special. It makes a lot of noise and rusts inside.

How are knocking and muffler position related?

If the muffler suddenly starts knocking on some parts of the car, find the source of the extraneous sounds. Usually the reason lies in stretched rubber fasteners. After replacing them, the knocking will stop.

Sometimes a knock appears after work related to removing the muffler. In this case, extraneous sounds are a consequence of installation errors. Round pipes at the joints with clamps can be slightly rotated relative to the correct position: more or less than required, pushed into each other.

To eliminate knocking, restore the optimal position of the exhaust system elements.

Sagging mufflers can be “treated” using similar methods—by replacing rubber bands and correcting the position of joints.

Exhaust system design of VAZ 2107

Like most passenger cars, the VAZ 2107 has an exhaust system consisting of three main parts:

1. a receiving pipe into which gases enter from the exhaust manifolds;
2. VAZ 2107 resonator (additional muffler), where gases are directed from the exhaust pipe and where the exhaust sound is partially reduced;
3. muffler, which absorbs most of the engine exhaust noise.

In addition to the above parts, the exhaust system includes:

• muffler mounting pad;
• pillow bolt;
• muffler suspension belt;
• clamp bolt and clamp securing the muffler to the resonator;
• clamp bolt and clamp securing the resonator to the exhaust pipe;
• clamp bolt and clamp securing the exhaust pipe to the body;
• nuts securing the exhaust pipe to the manifold;
• pad;
• locking plate;

What is a muffler for?

Naturally, making the car sound quieter. Physically, the combustion of a mixture of air and gasoline produces vibrations of different frequencies, from low to high. The sound from the exhaust manifold carries all the energy of sound vibrations into the muffler, which is equipped with several special chambers. Like any wave, the sound from a motor has energy, or amplitude. The higher it is, the noisier the motor is. When it enters the chambers, the sound “gets entangled” and gives up its energy, turning into heat. This is why the muffler parts are so hot, although they are far from the engine, and the exhaust itself from the exhaust pipe is slightly warm. So, the first function is to make the engine quieter.

The second important function is the removal of combustion products, otherwise the mixture will not ignite in the zone of high carbon dioxide content.

The third function is keeping the cylinders clean and ventilating them.

It must be remembered that the exhaust system takes on very large thermal and chemical loads, and parts can “burn out”, since toxic exhaust gases, mixing with condensate, form complex acids, which are very aggressive at high temperatures.

On the outside, moisture, impacts from gravel, salt in winter and other causes also contribute to wear. Those who use their car in winter need to replace the muffler much more often.

What is the design of the VAZ 2107 muffler

The muffler is only part of the exhaust system. Its structure is as follows:

• Exhaust gases penetrate through the exhaust manifold into the so-called “pants” 12, which are called the exhaust pipe. The “pants” are separated from the exhaust manifold by a special gasket 11, which is designed to seal their fastening.
• The pipe is attached to the gearbox using bracket 15.
• Then there is a series of additional resonators, or mufflers, front and rear, which are attached using clamps 7 to the “pants” and 6 to the main muffler. These mufflers cut off certain sounds from high engine frequencies. Together they are called "additional muffler" 13.
• The main muffler (main) 3 is movably fixed to the bottom so that its frequency is not transmitted to the body. This mount can additionally dampen vibrations due to the “sway” of the muffler itself. It is produced using parts 1-4.
• Next comes the exhaust pipe.

Here it should be said that by the color of the exhaust and the condition of the pipe, one can draw certain conclusions about the operation of the engine, just as doctors draw conclusions about the work of the intestines by analyzing stool. For example, if you run your finger inside the pipe and a greasy, oily residue remains, then the oil scraper rings have become unusable and the engine “eats” oil, which is indicated by the black color of the exhaust. Normally, the inside surface of the exhaust pipe is dry.

The exhaust system assembly is shown below:

The main muffler contains numerous chambers consisting of perforated pipes.

The figure also shows the main muffler mounting and extension pad

An important feature of the VAZ 2107 muffler is its complete “interchangeability” with the rest of the classics. If you purchase parts from a VAZ 2101, or any other modification, you can’t go wrong

If your muffler needs replacement, it is better to do this at a service center, and purchase spare parts there so that there is a guarantee for the installation. Simply replacing a muffler is a messy business, especially if you have to start from the “pants.” It is possible that you will need to cut off the stuck joints with a grinder.

A few words about sports modifications of the VAZ 2107 muffler

A conventional muffler is indirect, this increases the pressure in the exhaust manifold and can reduce engine power. At that time, a direct-flow, sports muffler filled with ceramic fiber is able to increase engine power by faster cleaning of the cylinders from exhaust gases. It should be said that the sports muffler of the direct-flow system will never “scream”, and the engine operating volume will be quite acceptable.

Content

Hide

What's in the exhaust system?

Let's take a closer look at the main parts of the exhaust system. Downpipe

Resonator device

Muffler device

Malfunctions and repairs of the VAZ-2107 muffler If the muffler knocks

If the muffler is burnt out

Selection and modification of the muffler Muffler options for the “seven”

A stock muffler should be purchased from a trusted manufacturer.

Muffler modification

Sports muffler

Homemade muffler

Muffler

The exhaust system of a car has a special function - to remove waste gases from the engine. As you know, fuel after combustion leaves gases that must be completely released. The faster and better this process takes place, the higher the efficiency of the power unit. The gases first move in the direction of the exhaust pipe of the VAZ-2107 exhaust system, and then exit through the muffler. A hermetic seal is placed between the exhaust manifold of the internal combustion engine and the exhaust pipe, which prevents leakage of exhaust gas under the hood of the car. In some cases, instead of a gasket, corrugation is used to reduce vibrations. However, installing it is already a matter of tuning, adjusting all other elements of the system to the required parameters.

What's in the exhaust system?

The exhaust of the “seven” consists of several main parts: the exhaust manifold, the exhaust pipe, the resonator and the muffler. In addition, there are additional elements: rubber fasteners, flanges, seals.

The VAZ-2107 exhaust system includes the following elements: 1. exhaust manifold gasket; 2. exhaust pipe (pants); 3. bracket for fastening to the gearbox; 4. clamps for connecting pipes; 5. front resonator (first additional muffler); 6. rear resonator (second additional muffler); 7. main muffler; 8. Rubber suspension mount or cushion.

Exhaust system VAZ-classic

Let's take a closer look at the main parts of the exhaust system.

Exhaust manifold , made of good quality metal (sometimes replaced by tuners with steel.) This part of the exhaust system with the function of collecting exhaust gases. It is a unit of several cylinders or tubes. It is made on VAZ-2107 from cast iron. One side is attached to the exhaust pipe, the other to the engine. During operation of the machine, the exhaust manifold is subjected to heavy loads, since due to its design features it operates in extreme conditions. Gases tend to heat up to a temperature of a thousand degrees, and after stopping the engine, they cool sharply, which inevitably leads to the formation of condensation. Corrosion appears on the collector. Thus, the exhaust manifold is responsible for: • removing exhaust gases from the engine chambers; • for filling and purging the chambers.

The operation of the exhaust manifold is inextricably linked with resonance. During the operation of the engine - the combustion of the fuel-air mixture - strong pressure is generated, which is used to circulate gases. The pressure or pressure wave flows back into the cylinders, thereby helping the next portion of gases escape. The higher the engine speed, the more pressure is created and the faster the exhaust gases escape.

Downpipe

“Pants” - this name was given to this part for the characteristic shape of the exhaust pipe receiving gases coming from the engine exhaust manifold. The exhaust pipe is also an integral part of the exhaust system. It is located after the exhaust manifold, in front of the resonator. Made from durable metal, tuned models include corrugated parts. The receiving pipe of injection machines is different.

The exhaust pipe of the exhaust system is “pants”, this one is for carburetor cars

The “pants” on the VAZ-2107 quite often fail. This occurs mainly due to environmental influences. The same condensate formed as a result of temperature fluctuations negatively affects the metal components of the pipe. In addition, in winter in Russia, roads are sprinkled with compounds containing salts and various chemicals. They also have a bad effect on the exhaust pipe body. On the VAZ-2107, trousers are made from ferrous metal at the factory. However, you can independently replace the model with modernized analogues.

-The best choice is a receiving pipe made of stainless steel. It is, however, expensive. But there are a lot of advantages: resistance to corrosion and long service life. -Aluminized version of the pants. It is made of ordinary steel, but coated with aluminum. The service life of such products is more than five years (a standard pipe can burn out after two years). Additionally, they can be equipped with corrugated spacers.

The intake pipe for the injection VAZ-2107 has differences

Resonator device

A resonator or additional noise-absorbing element between the exhaust pipe and the muffler - in it the noise encounters its first obstacle. For the VAZ-2107 injection engine, it must comply with Euro-3 standards and have a built-in catalytic converter.

Resonators for injection VAZ-2107: the upper one with a catalyst, and the lower one with a “blende” instead of it

The resonator is the middle part of the exhaust system, which is a cylinder-shaped iron container. Its main task is to reduce exhaust noise at the preliminary stage. 40 mm connecting pipes are hermetically welded to it: • the front one is equipped with a return flange for pants; • rear pipe - has two places for connecting to the muffler. The resonator pipes of carburetor “sevens” can be equipped with one or two tanks. This depends on the engine modification: 1 tank is installed on 1.3-liter versions, 2 tanks on versions with 1.5 and 1.6 liter engines.

The VAZ-2107 resonator consists of several parts. 1. Cylinder housing. It is hermetically sealed. 2. Inner tube. It includes many perforations for the passage of exhaust gases. 3. Transverse septum. Used as a separator for resonator chambers. In essence, the resonator performs many useful functions, although it is considered an additional exhaust element.

Let's take a closer look at what it does. 1. Reduces the noise level of exhaust gases at the stage of entry into the muffler. 2. Does not create any resistance to exhaust energy. 3. Cools the hot gas coming from the engine. 4. Accepts part of the load that would go to the main muffler, thereby extending the life of the latter. The resonator on the injection VAZ-2107 of the latest years of production (compliance with Euro 2/3 standards) is supplemented with a catalyst. This is a special neutralizer installed between the pants and the resonator pipe. Such a resonator has a flange connection with the exhaust pipe, a different bend and is not suitable for carburetor “sevens”. During operation, it heats up to high temperatures, which is why it was taken down from the body and a heat shield was installed. Several versions of resonators can be installed on the VAZ-2107. Large resonators were installed on the old classic “sevens” with a carburetor.

Resonator for carburetor VAZ-2107

Muffler device

Silencer that absorbs most of the sounds. A regular stock VAZ-2107 muffler must be of high quality in order to effectively reduce noise. The last, outlet part of the exhaust system. The main function is to reduce noise by influencing sound vibrations. The muffler is equipped with special cameras that “catch” sounds of different frequencies. Getting inside such chambers, the sound gives up its energy, as if entangled in a labyrinth, and turns into heat. This is why the muffler parts are so hot when the car is running. But the functions of the muffler are not limited to this. It can be called the “last resort” of the exhaust system, because it is here that the exhaust gases find an outlet, and the engine cylinders are ventilated and cleaned.

Read, it may come in handy: The most popular car

It is important to understand that the muffler takes on very high thermal and chemical loads, so it can burn out over time. Impacts from crushed stones from the road, salt, moisture and other reasons also contribute to wear of the part. The muffler is often changed by owners who use their “Seven” in the winter season.

The exhaust system of the "seven" is directly connected to the engine. Therefore, it is necessary to promptly check it and replace damaged parts.

Malfunctions and repairs of the VAZ-2107 muffler

Any car system, component or mechanism tends to fail over time. The exhaust system of the “seven” is no exception, forcing the owner to contact a service station or deal with it on his own. A pit and special tools are all that is required.

Common muffler malfunctions include knocking, sagging and partial or complete burnout of the housing. Experienced motorists judge problems with the muffler by the smoke coming from under the car and increased exhaust noise. There are several reasons for damage to the muffler: mechanical loads when the machine moves, exposure to chemical compounds, unstable pressure inside the pipes, and much more.

If the muffler is knocking

This sound begins, as a rule, as soon as the owner starts the “Seven”. A knock is heard from under the bottom and intensifies as speed is gained. Definitely, you will have to crawl under the car to find loose fasteners. Most likely, it is the resonator knocking on the body. However, more often the muffler itself makes sounds. The reason for the knocking is primarily related to the rubber fasteners. They stretch and don't hold the part properly. Sometimes it is enough to replace them so that the knocking stops.

Here's how it's done: • the back of the car is lifted onto a jack; • old, worn-out pillows snap off; • new parts are installed. There is another known way to get rid of muffler knocks. 1. Take a half-meter piece of copper wire, preferably bare, uninsulated, and fold it in half. 2. One end of the wire clings to the last hook of the clamp, which is near the muffler nozzle. 3. The second end of the wire clings to the body where it is most convenient. The main thing is to tighten the wire well with pliers and check the muffler with your hands. You need to shake it with your hands, if it doesn’t rattle anywhere, then there won’t be any knocking when the car is moving. The wire should be copper so that it does not rust over time. A good option is mounting with bolts and homemade brackets. One clamp is welded on the body, the other on the muffler itself. A plastic cushion is installed between them and secured with bolts.

If the muffler is stock, not homemade or sports, welding the lower bracket will be problematic. Therefore, it can be made in the form of a regular clamp. Often the sound appears after repairs involving the removal of the muffler. This occurs due to errors in the reverse installation of the part - the pipes at the joints with clamps are placed crookedly and are not moved correctly relative to each other. The solution is to set the optimal position of the elements.

The first time I had to deal with repairing a muffler after an accident. It was a minor collision, although being behind the wheel of a G7 that went sharply backwards down a hill, I didn’t think so. Here is how it was. I was towed by my friend. When there were a few meters left before the end of the climb, the cable broke and the car rolled sharply backwards. It was not possible to slow down in time - the car crashed with its back into a large stone on the side of the road. I somehow got to the garage and discovered that the muffler mount had broken. The flange had to be replaced with a new one; the welding would not hold. I found a friend in the garage, took it and replaced it with him in the pit - that's all.

If the muffler is burnt out

Most often, malfunctions occur with a welded muffler. It lasts less than new. Burnouts occur precisely at joints and welds. If it is not possible to buy a new muffler, you can restore the functionality of the element and use it temporarily. It would be a good idea to inspect the muffler gasket, which tends to burn out quickly. Muffler repair For high-quality muffler repair, you need to prepare the following set of tools. 1. Grinder with discs for cutting metal. 2. Welding machine. 3. Drill with metal drills

Selection and modification of the muffler

As mentioned above, the “seven” muffler deteriorates more often than other areas of the exhaust system. Owners are beginning to wonder what option to install so that its quality is at its best.

Muffler options for the "seven"

There are several options for mufflers: 1. The stock or standard muffler is the simplest. The stock muffler has its advantages - the factory engine settings are fully consistent with the standard exhaust system.

Original design muffler

This version of the muffler is also on sale and is cheaper

2. Homemade direct-flow muffler . Can be made from a used factory muffler or completely from scratch. 3. Nozzle option . A chrome-plated part that looks beautiful, but is of little functional use; its installation is not aimed at improving performance. 4. Sports muffler . It is sold in stores. Its installation involves reworking many exhaust elements - the resonator, pants, connectors. You will also have to replace some parts inside the power plant.

A stock muffler should be purchased from a trusted manufacturer.

It is better to immediately reject Chinese consumer goods. Here are some tips for choosing. 1. The thicker the steel on the muffler can, the longer the product will last. You won’t be able to check the thickness of the metal using the usual methods, but you can pay attention to the weight of the muffler—heavy ones are better. The recommended option is 1.5 mm steel.

Read, it may come in handy: Seats: repair and replacement of old chairs

2. The service life of the muffler depends on the quality of the welds on the tank and muffler connections. It is on them that burnouts often occur, forcing owners to buy new products. Therefore, the weld must be neat around the entire perimeter. 3. The quality of the anti-corrosion coating is an equally important condition. The best manufacturers of stock mufflers take care of this and coat the products with zinc or aluminum. This allows you to increase the life of the muffler several times. 4. Paint must be present on parts made of ordinary black steel. If it is not there, then the muffler will not be resistant to thermal influences and will quickly burn out. 5. The level of sound attenuation and the amount of back pressure of the muffler can be viewed on the packaging (if available). Otherwise, you can ask the sellers.

Muffler modification

Increased noise when driving, the smell of exhaust gases in the cabin, decreased engine thrust - all this can be eliminated once and for all. You just need to modify the described part of the exhaust system, because installing a new stock muffler will sooner or later lead to the same problems. There are 3 main types of modifications to the muffler on the VAZ-2107. 1. Installation of a sports muffler according to all the rules of tuning art. 2. Homemade muffler similar to a sports muffler. 3. Installation of nozzles on the stock muffler.

Sports muffler

A sports or direct-flow muffler has a special design designed to minimize the resistance of exhaust gases. Therefore, everything inside such a muffler is much simpler; there are no partitions, as in the stock version. Sound absorption is carried out by a pipe with holes and layers of mineral wool with soundproof properties. The absence of partitions does not hide the “growl” of the engine, but does not prevent the free exit of gases, which makes it much easier for the pistons to work.

One of the sports muffler options

Installing a sports muffler can give an increase in power to the VAZ-2107 engine. The amount of additional horsepower will depend on the work done correctly, the diameter of the pipes, and the design. So, in a sports muffler, designers use the physical properties of gases, which flow much better from a larger pipe into a smaller one, but subject to a cone-shaped pattern. The ideal sports exhaust system consists of pipes of different diameters to suit each speed range. Here, for example, are the technical characteristics of one sports muffler: • an inner layer of basalt wool, with a fire resistance of 1200 °C; • the outer diameter of the pipes is 140 mm, the inner diameter is 50 mm; • barrel length 480 mm; • wall thickness 1.5 mm. It is recommended to install mufflers with pipes with a diameter of 3–5 cm on a 1.6-liter engine. The “seven” engine is not volumetric, so that an exhaust system with a larger pipe diameter can be installed. It is also allowed to install 2 mufflers.

Homemade muffler

A forward flow can be made from an old stock muffler and a couple of additional elements. A direct-flow muffler is made with your own hands by analogy with the sports version. You do not need to have any specific skills, there is no need to buy expensive kits. Such a muffler is also capable of increasing the power of the internal combustion engine, although it will not be possible to achieve an increase in sports exhaust - only the main muffler and resonator are being modified. The sports exhaust uses a scheme of different pipe diameters, but here everything is much simpler.

Necessary materials for work. 1. 52mm pipe. 2. 50 pieces of “hedgehogs” - metal sponges for washing dishes.

Remaking a standard resonator is done as follows. 1. Remove the standard muffler and resonator. 2. Saw the resonator lengthwise, exposing the inside of the part. 3. Remove stiffening ribs and partitions from the resonator that interfere with the free passage of gases.

Tuning version of the exhaust manifold

Now the basic steps for making a direct flow. 1. Cut the 52 mm pipe to the size of the tubes cut from the resonator. 2. Make holes with a drill around the entire circumference. 3. Then weld this pipe to the flanges of the cut resonator tubes. 4. Stuff hedgehogs inside the sinuses. 5. Place the previously cut cover on the resonator and weld it. The weld must be smooth, without gaps, so as not to allow gases to pass through. 6. Cut off the end of the standard muffler and weld a double piece of half-meter pipe (52 mm in diameter) instead. 7. Apply heat-resistant paint to the surface of the pipe. 8. Install the muffler and resonator back onto the car.

Important details. 1. You can make cuts on the pipe for the resonator with a grinder, maintaining a step of 1–2 cm so that the pattern resembles a “herringbone”. Leave protrusions on each edge of 5–7 cm. 2. It would be better to wrap the workpiece with asbestos fabric and mineral wool, roll it up with tape on top for reliability, and then install it in the resonator.

When I was young, I wanted to change the exterior and functionality of my car. We have a good welder in our village, Uncle Kolya. I went to him and asked him to make me a “roaring” muffler, a forward flow one. I heard from someone that the engine will begin to produce more power after this. Uncle Kolya suggested a homemade version in a week. They agreed on hands for 5 thousand rubles. I went and looked every day. I didn’t notice anything particularly difficult in the work, only he cooked very carefully, and everything was neatly laid out in the garage, in its place. The result greatly saddened me - the engine did not receive any additional power, but every day I received flights from neighbors due to the strong rumbling of the car engine.

Muffler

Some owners like it when a low-frequency, sporty sound comes from the muffler. This can be achieved by welding a small piece of 130mm pipe to the end of the muffler. You can buy special nozzles of good quality. They are inexpensive, their length is slightly more than 10 cm, and their diameter is 45 mm. The metal is coated with high-quality anti-corrosion compounds and will last a long time.

The choice depends on individual preferences. There are models with different smells, whistles, double ones, with illumination, etc. In general, tuning the muffler using attachments is considered the most common, since it is easier to do. However, functionally changing something in this way will not work. The nozzles provide only a visual effect and change the character of the exhaust sound. Installing the muffler tip is easy. It is enough to tighten it with a clamp or weld it. In the latter case, it is recommended to cut off a little from the edge of the standard muffler and then weld the nozzle. You don’t have to cut it, but then the tuning element will stick out behind the car more than required.

Differences between the exhaust systems of carburetor and injection VAZ models

Installation of an injection system on a VAZ 2107 required modernization of the exhaust system. Two additional details were added to it:

• an oxygen sensor that determines the composition of the mixture, which is embedded in the exhaust manifold;
• an exhaust gas catalyst (“catalyst”), which is installed in front of the resonator, in the central tunnel under the bottom.

In connection with the installation of the catalyst, the VAZ 2107 resonator (injector) was moved a little back.

The new exhaust system has become a little more complicated, but it allows for a reduction in the toxicity of the VAZ 2107 exhaust and ensures that the car complies with EURO-2 standards.

Advantages and disadvantages of the injection modification of the VAZ 2107

The “Seven” in injection version and with a modernized exhaust system has a number of advantages over the old “carburetor” model. They are as follows:

• thanks to the injector, the engine operates more stable in all modes;
• the specific power and torque of the injection engine are higher;
• the exhaust of a VAZ 2107 with an injection system is cleaner than smoke from a carburetor engine;
• Driving a car with an injection engine is easier, it is not so demanding on the driver’s qualifications and “forgiven” mistakes when operating the gas and clutch pedals.

But installing the injector at the same time worsened some performance characteristics:

• the clearance of the injection “seven” decreased to 7 cm, which worsened its cross-country ability;
• due to the installation of the catalyst, the “survivability” of the exhaust system has decreased;
• the high temperature of the catalyst sometimes causes grass and dry leaves to ignite when the car is stopped.

Advice: to avoid fires, it is necessary to park the injection vehicle so that there is no grass or other flammable debris under it. When stopping, it is better to turn off the engine to allow the catalyst to cool down.

Threaded connection

The old spare part is still cut off with a grinder. In order to install a new part, you must do the following:

• On the rings and exhaust pipe, drill eight holes with a diameter of 4-6 mm around the circumference at the points of contact;
• Using an M5 tap, cut threads in the drilled holes;
• Treat all structural parts with sealant;
• Screw the bolts into the holes;
• Install corrugation.

The use of high-temperature sealant will ensure the reliability of the connection. After completing these steps, you will receive a fairly high-quality and sealed car exhaust system assembly.

Car engine noise - elimination principle

In addition to the engine, additional noise is created by tires when rubbing against the road, as well as wind flows affecting protruding structures and machine parts. But the operation of the engine creates the greatest noise effect, requiring urgent measures. And the first priority is to carry out insulation in the engine compartment.

This action, as a rule, is included in the general set of measures for the installation of complete sound insulation. However, work can only be carried out on a specific area. Insulation of the engine compartment is the most effective for the entire car and brings the noise level to the optimal level. In this case, the main task is to create a sealed coating when all surfaces of the engine compartment are treated from the inside.

In order to effectively remove car engine noise, it is necessary to adhere to a certain technology when applying materials such as vibration absorbers and, directly, sound insulation. First of all, the partition between the engine compartment and the passenger compartment is processed, as well as the inside of the hood.

Symptoms of a clogged muffler

The blockage indirectly affects all the main systems of the car - it reduces engine power, increases fuel consumption and changes dynamics. Therefore, this problem option should be considered if the machine shows signs of deterioration. Check whether the engine overheats after a short start, whether there is rust or heavy smoke outside.

When the muffler is clogged, the removal of exhaust gases produced during combustion of the fuel mixture is impaired; The natural result of this is a decrease in engine power. The problem is most often encountered by car owners whose exhaust system is equipped with a catalyst (catalytic converter), which reduces the amount of harmful emissions, but also often becomes clogged. Often, a plug occurs in the main or additional muffler, as well as in the pipes connecting them to each other, and the reason for this may be mechanical damage or destruction of internal parts.

Methods for checking for exhaust gas obstructions:

• Measure the outlet pressure.
• Determine the concentration of harmful impurities CO and CH (a measuring device is available in most car services).
• Check the pressure in the converter using an ordinary pressure gauge with a measuring limit of 0.5. The insufficient throughput of the catalyst is indicated by the maximum indicator of the device when pressing the gas pedal.
• Visually inspect the catalyst honeycombs against the light, having previously dismantled it.

Some recent cars have two oxygen sensors (Lambda Probe). In this case, you can check the effectiveness of the neutralizer based on the readings of the sensor located in the lower part (at the outlet). The electronic control unit will show an error if significant problems are detected.

Article: 2101-1203025, additional articles: 21010120302500

Order code: 001325

• You may need
• show more

• Passenger cars / VAZ / VAZ-21011 drawing

• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2101-3/truby_vypusknye_i_glushiteli-108/#part2603″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers

• Passenger cars / VAZ / VAZ-21031 drawing
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2103-106/truby_vypusknye_i_glushiteli-79/#part10776″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers
• Passenger cars / VAZ / VAZ-21052 drawings
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2105-6/truby_vypusknye_i_glushiteli-83/#part17323″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2105-6/truby_vypusknye_i_glushiteli-84/#part17345″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers
• Passenger cars / VAZ / VAZ-21073 drawings
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2107-8/truby_vypusknye_i_glushiteli-120/#part24417″>Bracket Exhaust gas system / Exhaust pipes and mufflers
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2107-8/truby_vypusknye_i_glushiteli-119/#part24386″>Bracket Exhaust gas system / Exhaust pipes and mufflers
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2107-8/truby_vypusknye_i_glushiteli-121/#part24445″>Bracket Exhaust gas system / Exhaust pipes and mufflers
• Passenger cars / VAZ / VAZ-21021 drawing
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2102-4/truby_vypusknye_i_glushiteli-108/#part7087″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers
• Passenger cars / VAZ / VAZ-21042 drawings
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2104-5/truby_vypusknye_i_glushiteli-83/#part14217″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2104-5/truby_vypusknye_i_glushiteli-84/#part14239″>Bracket Exhaust gas exhaust system / Exhaust pipes and mufflers
• Passenger cars / VAZ / VAZ-21061 drawing
• » href=»/catalog/vaz-3/legkovye_avtomobili-30/vaz_2106-7/truby_vypusknye_i_glushiteli-82/#part20247″>Bracket Exhaust gas system / Exhaust pipes and mufflers

There are no reviews for this product yet.

Today, the next article in the series “Crystal VAZs or typical breakdowns of domestic cars” is dedicated to the “classics”: VAZ-2101, 2103, 2104, 2104, 2105, 2106 and 2107. These cars have been driving along our roads for decades and, despite Despite all the shortcomings that we will talk about, their popularity is still high.

Suddenly, out of the blue, while driving your favorite “Seven” in complete comfort, an incomprehensible “roar” appears at the throttle. The driver turns off the radio and listens. After every press on the gas pedal, the car growls and roars like a tank. After climbing under the bottom, it is discovered that the VAZ 2107 muffler is completely unsoldered, the pipe has moved away from the resonator, and the fastening is broken. If the inside of the exhaust pipe is “jammed” and the removal of exhaust gases is impaired due to a decrease in diameter, then the engine “chokes” and a loss of power occurs.