NGK spark plugs for “classics” (VAZ 2101, 2102, 2103, 2104, 2105, 2106, 2107)

The most common type is gasoline cars, which require full maintenance. Usually a simple part like spark plugs doesn't raise many questions. However, the unit requires more attention than most motorists think. The stability of the engine and the service life of the ignition system depend on the correct choice.

In 2022, there are a large number of models and companies on the market that, in their opinion, produce the best spark plugs for VAZ and other car models. But it is not always the case.

Cost and article number of original spark plugs for VAZ 2107 and their analogues

On the VAZ 2107 car, which has a carburetor and a contact ignition system, original A17DVR spark plugs with catalog number 21010-3707010-86 are used. They cost from 240 to 350 rubles. Consumables from the Engels plant are packaged under the LADA brand.

In retail sales, a direct analogue is found with article number A17DVR. Other good alternatives to native candles can be found in the table below.

Table - The best analogs of original spark plugs for a VAZ 2107 with a carburetor and a contact ignition system

Original spark plugs 21010-3707010-86
On carburetor VAZ 2107 with contactless ignition, original spark plugs A17DV-10 with article numbers 2108-3707010-86 and 21080-3707010-86 are used. The price for these consumables ranges from 230 to 350 rubles. LADA only completes spark plugs to sell under its own brand.

The real manufacturer is the Engels plant. It produces a direct analogue with catalog number A17DV-10. Other good alternatives can be found in the table below.

Table - Optimal alternatives to branded spark plugs for a carburetor VAZ 2107 with a contactless ignition system

The VAZ 2107, which has an injector under the hood, uses original A17DVRM spark plugs with article numbers:

• 21110-3707010-86;
• 21110-3707010-00;
• 2111-3707010.

The cost of branded consumables varies from 210 to 300 rubles. Despite the fact that candles are sold under the LADA brand, they are produced by the Engels plant. It produces identical consumables for retail sale under the article number A17DVRM. Other good third-party products can be found in the table below.

Table - The best alternatives to original spark plugs for the injection VAZ 2107

Original spark plugs for the injection VAZ 2107
A distinctive feature of the spark plugs for the carburetor VAZ 2107 with a contact ignition system is the absence of an interference suppression resistor. The spark plugs and the gap differ. It is largest for an injection car and is 1.0-1.1 mm.

The smallest gap is for cars with a contact ignition system. On them it is only 0.5-0.6 mm. The VAZ 2107 with contactless ignition has an average distance between the electrodes. For such machines, the gap is in the range of 0.7-0.8 mm.

Types of ignition systems

The very first is the contact system, which was used on the VAZ 21074 of the first production. Its basis is a mechanical ignition distributor (distributor). A spark is formed when the contact group in the distributor body is closed; conversion to high voltage is carried out using a coil, which is a step-up transformer. And only after the spark is distributed by the distributor does it appear on the VAZ spark plugs. This system is obsolete, because the presence of contacts significantly reduces the service life due to their frequent burning.

Bosch is famous for its quality products

The non-contact ignition system is considered more progressive, which began to be used on the VAZ 21074 towards the end of the last century, when the carburetor was replaced by an injector, reliable and durable. The same distributor, only instead of a contact group there is a Hall sensor, which reacts to the passage of a cylindrical metal plate with slots near it.

The system is controlled using a switch, which amplifies the signal coming from the Hall sensor and supplies it to a high-voltage coil. From the coil, through a distributor with a slider, a much stronger spark is supplied to the spark plugs, so if the electrodes break down, it is necessary to replace the spark plug on the VAZ 2107 with a new one.

Recommendations for replacement intervals

According to official recommendations, replacement of spark plugs is required every 30 thousand km. In real conditions, low fuel quality causes consumables to fail by 12-15 thousand km. The need for replacement can be determined by the following symptoms:

• there is a missing spark;
• During the inspection, black spark plugs with irremovable carbon deposits were found;
• Any damage shown in the image below has been identified.

Damage to spark plugs

What are the dangers of choosing the wrong candles?

There is a wide range of spark plugs on the automotive spare parts market, which causes some inconvenience for car owners when selecting the appropriate model. The main difficulties are related to the fact that each engine is designed for a specific modification of spark plugs. When installing incompatible options, the following problems may occur:

• misfire of the air-fuel mixture due to an excessively large gap between the electrodes;
• malfunctions in engine functionality due to low spark power;
• rapid damage to the spark plug due to the electrodes flying out.

Other types of malfunctions that negatively affect the operating comfort of the vehicle cannot be excluded.

Description of replacing spark plugs on a VAZ 2107

To replace spark plugs on a VAZ 2107, you must follow the instructions presented below.

• Open the hood.
• Remove the tip of the high-voltage wire.

Disconnecting the tip of the high-voltage wire

• Unscrew the spark plug.

Unscrewing the spark plug

• Remove the candle.

Unscrewed candle

• Check the gap and adjust it if necessary.

Checking the gap

• Screw in the candle.
• Connect the high voltage wire.

Content

Device “Hot” and “cold” or what is the heat rating What you need to know about the marking of spark plugs and which ones to put on the VAZ-2107 For classic VAZ models with contact ignition For models with contactless SZ For injection engines How to choose high-voltage wires To summarize:

A mistake in choosing spark plugs can “kill” the engine. Spark plugs can affect fuel consumption. There are “incompatible” spark plugs and high-voltage wires. In this article, we'll look at what you really need to know and consider if you service your car yourself. After all, this small device, which looks so simple, is in fact a complex and high-tech product with strictly adjusted dimensions, made from materials specially designed for candles.

Spark plug device

Device

The candle is assembled in a metal case, which has a threaded part (thread diameter from 8 to 18 mm) and a hexagon (from 13 to 25.4 mm). A ceramic insulator is installed in the housing, with an electrode running through the center. The lower part of the insulator forms a thermal cone, which is placed on a heat sink for better heat removal. Depending on the design, a resistor or glass sealant is placed between the central electrode and the contact rod. The assembled insulator is rolled into the housing. In the lower part, one or more side electrodes are welded to the end of the housing.

“Hot” and “cold” or what is the heat rating

The part of the spark plug that is inside the combustion chamber must have a strictly defined temperature when the engine is running at full power - from 500 to 600 degrees Celsius. Engines with different degrees of boost have different thermal load, based on which the size of the thermal cone and the contact area between it and the housing are selected.

If the temperature is lower, the candle will not “self-clean” and will become covered with soot. After some time, the electrodes will close and the spark plug will stop working. This happens when the installed spark plugs are too “cold” - they have too high a heat rating: for example, if instead of A17 you install A23, the engine “doesn’t like” such spark plugs, it will begin to have difficulty starting, often “triple”, and shake at idle. The engine loses power and gasoline consumption increases. This is, of course, bad.

It is much worse when spark plugs that are too “hot” are installed in the engine, that is, those with a lower heat rating. Due to the high temperature of the electrodes and the thermal cone of the insulator, the combustible mixture, entering the cylinder, is ignited not by a spark, but by the hot parts of the spark plug. This happens “spontaneously” - sometimes earlier, sometimes later, the engine suddenly loses power, runs after the ignition is turned off, and the valves and piston may “burn out.”

Read, it might come in handy: Installing the ignition on a VAZ 2107: video, instructions

Highly accelerated, high-speed engines are usually equipped with “cold” spark plugs. They feel great under heavy loads, but long periods of idling or light loads will lead to the formation of a layer of carbon deposits.

Engines with an average degree of boost, for example VAZ engines, require spark plugs with an average heat value.

Low-speed, non-boosted engines are equipped with spark plugs with low heat ratings - “hot”.

What you need to know about the marking of spark plugs and which ones to put on the VAZ-2107

According to domestic GOSTs, this is A17DVRM , where 17 is the heat number (candles are produced from 10 to 23 units). The remaining letters indicate design and dimensional features. Today we need the letter “P” to indicate that a noise suppression resistor is built into the spark plug.

Here is an example of NGK markings: BPR6ES11 . Here the number 6 is the heat number (on a scale from 2 to 13 units), the letter R indicates the presence of a resistor. Expensive brands of candles have the letter “Z” instead of “R” - this is an inductive resistor, it does not lead to loss of spark energy. The number “11” at the end of the mark indicates a gap of 1.1 mm. These spark plugs are suitable for injection "seven".

For carburetor models, choose spark plugs without the letter “P” or “R” in the marking: A17DVM, BP6E . They do not have a built-in noise suppression resistor, which will weaken the already not very powerful spark.

Expensive spark plugs with platinum and iridium electrodes have good performance and last a very long time. But it is very difficult to find a model for carburetor engines among them - they all come with a built-in resistance. The solution is to choose a model with an inductive resistor (Z in the marking).

Below you can see recommendations for candles from other manufacturers.

For classic VAZ models with contact ignition

• BERU W7D
• BOSCH W7D
• BRISK L15Y
• CHAMPION N10Y
• DENSO W20EP
• EYQUEM 707LS
• MARELLI FL7LP
• FINVAL F501
• HOLA S12
• WEEN 121-1371. The gap between the electrodes should be 0.5-0.7 millimeters.

For models with contactless protection

• BERU 14-7D, 14-7DU, 14R-7DU
• BOSCH W7D, WR7DC, WR7DP
• BRISK L15Y, L15YC, LR15Y
• CHAMPION N10Y, N9Y, N9YC, RN9Y
• DENSO W20EP, W20EPU, W20EXR
• EYQUEM 707LS, C52LS
• MARELLI FL7LP, F7LC, FL7LPR
• FINVAL F508
• HOLA S13
• WEEN 121-1378. And the gap here is needed a little more - 0.7-0.8 millimeters.

For injection engines

• BERU 14R7DU
• BOSCH WR7DC
• CHAMPION RN9YC
• DENSO W20EPR
• EYQUEM RC52LS
• MARELLI F7LPR
• FINVAL F510
• HOLA S14
• WEEN 121-1370. The gap size here is larger - 0.9-1.0 millimeters.

This list, of course, is not complete; there are a lot of manufacturing companies.

How to choose high-voltage wires

Read this, it might come in handy: Why does the engine overheat?

To summarize:

Do not use spark plugs with a low heat rating - they can “kill” the engine.

Candles with the letter “P” or “R” in the marking are suitable only for injection engines.

For carburetor cars, choose high-voltage wires with minimal resistance; replace the resistor from the slider with a piece of wire.

Question for the experts: Hello Vazovody! What spark plugs to put on the classic 21074-carburetor-8 valve. -BSZ. ? I'm leaning towards bosch platinum. because they are praised on many forums. Tell me which ones to take, what markings should be on those that are suitable for carburetor classics? (that is, all sorts of Bosch WR7DP, WR7DC, etc.) there are spark plugs for injectors, for carbs, for 8-16 valves. Please tell me which specific Bosch platinum will fit the above-mentioned 2107? Do not offer other brands other than Bosch.

Best regards, Biatlon_fan-number_one

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VAZ 2106, 2107, 2108 and 2109 cars are very similar to each other in their design and engines. However, they were produced with both an injector and a carburetor, so when choosing spark plugs you need to focus on the fuel system and ignition option (contact or non-contact). The manufacturer of original spark plugs for all of the above cars is the Russian company “E3”, Engels.

According to the rating of spark plugs for the VAZ 2106 on PartReview dated 05/07/20, owners prefer NGK products. Manufacturers BRISK, Denso and Finwhale also stand out.

Troubleshooting

Systematic checking of spark plugs with your own hands allows you to get rid of a lot of problems and financial expenses, as well as give the car the opportunity to demonstrate its full potential on the track:

• It is important to detect and replace a faulty spark plug as quickly as possible.
• Based on the carbon deposits formed on it, you can easily diagnose the operation of the engine and ignition system components
• A typical cause of spark plug malfunction is incorrect selection when replacing
• Despite the fact that all car manufacturers literally shout: “Use only spark plugs recommended for this vehicle, or acceptable analogues”
• However, sometimes our own laziness gets in the way, and sometimes we don’t have the opportunity to purchase the right candle
• Therefore, we often establish what will turn up on a car
• We often justify such actions by saying that we don’t understand anything about replacing spark plugs.
• And you just need to choose and buy new ones in the image and likeness of the previous ones, and with the cooled engine turned off, unscrew the spark plugs using a special key, and then screw in new ones
• The main thing to remember is that new spark plugs must perfectly match all the geometric and thermal characteristics of the previous spark plugs installed by the factory
• Otherwise there will be problems
• If the heat value is insufficient (the so-called degree of thermal conductivity), the owner will face immediate problems with the operation of the engine and the entire ignition system
• And if the spark plug has a mismatch in the geometric dimensions of the threaded part (shorter than it was or longer), then it will either become clogged with carbon deposits or filled with gasoline and naturally work poorly
• Advice to those who do not like to tinker with equipment often, you just need to follow one simple rule to avoid problems with the engine:
• It is only necessary to change the spark plugs every 30 thousand kilometers.
• Check and clean every 5 thousand kilometers
• It turns out that to prevent faulty spark plugs from causing problems, you need to remove carbon deposits from the spark plugs 10 times (within two years with constant driving).

VAZ 2109: TUNING SOLEX CARBURETORS

VAZ 2109 carburetor tuning

VAZ 2109 carburetor tuning is a popular topic and very in demand lately. From the article we will learn how to do this. On a VAZ 2109, tuning a Solex carburetor or a carburetor from another manufacturer is carried out for only one main reason - to increase the power and dynamic characteristics of the car. To increase power, experts will disagree, it is necessary first of all to refine the power unit itself. Yes, this is true, but if you don't have enough budget, you have to take risks. Modifying the carburetor without improving other important elements is, of course, a risk, but in some cases it is justified.

Which parts to choose?

When choosing spark plugs for a VAZ 2106 car, you must be guided by the numerical value indicated on the marking. It denotes the heat value of the element, which characterizes the candle’s ability to remove heat and self-clean from carbon deposits during operation. According to the Russian classification, elements are divided into the following groups:

1. Heat number from 11 to 16 are “hot” candles. They are designed for engines with low compression ratios and low power.
2. The same, from 17 to 19. The most widely used spark plugs, including on VAZ 2101-07 cars.
3. The same, from 20 to 26, “cold” spark plugs are installed on powerful engines with a high compression ratio and temperature in the combustion chamber.

If you install too “hot” or “cold” spark plugs on a VAZ 2106 car, the engine will not be able to function in normal mode with maximum efficiency. The letter indices on the marking indicate less important parameters, but they also need to be taken into account. For example, a product with the designation A17DV is suitable for engines with a carburetor and an ignition system with mechanical contacts, and A17DVRM for power units with an injector.

The trouble is that the classification of imported candles differs from Russian ones, and there is no single measurement system; each manufacturer has its own. Therefore, before you buy reliable products from the Japanese company NGK or another brand for the VAZ 2106, it is recommended to study the table.

During interruptions, the car engine idles unevenly, the engine does not develop sufficient power, and it consumes gasoline more. Engine failures on a VAZ 2108, VAZ 2109, VAZ 21099 are usually explained by incorrect carburetor adjustment, a faulty spark plug or one of the cylinders, or air leaks into one of the cylinders. It is necessary to find the fault and, if possible, eliminate it. 1.

Start the engine of a VAZ 2108, VAZ 2109, VAZ 21099 car and leave the engine idling. Go to the exhaust pipe and listen to the sound of the exhaust. The sound should be smooth, soft, and of the same tone.

Popping noises from the exhaust pipe at regular intervals indicate that one cylinder is not firing due to a failed spark plug, lack of spark at the plug, excessive air leakage into one cylinder, or a significant reduction in compression in the cylinder. Popping noises occur at irregular intervals due to improper carburetor adjustment, ignition, severe wear or dirty spark plugs. If popping noises occur at regular intervals, you can try to replace the entire set of spark plugs yourself, regardless of the mileage and appearance of the spark plugs, but it is better to do this after contacting a car service center to diagnose and adjust the carburetor and ignition system. 2. If the popping sounds are irregular, stop the engine and open the hood. Check the condition of the ignition system wires.

High-voltage wires must not have insulation damage, and their tips must not be oxidized. If there is damage to the high-voltage wires, replace the faulty wire. 3. If there is no damage to the high-voltage wires, check the condition of the ignition distributor cover and slider.

Unscrew the two screws securing the plastic ignition distributor cover and remove the distributor cover. Inspect the cover inside and out. There should be no cracks or carbon deposits on the distributor cover, and the carbon contact should not be damaged or worn out.

Which parts to choose?

When choosing spark plugs for a VAZ 2106 car, you must be guided by the numerical value indicated on the marking. It denotes the heat value of the element, which characterizes the candle’s ability to remove heat and self-clean from carbon deposits during operation. According to the Russian classification, elements are divided into the following groups:

1. Heat number from 11 to 16 are “hot” candles. They are designed for engines with low compression ratios and low power.
2. The same, from 17 to 19. The most widely used spark plugs, including on VAZ 2101-07 cars.
3. The same, from 20 to 26, “cold” spark plugs are installed on powerful engines with a high compression ratio and temperature in the combustion chamber.

If you install too “hot” or “cold” spark plugs on a VAZ 2106 car, the engine will not be able to function in normal mode with maximum efficiency. The letter indices on the marking indicate less important parameters, but they also need to be taken into account. For example, a product with the designation A17DV is suitable for engines with a carburetor and an ignition system with mechanical contacts, and A17DVRM for power units with an injector.

The trouble is that the classification of imported candles differs from Russian ones, and there is no single measurement system; each manufacturer has its own. Therefore, before you buy reliable products from the Japanese company NGK or another brand for the VAZ 2106, it is recommended to study the table.

How do candles work?

To understand what is happening and why, we need to understand the nature of the phenomenon occurring, and the roots of the phenomenon are hidden deep under the hood:

• The chain reaction that leads to the VAZ 21093 i flooding the spark plugs begins when you just turn the key in the ignition
• When a combustible fuel-air mixture is supplied to the combustion chamber, which consists of a mixture of gasoline and air that entered this chamber through the intake valves. These valves were brought into operation by the starter. Everything is clear here for now
• The spark plug at this point in time provides an ignition spark, which “comes” through the high-voltage wires from the ignition coil
• Then the mixture of fuel and air ignites from a spark, and a small micro-explosion occurs, after which the engine starts, valves and pistons, and all other mechanisms begin to move

Scheme for detecting problems in the ignition system based on the state of the spark plugs

So that you can independently identify faults in the ignition system, the photo above shows a table. So:

• As you understand, the most important elements in this chain of interactions are the spark and the combustible mixture of fuel and air
• Therefore, if there is no spark for some reason, the motor simply does not work.
• Therefore, after a few minutes of rotating the engine with the starter, the spark plug is filled with unburnt fuel, causing it to get wet.
• It turns out that the VAZ 21093 floods the spark plugs and there will be no normal spark, and without a spark there is no ignition
• You should be aware that in damp autumn or cold winter weather, ignition of the combustible mixture of air and fuel may not occur, even with fully working spark plugs
• Simply, when the temperature of the surrounding atmosphere (environment) drops below 15 degrees, the mixture of fuel and air is cooled to such a limit that ignition problems begin to arise
• In addition, problems arise with the spark; the spark plug does not work in normal mode, but in high load mode
• If the engine does not start immediately, the owner stubbornly continues to rotate the engine with the starter
• Then the VAZ 21093 gets flooded with spark plugs (like any other car), and they stop functioning completely