Spark plug gap on VAZ 2114 (injector, 8 valves) - what it should be, how and what to measure

What should be the correct gap on the spark plugs of a VAZ-2114

Many VAZ-2114 owners have encountered adjusting the gap on the spark plugs. But not everyone fully understands what this indicator should be, because it can become a problem that motorists face. the gap on the spark plugs, what it should be, how the gap in the spark plugs affects idle. What should be the gap on the VAZ-2114 spark plugs? What is the mileage of these here to bend it so that the gap becomes on the first and fourth candles. These may include improper operation of the engine, poor starting, failure to start the engine, and also the car will stall and stall.

Video about checking the clearance on VAZ family cars:

The video will tell you what the spark plug gap should be, and also tell you about some of the nuances and subtleties of tuning.

NEW Spark plugs DO NOT MEAN READY for Installation! Check the gaps!

New candles

- does not yet mean prepared for installation!
Be sure to check the gaps on the spark plugs
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To correct it, you need to bend the outer electrode or move it out a little.

After the adjustment, it is worth measuring the gap again. The procedure continues until the spark plug distance between the electrodes reaches the established standards.

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Note. Many motorists believe that in automotive spare parts stores, spark plugs are sold with the gap already set. But that's not true. Since spark plugs are the same type for many brands and models, they have a standard gap of 1 mm. Therefore, after purchasing a new set, you need to set them according to the specified size.

How to check and how to set it

The process is not as complicated as it seems at first glance. To begin with, we simply unscrew the spark plugs, then look for damage; if there is none, then you can first clean it, then check the gap.

Of course, the gap can be measured with conventional measuring instruments, just a ruler. However, it is very difficult to determine 0.5 or 0.7 mm by sight! Therefore, now in stores you can buy so-called sets of “feelers” or special keys for checking the gap.

The probes are similar to metal curved letters “G”, with different sizes; we simply place them between the electrodes and determine the gap with an accuracy of 97%. If it is larger, for example on an injector than 1.1 mm, then the contacts are brought closer to each other, you can simply tap with the handle of a screwdriver. If it’s too close, then we move them apart from each other, again checking with a probe.

Effect of incorrect clearance on engine performance

As practice shows, many motorists make the same mistake - install spark plugs without adjusting the spark plug gap between the electrodes. what should be the gap on the spark plugs, we look and do VAZ 2115,2114,2113,2199,2109,2108 This can lead to the following consequences:

• A large gap leads to increased consumption of the fuel mixture. Many car enthusiasts may be pleased with the appearance of additional dynamism and traction until they see a consumption of 12-15 liters per 100 km. Another indirect indicator may be gas dips or a jerking effect. This will not only affect consumption, but also the wear and tear of the motor itself.

Black soot is the first sign of a very rich mixture.

Modern technologies

What I want to say in conclusion, many will think “come on,” why should I bother with some distance between the electrodes! Guys, very wrong thoughts.

Firstly , you can save on fuel, studies show up to 5 - 7%

Secondly , smooth engine operation is the key to driving safety.

Third , the correct gap between the spark plugs increases their service life; there is no chance that the insulator will break through (with an increased distance).

I would like to note that some companies, on the contrary, increase the number of contacts (electrodes), strengthen the coils and the ignition system, all so that the mixture is ignited better.

There are also more modern technologies now, which I think will soon replace them - such as plasma candles.

They have no electrodes at all, and the fuel is ignited by a beam of plasma that is generated by electricity. As they write, the production is now undergoing tests and they say that the combustion efficiency of the fuel mixture is increasing, which means a little more power, a little more economy and environmental friendliness of the engine.

And that’s all for me, read our AUTOBLOG, it will be interesting.

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Any internal combustion engine will not start operating without 2 main factors - the air-fuel mixture and its ignition. If the saturation of the fuel with oxygen is facilitated by the air supply system (air filter, throttle), then the VAZ 2114 spark plugs are responsible for ignition.

The principle of operation of the product is that operating voltage from the battery is supplied to the spark plug through the ignition coil, as a result of which the device produces a spark that ignites oxygen-enriched gasoline directly in the cylinder.

What is the gap on the spark plugs of VAZ 2114

Driver tips and reviews

Selection of spark plugs for VAZ 2114

In the ignition circuit of the VAZ 2114, spark plugs play a central role. In fact, it is the spark plugs that carry out the control signal that comes from the ignition key when it is turned to the start position. Having received a 24 kV signal, the spark plugs generate a spark and ignite the fuel injected into the combustion chamber. Therefore, vehicle drivers pay a lot of attention to them. In order to choose the right SZ, you need to know the features of their design.

Design and features of the use of spark plugs for VAZ cars

Spark plug device for VAZ 2114

In terms of design, the spark plugs for the VAZ 2114 are no different from the SZ used in the ignition systems of other cars. The main elements of this device are:

• the body is made of metal, on the outside there is a hex head for a spark plug wrench and a threaded part for screwing into the cylinder head housing, this part absorbs 67 percent of the heat generated when the spark plug fires and transfers 91 percent of this heat to the cylinder head housing;
• an insulator made of corundum ceramics with the addition of aluminum oxide, as well as oxides of other rare metals. It is inserted into a metal case;
• thermal cone, often called the thermal cone skirt. In fact, this is the lower part of the insulator; it absorbs 21 percent of the heat released at the moment of sparking;

All components of the spark plug on the VAZ 2114 play an important role, but special attention is paid to the central electrode. It must have such properties as heat resistance, high thermal conductivity, ductility and have high corrosion and erosion resistance. For this purpose, it is usually made from various nickel alloys. However, in recent years, in order to improve the efficiency of the spark plug and obtain any unique properties during its operation, this electrode began to be produced from metals such as copper, iridium, palladium, as well as with platinum deposition and silver or gold coating.

What should be the gap on the spark plugs LOOK WE DO VAZ 2115,2114,2113,2199,2109,2108

Despite the simplicity of the structure of spark plugs, they need to be worked and handled correctly. They need...

Injector spark plug gaps

Checking and adjusting the spark plug gap for the injection VAZ 2115.

How to choose spark plugs for VAZ 2114

The issue of choosing SZ if it is necessary to replace them must be taken seriously. Fuel consumption and engine power depend on how efficiently they work. When deciding which spark plugs are best for the VAZ 2114, the driver must imagine which task they should perform. Testing conducted by specialists suggests that correctly selected spark plugs for a specific engine can not only improve its performance, but also extend its service life. It is not without reason that special spark plugs with copper electrodes coated with gold are made for the forced engines of sports cars.

• The VAZ 2114 operating manual indicates how long it takes to change the spark plugs on a VAZ 2114. This is 30 thousand kilometers of the car. Of course, good, real factory spark plugs can last 50 and 70 thousand kilometers. But this does not mean that if no problems arise with starting and during movement, then the spark plugs do not need to be changed. In fact, as the electrodes wear out, the operating characteristics of the internal combustion engine change, and with careful monitoring this can be easily detected by the changed indicators in fuel consumption.
• Experts and experienced drivers strongly recommend changing spark plugs at least every 20 thousand km, and in winter even after 10 thousand km. In this case, it is necessary to constantly monitor the operation of the SZ and the gap between the electrodes. When the spark plug is unscrewed, its condition will be immediately visible by the color of the carbon deposits on the electrodes. It is also necessary to check the dryness of the threaded connection. The presence of fuel or oil on it indicates a lack of tightness in the system.
• The choice of spark plugs in auto parts stores today is quite large, and in order to decide which spark plugs to put on the VAZ 2114, you need to study the technical characteristics of all offered models. On forums and in automobile magazines, spark plugs with the brands “NGK”, “Finwhale” “Champion” “Brisk Premium” “Bosch Platin” are recommended for the VAZ 2114. For example, when passing tests, these kits, when comparing them with the Russian A17 DMRV from Engels, showed 5-6% better power and 3.5-4.5% better fuel consumption. Despite the fact that foreign spark plug kits are much more expensive than domestic ones, due to reduced fuel consumption they pay for themselves in six months.

How does ignition work in a cylinder?

If we talk about spark plugs, then this is like the last link in the ignition system, which is in direct contact with the air-fuel mixture. It is this element that sets it on fire, and does it either effectively and as laid down in the technical regulations, or ineffectively for a number of reasons (by the way, wear is often to blame).

After the fuel mixture (gasoline and air) has been supplied to the cylinders, the piston begins to go up and compress it, thereby increasing pressure.

At the peak or, as is commonly called, the “top point,” the ECU gives an order and this composition ignites. Moreover, it is ignited by the spark plug - a spark runs between the electrodes, which is the catalyst.

However, ignition may not occur, I am not currently considering options with a faulty ignition system, it’s just that the gap is set incorrectly. Thus, “missing” may occur (that is, the fuel mixture does not ignite), which will cause your engine to operate with low efficiency, and sometimes it will not start at all (for example, in the morning in winter). But why does this happen?

DIY replacement instructions

Replacing spark plugs on VAZ 2114 and 2115 is not a complicated process. This work can be performed by any motorist, following the step-by-step instructions given below.

Tools and materials

To carry out the procedure you need to prepare:

• key for removing protection;
• a set of round probes;
• spark plug key;
• new set of SZ.

To avoid counterfeiting, you should purchase original products.

The process of dismantling and replacing SZ

Unscrewed from the SZ socket

The procedure for removing and replacing spark plugs should be carried out on a cool engine to avoid burns.

The process itself consists of the following steps:

1. First you need to open the hood. Then you need to remove the protection from the engine, if present.
2. After removing the decorative trim, you need to remove the protective caps with high-voltage wires that are placed on the contacts. The caps should be removed carefully so as not to damage the wiring.
3. The areas near the NW should be cleared of dirt so that they do not get into the engine cylinders.
4. Now, using a spark plug wrench, you need to unscrew the S3 from the cylinder head. You can start twisting from any side. First you need to move it from the dead center, and then you can carefully unscrew the SZ from the socket.
5. Having turned out the old SZ, you need to wipe the thread with a rag.
6. Before screwing in new products, it is advisable to check the gap on each of them. For cars with an injector, it should be from 1 to 1.13 mm.
7. Installing the SZ is the same simple procedure as unscrewing; it is carried out in the reverse order. New products are placed in the seats of old candles. You need to screw it in carefully so as not to damage the threads in the cylinder head or on the product.
8. Next you need to put on the ends of the high-voltage wires. In this case, you need to make sure that the numbers of the wires that are printed on them match.
9. At the final stage, the decorative overlay is returned to its place.

After replacing the SZ, it is necessary to observe how the engine operates. If it works intermittently, it is possible that one of the SZ has defects. To detect it, you need to sequentially disconnect each high-voltage wire. A faulty spark plug should be replaced.

Price issue

High-quality products always cost more. Domestic products are several times cheaper, but the quality leaves much to be desired. Therefore, it is worth buying imported candles that will last much longer than domestic ones. At the same time, the service life of the engine will be extended, and fuel will be consumed more economically.

1. Czech SZ Brisk (price per set from 275 rub.)

2. Set SZ Denso (price from 121 rub.)

3. SZ company NGK (price from 180 rub.)

A little theory

To answer the question of how to set the spark plug gap, it is worth understanding how such a mechanism works and why it is so important to select its parameters correctly.

The spark plug is designed to ignite the fuel mixture in the engine cylinders. They are controlled by a distributor-chopper, which sequentially supplies current to one of the spark plugs at the moment the cylinder is completely filled with the air-fuel mixture.

What happens if the spark plug is faulty or does not work for some reason? Obviously, combustion of the mixture in the corresponding cylinders will not occur. This will lead to the fact that the engine will work only due to the cylinders with “healthy” spark plugs. As a result, vibration will appear and there will be a sharp loss of power.

This unacceptable condition of the car clearly leads to accelerated wear of engine components. First, the piston group begins to fail, and then the rest of the parts begin to fail. To prevent this from happening, you should unscrew the spark plugs and check their condition visually. If there is no carbon deposits on the central and side electrodes, and the components themselves are not destroyed and the distance between them is not too large, then the spark plug is in good condition. If there is a suspicion that it is faulty, it is better to replace the part in order to avoid further problems with the car.

The gap, which is one of the spark plug parameters, also plays an important role. As you know, a spark flows between two electrodes - side and central. There is a certain distance between them, allowing the passing spark to linger somewhat and effectively ignite the gasoline mixture in the cylinder.

The gap between the igniters of spark plugs may vary, depending on the make and model of a particular car. The appropriate documentation describes what the spark plug gap should be. Basically, this value varies from 1 to 5 mm, and deviations from the given norm lead to dire consequences.

Thus, too large a gap between the components of the spark plug will lead to the fact that the current flowing between the electrodes will lose its power, no matter how intense the ignition coil current is. It’s easy to guess what this will lead to: the fuel mixture will not ignite completely or not ignite at all. Such a phenomenon will be equivalent to a completely faulty electrode and will inevitably lead to engine tripping and a sharp loss of power between adjacent strokes.

Symptoms of a problem

If the spark plugs fail, there will be no spark. Consequently, the fuel mixture will not be able to ignite, the engine will freeze and show no signs of life. There are several telltale signs that may indicate poor spark plug performance.

• The engine starting procedure gets worse. The starter turns, but the motor itself does not respond;
• Fuel consumption increases;
• CO emissions increase;
• At idle and while driving, the engine begins to jerk the car;
• The dynamic performance of the car drops, it is not possible to raise the speed to the required maximum, the engine power noticeably decreases, etc.

But all these are indirect reasons, since they do not directly indicate the failure of the spark plugs.

Replacement process

Before replacing, you need to prepare: study safety precautions, select the necessary tools and materials.

Safety rules when replacing spark plugs:

1. Carry out the replacement procedure when the engine temperature drops below 30-40 degrees Celsius. Thanks to this recommendation, you can prevent the occurrence of burns on the skin.
2. Disconnect the on-board network. To do this, disconnect the negative terminal of the battery.
3. Wear gloves. They will help protect your hands from minor injuries.

Required tools and materials:

• Candle key;
• Compressed air cylinder;
• Brush for removing dirt;
• New ignition elements;
• Gloves.

Step by step procedure for replacing spark plugs:

1. Stop the operation of the power unit. Wait until it cools down to an acceptable operating temperature.
2. Lift the hood lid. Using a special design, fix it in the open position.
3. Grab the rubber caps of the high-voltage wires and carefully pull them out of their installation locations.
4. Clean the surface from dirt using a brush.
5. Unscrew the ignition element using the key.
6. Carry out similar actions with the remaining candles.
7. Check the new spark supply element. Measure the gap between the electrodes.
8. Tighten the consumable by hand. Complete an action using a tool.
9. Connect high voltage wires.

Please note: the main mistake of a novice car owner is to confuse the wires. You can't do this

High-voltage wiring is connected according to the markings in strict sequence for each cylinder.

After replacing the spark plugs, an unpleasant surprise may await the car owner. The engine speed may “float”, the engine jerks. Reason: perhaps a novice car owner purchased a low-quality ignition part. Defective goods must be returned.

It is easy to find out which ignition element is not working. To do this, the high-voltage wires are disconnected one by one. If the engine sound remains the same, the part is faulty and must be replaced.

Cause of the phenomenon

The main reason why the VAZ 2114 burns spark plugs in cold weather lies in the following. During cold (and, especially, frosty) weather, the oxygen content in the atmospheric air increases sharply.

When the car starts, the sensors transmit a corresponding signal to the ECU, thereby causing an increased supply of gasoline (this is due to the fact that more oxygen requires more fuel, otherwise the mixture will be lean and the engine will not work correctly).

Candle VAZ 2114

If the car is new, and all components and assemblies of its fuel system and engine are fully operational, then the increased volume of gasoline will not cause any difficulties at the time of start, and the car will start immediately. But, if the car is more than 3 years old (subject to frequent use), then the problem with flooded spark plugs becomes more than real for it.

The most common reasons for flooding the spark plugs on the VAZ 2114 injector are:

• low compression due to piston wear;
• low quality of fuel used;
• bad (poor quality) candles;
• low battery level.