All about the exhaust system of the VAZ 2115. design, breakdowns and repairs renoshka.ru

If you have problems with the exhaust system on a VAZ-2115, you must first study its diagram. The problem may be hidden in one of the parts of this unit. The exhaust system is designed to remove gases that the VAZ-2115 engine releases from the engine. After passing through the tubes and parts of the gas exhaust unit, the amount of carbon dioxide decreases. A small amount of exhaust gases is released into the atmosphere.

Exhaust system design

All parts of the gas exhaust system of the VAZ-2115 car can be easily disassembled, which allows you to replace them yourself, without the involvement of specialists. Main parts of the gas outlet unit:

Bracket mounting of the exhaust pipe.
A gasket located between the pipe and the intake manifold.
The clamping part of the bracket (represents a plate).
Pipe for receiving gases from the engine.
Metalgraphite gasket in the form of a ring.
Catalyst.
Rubber mounting pad.
First (additional) muffler.
Main muffler.
Rear mounting cushion.
Fastening clamp (often called brackets).

The location of most of the listed spare parts is under the bottom of the car, which makes them vulnerable to mechanical damage.

The cause may be not only external damage (most often caused by falling into holes or difficult to navigate places), but also exposure to chemical reagents or the influence of climatic conditions.

Gas exhaust system (muffler diagram)

For 1.5l engines

Reception pipe connection bracket.
Pad.
Bracket seal.
Secondary muffler. (Muffler resonator)
Muffler suspension cushions.
Main muffler.
Muffler pipe connection clamp.
Hinge O-ring.
Neutralizer.
Connecting ring.
Oxygen concentration sensor.

For 1.6l engines

The exhaust system on 1.6-liter engines is distinguished by the absence of a converter (a metal corrugation is installed instead) and the presence of a catalytic manifold (installed immediately after gasket number 3).

For information, the toxicity standard for VAZ 2114, 2113, 2115 is R 83.

How to notice a node malfunction

It is not difficult to determine that it is time to change parts of the exhaust system on a VAZ-2115 with an 8-valve engine. Even a novice car enthusiast can cope with this, since the main signs are the appearance of a strong smell of exhaust gases in the cabin and an increased noise level. Most often, faults are hidden in the additional or main muffler, as well as in the gaskets between the connections, which can burn out over time.

The classification of the most frequently occurring faults is as follows:

mechanical damage to the muffler;
burnout of gaskets;
corrugation burnout;
loosening of connections at joints;
cracks in the system pipes.

Problems can be spotted by visual inspection. Experienced specialists recommend removing gas exhaust units for these purposes. This way you can examine them from all sides and notice the slightest damage. After you conduct a visual inspection of the system, you need to buy spare parts and begin repairs. It's easy to do it yourself.

If there are no external problems, you can try replacing the internal resonator. This repair method will only help those who know how to handle welding equipment.

Small burns and holes can be covered with sealant. Just pay attention: it must easily withstand temperatures up to 1000 degrees. Before applying the composition, it is necessary to thoroughly clean and degrease the surfaces.

Muffler replacement

Using the example of replacing this component, we will show that it is not difficult to repair the exhaust system and dismantle its components. To work, you will need to install the car in the garage above a pit or drive it onto an overpass. Disassembling this node is not so difficult:

disconnect the main and additional muffler;
bend the hooks of the hanging straps;
remove the brackets;
remove the main muffler, which is mounted on the cushions.

After this, you will need to reassemble in the reverse order, only instead of the old spare part, hang the new one on the cushions. If the fastenings of the clamp connecting the resonator and the muffler pipe are dirty, clean them with a metal brush.

Before assembling the system, clean the gasket ring thoroughly. You can coat it with heat-resistant sealant to reliably seal the exhaust gases inside the system. The above method of replacing a muffler can also be used in cases where you want to tune your car.

Many car enthusiasts install sports mufflers on their VAZ-2115, which have a qualitatively different sound. In this case, you don’t have to wait for a malfunction to appear. Also, the new muffler can improve the environmental characteristics of the car, that is, after replacing this component, it will release less exhaust gases into the atmosphere. Remember that sport or upgraded mufflers will cost more than the stock replacement part.

If you want to tune your car, get ready to spend a lot of money. Buy only new imported spare parts. You should not try to turn an ordinary spare part into a sports modification using welding. This homemade product will not last long. For the same reason, we recommend replacing entire parts of the exhaust system rather than trying to repair them if malfunctions occur.

Replacement options

If you want to ensure a minimum of problems with the gas exhaust system in the future, look for stainless steel products similar to factory ones, since the exhaust pipe circuit has poor anti-corrosion protection. The shelf life of the structure will depend on the quality of materials, so stainless steel will be the most profitable purchase. To select suitable components, focus on the diameter of the old pipes.

For new steel components, do not forget to purchase an additional metal-graphite sealing ring, and also update the VAZ muffler. A rubber gasket under a stainless steel system is also useful.

Why does a sports exhaust system not make sense for the VAZ 2114? There is information that special pipes and mufflers that provide direct exhaust exit can increase engine performance by 10-15%. This effect can only be observed in cars whose engines have at least 200 hp. With. power. For the sports update to be profitable, the engine power will also need to be increased. So this type of tuning is suitable for those drivers who want their classic 2114 to become a car for racing or high-speed driving on the highway.

All about the exhaust system of the VAZ 2115. Design, breakdowns and repairs

Design features and modern exhaust system on the VAZ 2115. Perhaps the topic is not very relevant, but many drivers do not really know what it consists of and how it can be repaired in the event of a breakdown. Agree that speeding through the city with a wild exhaust from behind is not to the liking of many. The volume of sound from the muffler depends on how smoothly it works.

The main purpose of the system is to remove exhaust gases from the car engine through pipes and channels. Most often, malfunctions occur due to mechanical damage, due to wear or negative influence of weather. Let's look at what it consists of and what are the main ways to fix breakdowns below.

Common problems

The exhaust system of the VAZ 2115 and 2114 has one significant flaw - terrible anti-corrosion protection. Because of this, burnouts often form throughout the entire structure. This flaw has become a nightmare for inexperienced drivers. The moisture that accumulates inside the pipes destroys the metal, causing damage to the exhaust system. Another type of damage is ruptures of suspensions and channels.

This effect occurs when the catalyst fails and fuel droplets enter the system channels. When exposed to high temperatures, they ignite, which leads to fires and explosions inside the pipes.

Repairs after such damage are possible, but it makes no sense to “patch holes” by welding. Budget repair options will not work. You can replace individual parts of the assembly one by one, but this will bring little benefit. A complete redesign of the system and installation of new components will be required. But choosing the right parts is difficult. You can install pipes from a sports kit, but this will have almost no effect on the performance of the car. Therefore, the next task is to select a suitable set of pipes for upgrading the unit.

Malfunctions

Various mechanical damage;
Burnout of asbestos gasket;
Fatigue and wear of the metal and, as a result, burnout;
Defects at the joints;
Cracks.

Considering the above, first of all, the driver must determine the source of infection and work out a schematic way to eliminate it. Let's imagine that the muffler on your car has burned out.

, this is the most common phenomenon on many cars and the VAZ 2115 is no exception.

We must drive the car onto a viewing hole or a stationary overpass;
We turn off the engine, squeeze the handbrake, wedge the wheels with boots or put it in first gear, you can choose any option;
Let the exhaust system cool down a little, as it heats up under the influence of exhaust gases. You can easily burn your fingers. We always carry out all work wearing gloves.
After making sure that the pipes have cooled down, using capes we unscrew the connecting clamps between the muffler and the resonator, otherwise known as the secondary muffler.
From the rubber clamp-holder, remove the hook with which it secures the muffler to the bottom of the car;
There will be an O-ring between the connections, be careful not to damage or lose it. Carry out visual diagnostics and replace with a new one if necessary. As a rule, the negative impact affects a short service life;
Having removed the muffler, we put it aside so that it does not interfere with the process.
We pre-lubricate the new ring with heat-resistant sealant, in this way we extend the service life;
Install the system components in reverse order.
After installation, be sure to start the engine and test the system. Pay attention to ensure that there are no gas leaks, otherwise your work will be down the drain.
If everything is fine, you can continue on your way. If not, eliminate the shortcomings.

Schematically the exhaust system looks like this:

A flow of gases emerges from the combustion chamber through the exhaust manifold, exhaust pipe, neutralizer, resonator, and the muffler itself.

Burnout of the gasket can also be a weak point or “sore”

between the cylinder head and the exhaust manifold. Despite the tight pressure around the perimeter with the help of four stud bolts. The asbestos gasket still burns out, and the engine emits an unpleasant and loud sound.

Modern cars, including the VAZ 2115, use a neutralizer to significantly reduce emissions into the atmosphere, these are oxides of nitrogen, carbon, and hydrocarbons. Structurally, it consists of two parts with catalysts made of platinum and palladium. Passing through these plates, gases react, resulting in a low-toxic oxide, the harmfulness of which to the environment is minimal. According to experts, purification is about 85-95%.

Corrugation

This element is installed on many cars of both domestic and foreign production. VAZ-2115 is no exception. The corrugation performs the function of vibration damping. Since the combustion of the fuel-air mixture causes gases to rush out with enormous force, the exhaust sound would be very loud. The corrugation partially reduces the noise level of the exhaust gases. It is made of stainless steel. She is very flexible. Unlike the muffler and resonator, the corrugation does not rust. However, it is susceptible to mechanical damage. Since it is located under the bottom, it is often hit by asphalt. As a result, it becomes deformed and gases pass through it.

What is a car muffler for?

Regardless of the make and year of manufacture of the car, all its systems serve one purpose - to ensure stable operation of the engine and movement. The exhaust system may seem insignificant compared to systems such as the brakes or fuel. However, it is the vehicle's exhaust system that has the most direct impact on engine performance.

The muffler is an integral part of the exhaust system . Its main purpose is to remove exhaust gases outside the car. In addition, the part also serves to reduce noise, since residual fuel can burn in the exhaust system pipes.

The pipe comes out from the rear left side of the car

How to attach

The muffler on the VAZ 2114/2115 is attached to the car body. To ensure that the pipe is securely fixed and does not vibrate during movement, two fastening methods are used:

on rubber suspensions.

Bolts and nuts for fastening the muffler pipes are made of special heat-resistant alloys

The muffler is attached directly to the exhaust manifold with bolted connections, which guarantee complete tightness of the joints. The middle part is also fixed with bolts and nuts. And the resonator and exhaust pipe are suspended on special hooks on the bottom with elastic bands. These suspensions are easy to remove and put on, but at the same time provide rigidity even when driving on uneven roads.

Schematic design of the exhaust system on a VAZ 2114/2115

The gas exhaust system of the VAZ 2114/2115 consists of several parts. Connecting to each other in series, all parts ultimately serve one purpose - reducing noise and removing exhaust emissions outside the body.

1 — bracket for fastening the exhaust pipe; 2 - gasket; 3 — clamping device for the bracket; 4 — additional muffler; 5.7 — “pillows” for muffler suspension; 6 — main muffler; 8 — clamp connecting the muffler pipes; 9 - neutralizing device; 10 — hinge sealing ring; 11 - sensor that monitors the oxygen concentration in emissions; 12 — exhaust pipe for mufflers

System functions and properties

In addition to removing exhaust gases, the exhaust system of the VAZ 2114 weakens the impact of sound vibrations that the engine emits during operation. The engine creates a lot of noise, and only thanks to the exhaust pipes can it be muffled.

The design of the unit consists of the following main parts:

muffler for VAZ main;
secondary muffler pipe;
neutralizer (only in injection engine models);
collector pipe;
exhaust pipe;
corrugation;
resonator;

To maintain environmental standards, a catalytic converter was installed in engines with fuel injection through an injector - a device that helps reduce emissions into the atmosphere. The catalyst allows you to burn up to 95% of the fuel that enters the combustion chamber, thereby reducing the amount of combustion products and increasing engine productivity. Thanks to a set of sensors through the computer in the car, the neutralizer can regulate the amount of toxic substances in the exhaust gases. But at the moment this design is an outdated option and is practically not used in modern cars.

How to replace a muffler on a VAZ 2114/2115

If you start having any problems with the muffler, it is better not to put it off for a long time. The life and health of the driver and passengers depends on how correctly the “glushak” works. In general, the replacement process itself begins with the selection of a new exhaust system kit. It is best not to save money, but to purchase an original factory one. This will delay the need for repeated replacement indefinitely.

In addition, it is recommended to change the fastening bolts during each replacement. It is necessary to choose products made from heat-resistant materials, since otherwise the bolts will quickly stick to the bottom and will be impossible to unscrew.

To ensure reliable operation, it is advisable to buy new rubber suspensions in advance.

What tools will you need?

To work you will need a simple set of tools:

two open-end wrenches for 13;

brake fluid or WD-40 lubricant;

screwdriver with a flat thin blade.

How to remove a muffler without a hole

The easiest way is to use an overpass or inspection hole - in this case, you can more conveniently crawl under the car body and carry out the necessary operations. However, drivers often do not have the opportunity to use such devices, so they use a regular jack.

To remove the “glushak” from a VAZ 2114/2115, you must:

Jack up the rear left edge of the vehicle.

Make sure the machine is stable.

Reach under the body and moisten all pipe connections and bolts with lubricant.

Wait 10–15 minutes until the liquid is absorbed.

After which you can begin to unscrew the bolted connections. If the bolts cannot be unscrewed with regular wrenches, it is recommended to cut them off with a chisel and hammer. However, you need to act extremely carefully so as not to catch the bottom.

After the pipe has been unscrewed, all that remains is to remove the part from several rubber hangers. To do this, the body is raised slightly. If the rubber band is tight, you can pry it off with a screwdriver.

The dismantled muffler is pulled out from under the car.

The muffler on the VAZ 2114/2115 is attached to the bottom with five hangers

How to install a new one and secure it correctly

Before you begin installing a new muffler, you need to clean all strategically important places under the bottom: hooks for attaching rubber bands, brackets for bolts. Install the product in the reverse order:

First, pull the muffler under the car body and position it in the position in which it will be fixed.

After this, hang the exhaust pipe and resonator on rubber hangers. Make sure that each connection is secure and the part will not fall off the hooks at the first road pothole.

Next, start tightening the nuts on the bolts. Screw it all the way, but without fanaticism, as you can break the thread.

Lower the car from the jack.

After this, it is recommended to check the performance of the VAZ. It will be enough to start the engine and rev it up a little.

Video: replacing the muffler

Installation and dismantling

Before installation, we disassemble the old system:

Using a metal brush, we clean the 2 bolts that secure the clamp between the muffler and the resonator.
Lubricate the fastening nuts with WD-shkoy, machine oil or rust remover.
Take a 13mm wrench and tighten the nuts. If this does not work out, cut it with a grinder.
Next, remove the clamp itself and take out the sealing ring.
We disconnect the muffler from the resonator, dismantle the VAZ 2114 muffler itself.
We unscrew the fastenings of the remaining parts and remove them.
Assembly is carried out in reverse order. If you have not encountered such work before, it is better to take your car to a service center to replace the exhaust system.

The VAZ 2114 muffler can be replaced independently. Just repeat steps 1-5. The resonator is replaced after dismantling the muffler.

The exhaust system of the VAZ 2114 is a complete problem. The presence of serious design flaws makes itself felt very often: either a breakdown will occur, or the pipes will rust.

The exhaust on a VAZ is easier to replace than to repair.

For urban conditions, expensive tuning does not make sense, so it is worth looking for a more reliable analogue, for example, a stainless steel exhaust system kit.

VAZ cars of the 14th and 15th models are still in demand among Russian drivers today. The machines are easy to use, do not require vigilant attention and rarely require repairs. However, they also have a “sore spot” - the mufflers. Therefore, VAZ 2114/2115 owners need to be prepared for the fact that sooner or later they will have to repair or replace the silencer on their car.

How to repair a “glushak” with your own hands

The muffler on the “fourteenth” and “fifteenth” is considered one of the most vulnerable points of the car. The fact is that due to exposure to high temperatures, the metal quickly burns out, that is, the tightness of the system is broken. Therefore, the part must be changed as soon as there is a suspicion that it is not working.

Reasons for failure

Most often, mufflers “burn out” - that is, due to hot exhaust, the metal inside the housing begins to thin out, which ultimately leads to the appearance of holes. However, this is not the only reason why the silencer may fail:

using a homemade device - handicraft products do not differ in quality and long service life;

mechanical shocks from uneven roads - dents and deformations of the pipe also lead to loss of tightness;

Rust and corrosion sooner or later affects even the highest quality original mufflers.

In general, all of the above factors influence service life to some extent. The car owner can easily identify all of the above faults - just drive the VAZ into the inspection hole and visually examine the muffler. In addition, when deformations, burnouts and corrosion reach their “peak”, the part will begin to make characteristic sounds when moving - gurgling, sharp pops, knocking.

Why is the muffler knocking?

This part on the VAZ 2114/2115 can make knocking noises only in two cases:

it hits the body;

When moving, it touches the gas tank housing.

In any case, it is necessary to immediately take measures to eliminate this malfunction. Most often, the problem lies in severe wear of the rubber suspensions. It is enough to change them and the muffler will again return to its normal position under the bottom of the car.

Pendants are inexpensive, so you can buy new products without spending any money.

What's the result?

Taking into account the above information, it becomes clear that on the VAZ 2114 the exhaust system is not particularly complex in design. We also note that if you need to replace a VAZ 2114 muffler, the price of new system elements (both original and analogues) is at a completely acceptable level.

The main thing is that when choosing exhaust system parts (especially among analogues), you should pay attention and purchase only aluminized mufflers, which are the best solution in terms of quality and price. It is also advisable to study in advance the reviews of car enthusiasts for a particular brand and manufacturer before purchasing. This will allow you to buy a muffler that is most durable in terms of service life.

Diagnostics and repair of muffler VAZ 2114–2115

Every car exhaust system has a muffler, and for many car enthusiasts its purpose is obvious. Driving around the city with a loud and toxic exhaust will be uncomfortable, and fines for exceeding the permissible noise level and harmful emissions from the operation of the car today are quite large. When operating VAZ cars, the muffler is often not given due attention, although it is useful to know how to correctly diagnose the degree of its wear. Timely replacement of the damper is mandatory, since its malfunction can pose a threat to human health and the operation of the car engine.

Silencer - purpose, device, operation

An important element of the exhaust system is the muffler; operating a car without it is impossible. As a rule, the muffler is located at the rear of the vehicle and, in conjunction with the exhaust system, serves to remove harmful gases from the engine, bypassing the vehicle interior.

Car mufflers are made from stainless, aluminized and regular black steel. Stainless steel “silencers” are practically not available for sale due to their high cost and long service life (their service life is 10–15 years). Aluminized mufflers are installed on VAZ 2114/2115. They are common in the domestic and European markets (service life 3–7 years). Regular black steel mufflers are cheap substitutes and last only a few months, so are rarely used.

What is a “glushak” for?

Main functions of the muffler:

reduction of noise during fuel processing;
reduction in the rate of gas release and their temperature.

The muffler is attached with special rubber pads to curved metal hooks, softening vibrations from the car exhaust.
All elements of the exhaust system are exposed to high temperatures, so the coating (anti-corrosion paint, mastic) that is applied to the muffler burns out. The exhaust system of the VAZ 2114/2115 is mounted under the body on the bottom of the car.

An additional muffler or, in other words, a resonator is designed to eject burnt gas into the exhaust pipe and receive the next portion.

The resonator is an important part of the exhaust system; it directly affects engine power. The faster the exhaust gas is removed from the resonator, the faster and more power the car develops.

The muffler on the VAZ 2114/2115 is attached to the bottom of the car with special rubber bands, clinging to flat hooks on the side and top. Why is an elastic band used, and, say, not a metal fastener?

As exhaust gases pass through the exhaust pipe, vibrations intensify, the muffler begins to vibrate, and if the mount is solid-state, the vibration will be transmitted to the cabin. The rubber muffler mount softens vibrations and is therefore used on all cars.

For the VAZ 2114/2115, the muffler is a volumetric sealed metal chamber, divided inside by various partitions. The entire exhaust gas flow passes through the muffler sections and is finally extinguished and cleaned. If you look at the muffler diagram, it will look almost the same on all cars.

The principle of removing exhaust gases from a car muffler

Muffler mount

The muffler hangs on the car using the muffler suspension cushion (5), and the components of the muffler are connected to each other by gaskets, O-rings, and clamps.

The exhaust system of the VAZ 2114 serves to remove fuel combustion products from the engine unit. There are practically no special features in the design of the channels: it is the same as that of the entire VAZ family. Nevertheless, it is worth discussing some details, for example, how to tune the exhaust system of a VAZ or replace old structural elements with new ones.

Replacing the muffler on a VAZ 2114/2115

Muffler failure on a car can happen for various reasons:

mechanical damage;
influence of atmospheric and mud precipitation;
burnout of the internal elements and walls of the muffler.

Signs of a malfunction most often manifest themselves in increased exhaust sound: the car is very loud, rumbles, an abundance of exhaust gases appears from under the car in the muffler area and the smell of unrefined fuel.

How to change the "glushak" with your own hands

In many cases, the muffler cannot be repaired and requires urgent replacement. This is not as difficult to do as it seems. You will need:

new muffler + repair kit (rubber cushions, corrugation, metal-graphite ring installed under a clamp at the junction of the pipes of the additional and main mufflers);
tools;
portable lamp;
inspection hole or jack;
two hours of free time;
hands growing from the right place.

The repair kit consists of 5 rubber pads, two clamps and O-rings, a gasket

It is recommended to purchase replacement parts from trusted suppliers, as otherwise you may stumble upon a low-quality fake.

After purchasing parts, you need to make sure that they are actually suitable for replacement. You need to check all fasteners, holes and bends.

If all of the above corresponds to the parameters, you can begin dismantling the broken muffler. After installing the car on the inspection hole, check the condition of the fasteners and connecting bolts of the clamp between the additional muffler pipe and the main muffler pipe.

How to remove the muffler

It is recommended to dismantle the unit in the following sequence:

Before unscrewing the nuts, treat the threads with WD-40 or rust remover and wait 10 minutes.
Using a socket wrench or a 13mm socket, unscrew the two nuts holding the clamp.
After removing the clamp, remove the sealing ring.
Remove the rubber pads holding the muffler.
Disconnect the muffler from the resonator.

Repair of muffler VAZ 2114/2115

Before replacing the muffler, it is necessary to inspect it for damage. In some cases, you can get by with minor repairs and not spend money on buying a new part. Restoring the performance of the muffler is carried out according to the following algorithm:

The muffler and weld seams are cleaned with emery cloth.
The entire part is inspected for cracks, burns, and damage.
If a defect is detected, use semi-automatic welding and weld the cracks. A metal plate with a thickness of at least 1.5 millimeters can be welded onto the burnout areas. Seal small cracks with high-temperature sealant.

All working areas must be sanded for a better result.

Welding is used if the muffler metal is strong enough. The seams are welded in a thick layer to avoid background and new burnout.

Video: how to install a “glushak” in a garage

Reasons for part failure

The muffler is affected by several different factors that can lead to failure, these are:

Atmospheric precipitation, dirt. Precipitation means the occurrence of rain and snow. A mass that periodically falls on a hot pipe causes temperature changes, destroying the strength of the metal. Unfortunately, it will not be possible to protect the muffler in any way; moisture will in any case affect the metal. A smart solution would be to avoid driving through deep puddles and drive slowly on contaminated sections of the road. If the muffler and pipe are dirty, it is necessary to clean it with water (you can use a pressure jet from a hose). After cleaning, it is recommended to start the engine so that any water that has entered the muffler evaporates.
Condensate. When the unit is idle for a long time, condensation forms in the muffler, causing a corrosive process. This leads to inevitable destruction of the internal parts of the muffler. This happens extremely rarely, but before the trip it is recommended to increase the operating speed by pressing the accelerator several times. The flow of exhaust gases removes moisture from the silencer.
Chemical influence. As a result of the release of exhaust gas, a lot of toxic chemical particles settle on the walls of the muffler, destroying the metal, and allowing road reagents to get into the muffler.
Physical influence. Hitting stones and blows from the muffler when driving on roads also lead to a lot of damage.

The chemical and physical effect on the muffler metal is a natural process. It will not be possible to disassemble and clean the muffler, since the container cannot be opened, and only the attention and professionalism of the driver on the road will help protect it from impacts and stones. Diagnosing and repairing minor damage at the initial stage will help avoid serious problems in the future.

The influence of various negative factors can lead to damage to the corrugation or other parts of the muffler

Extraneous sounds in the jammer

The causes of various noises and knocks in the muffler can be:

Fastening the muffler to wire or ties. You should not wrap the muffler on a wire, otherwise rattling and knocking will occur. Use only rubber cushions.
Foreign objects entering through the exhaust pipe. When driving over rough terrain, deep puddles, or driving in reverse, you should not forget that the exhaust pipe is literally 20 cm from the road surface, which means that various masses and stones can be thrown into the muffler. They often knock and rattle.
Peeling of burnt metal inside the muffler. As a result of chemical exposure, a layer of soot forms on the walls of the silencer. For this reason, over the years, rattling noises can be heard inside the muffler due to peeling metal.
Condensation also affects the exhaust sound. Condensation forms as a result of prolonged idling while the engine warms up. Ringing and gurgling are signs of accumulated moisture in the muffler. By increasing the speed several times, the condensate comes out and the signs of the malfunction disappear.

These points are possible factors influencing the exhaust sound of a muffler and are considered the most common.

Repairing and replacing the muffler on a VAZ 2114/2115 is available to every car enthusiast; the only question is confidence and time. It is easy to replace an old part with a new one if you have the tools at hand, but it is recommended to entrust the troubleshooting of the muffler to professionals. Any auto repair shop does this type of work. For little money and a short period of time, your muffler will be repaired. Remember, prevention is a reliable method of treatment!

What is the VAZ 2115 exhaust system and how to replace the muffler

Welcome, friends, to the DIY car repair website. The exhaust system of the VAZ 2115 consists of many components and connections.

In today's article we will look at what it is and how to change the VAZ 2115 muffler yourself in your own garage.

Exhaust system VAZ 2115

First of all, you first need to figure out what the exhaust system is for, what parts it consists of, so that later it would be easier to understand which part of the node connections needs to be changed.

So, I think everyone understands that the VAZ 2115 exhaust system is designed to remove exhaust gases from the engine, which in turn pass through all components and are released into the atmosphere.

What does the exhaust system consist of:

Fastening the exhaust pipe connection (bracket).
Gasket between exhaust manifold and pipe.
Bracket pressure plate.
Reception pipe.
Metal-graphite gasket (ring).
Catalyst.
Rubber mounting pad.
Additional muffler.
Main muffler.
Rear mounting cushion.
Fastening brackets (clamp).

Having understood the device, you can now understand that all parts of the VAZ 2115 exhaust system are easily separated, which means it is not difficult to change them without the involvement of specialists.

All car enthusiasts know that the muffler is located under the bottom of the car, so it is exposed to various mechanical, atmospheric and other influences, which can lead to its malfunction.

We also recommend that you familiarize yourself with the materials on our website, which will help you replace the VAZ 2115 ball joints yourself.

Many people have probably been in such situations when an increased level of noise appears in the car, the smell of exhaust gases, all these reasons are possible due to damage to the additional and main muffler, burnout of the gasket between the connections.

Possible malfunctions:

Mechanical damage.
Gasket burnout.
Burnout of the muffler itself.
Loose connections at the joints.
Cracks in exhaust pipes.

So, having identified a malfunction of one or another part of some unit, we begin to eliminate it. Of course, before doing this, it must be purchased at a spare parts store. Using the example of replacing a muffler, we will analyze the entire repair process step by step.

Inspection

It is worthwhile to carefully inspect the muffler before starting repairs. And it would be better if the muffler was removed from the car so that it was all visible. After all, when working suspended, bending over in an inspection hole, a person quickly gets tired and may not notice all the defects. So:

if no damage was found during the inspection, then the cause is most likely hidden in the internal resonator (in this case, you will have to arm yourself with a welding machine, cut out the resonator and replace it with a new one);
If small holes or burnouts that were formed due to corrosion are discovered during the inspection, then a special sealant with an operating temperature range of 1000 degrees will help (before applying this sealant or, as it is also called, cold welding, you need to thoroughly clean surface);

Cold welding for mufflers

if large holes are found that cold welding will not help, it will be necessary to use fiberglass (it can be bought at any auto store along with epoxy resin, which is used for gluing).

Corrugation repair

Corrugation, in the process of replacing the muffler on a VAZ 2115

It also happens that during the inspection process the unsuitability of the muffler corrugation is discovered. This is a flexible connection that serves to secure the exhaust pipe to the engine. There may be several reasons for the failure of this part:

a faulty catalyst, which, if clogged, creates excess pressure that negatively affects the corrugation;
the walls of the corrugation are corroded by exhaust gases, since the rubber mounting of the muffler was damaged or the engine mounts were damaged;
the corrugation braid has been mechanically damaged by chemical reagents or gravel.

It is believed that the corrugation is one of the weak points of the vehicle exhaust system. First of all, experts recommend paying attention to it. Its design is an elastically tied knot that is capable of absorbing vibrations coming from the machine’s engine. The corrugation is usually replaced with a three- or two-layer braid. The corrugation installation process is not complicated:

We cut off the old corrugation using a grinder;
clean the cut;
welds a new corrugation in this place;
check the tightness;
We cover the joints with a layer of paint (this is done to ensure a long service life).

Needless to say, this type of work requires simple skills in handling tools and welding.

Complete muffler repair (replacement of exhaust pipe)

As mentioned above, there may be several reasons for the failure of the muffler. Accordingly, its repair will involve various solutions. So, if the reason is a failure of the exhaust pipe, and exhaust gases break through under the bottom of the car, you need to arm yourself with a set of keys, a new clamp with an internal diameter of 46 mm and a new sealing gasket. First, it is recommended to watch this video, which presents a repair kit of necessary parts.

we lift the car onto an overpass or inspection hole;
take a 13mm socket wrench and unscrew the nut of the tie clamp (during the process you need to hold the bolt from turning with a second wrench of the same size);
move the clamp towards the additional muffler of the system;
take the lubricant and apply it to the junction of the exhaust pipe and the additional muffler (it will help loosen the rust and the connection will “get wet”;
take a hammer and strike through a wooden block on the surface of the front additional muffler;
we move it from the exhaust pipe (photo below);

Front additional muffler VAZ 2115

use a 13mm wrench to unscrew the bolt that secures the exhaust pipe to the bracket (it is sometimes located on the gearbox);
take a flat-blade screwdriver and bend the edges of the locking plates of the nuts that secure the exhaust pipe to the exhaust manifold;
take a 13mm socket wrench and unscrew the nuts (there are four of them);
with our own hands we remove the locking plates, as well as the exhaust pipe flange from the exhaust manifold studs;

Exhaust manifold of a VAZ disassembled

we find the seal gasket under the studs;
extract it;

Manifold seal gasket

we bring the exhaust pipe down so that it is between the crankcase and the steering rod;
treat the junction of the additional muffler and the exhaust pipe with a graphite-containing lubricant;
replace the old sealing gasket and install a new one;
install new parts;
We assemble the exhaust pipe in the reverse order.

I would like to note that the new nuts securing the exhaust pipe to the manifold must be locked.

Complete muffler repair (replacement of main muffler)

In this case, in addition to exhaust gases breaking through under the bottom of the car, the bottom itself will rattle. You can replace a faulty main muffler with a new one, the price of which is not so expensive. So:

the car rises onto the pit;
the additional and main mufflers are separated;
the hooks of the suspension straps are bent;
detached from the brackets;
the main muffler attached to the pillow is removed;

Dismantling the main muffler VAZ

Installation of all parts is carried out in reverse order.

We hope this article will help you repair your muffler. On our website you can find a lot of material on many types of repairs.

How to replace a VAZ 2115 muffler on your own

We drive the car into a pit or overpass, use a metal brush to clean the bolts on the clamp connecting the muffler pipe to the resonator and unscrew it.

Once the clamp is unscrewed, pull out the O-ring gasket that is located between the connections.

Next, remove the muffler from the rubber pads on which it is suspended. Before installing a new muffler, clean the ring thoroughly; you can even coat the gasket with a heat-resistant sealant, which will allow you to avoid the passage of exhaust gases between these connections.

Assembly is carried out in the reverse order, we hang the new spare part on rubber cushions and connect the resonator to the muffler with a clamp. If other units become unusable, they are changed in the same way.

Replacement problems

Most often, problems arise when dismantling the old element. It simply sticks to the resonator. Sometimes bolts break. In this case, you can use a grinder. But you need to act carefully so as not to catch the resonator. If the latter has also become unusable, the problem with dismantling does not go away. Along the chain, the resonator similarly sticks to the receiving pipe. If they also change, you should stock up on the gasket we talked about earlier. It looks like this.

This part compresses the exhaust pipe with the manifold and prevents exhaust gases from leaking out. Thanks to the gasket, they follow strictly along the pipe - to the muffler, and then to the street. There is also a problem when unscrewing the bolts. If they “don’t work”, they are also cut off with a grinder. New ones are installed in their place.