Which spark plugs are better for the VAZ-2112 injector 16 valves: survey

All gasoline engines use spark plugs to ignite the fuel mixture, and the VAZ 2110 is no exception. Good and serviceable spark plugs are the key to reliable and stable operation of the car’s power plant. The choice of spark plugs for the VAZ 2110 must be approached wisely, and before installation, the correct gap between the electrodes must be set, but not many people know the necessary parameters for selecting spark plugs and setting the gap.

This article will talk about spark plugs for the domestic “ten”, and specifically talk about their service life, independent replacement, setting the gap and selecting the optimal spark plugs for a given engine.

Candle design

Spark plugs are made of the same type, but often include different components, which allows you to change the technical characteristics of the spark plugs, but in general the elements included in the spark plug remain unchanged.

The candle consists of:

• The contact through which the wire and spark plug are connected;
• An insulator that allows you to maintain voltage from the ignition module without breakdown, and also protects the spark plug from overheating;
• Electrodes, central and side, between these two electrodes a spark occurs, igniting the fuel mixture;
• A ring that contracts, sealing the combustion chamber;
• Threads necessary for reliable fixation of the spark plug in the cylinder head;

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Spark plug gap

For normal operation of a car engine, it is necessary not only to have good and high-quality spark plugs, but also to have a correctly set gap between the electrodes.

The gap between the electrodes is set by bending the side electrode and measuring the distance between the central electrode using a probe.

• For VAZ 2110 injection engines, the gap between the electrodes should be - 1 mm ;
• For VAZ 2110 carburetor engines, the gap between the electrodes should be 0.7 mm ;

Choice

The choice of candles today is quite extensive. But we’ll talk about which ones are used for the VAZ 2110 and what can currently be considered the best choice for your car.

Candles differ from each other mainly in the material from which the electrodes are made.

The service life may increase or decrease depending on the care, conditions of use of the vehicle, and the quality of the fuel being poured.

Platinum candle

Differences between spark plugs for VAZ 2110

Differences in spark plugs for the VAZ 2110 depend on the type of engine. As you know, several engines were installed in the “top ten”, such as: 8-valve carburetor and injection, 16-valve injection.

For 8-valve engines, spark plugs are installed under a 21 mm spark plug head, and for 16-valve engines, under a 16 mm spark plug head. The smaller diameter of the spark plug hexagon for 16-valve engines is due to the fact that the spark plugs in this engine are installed in wells, which makes it impossible to tighten them with a 21 mm wrench.

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.

Which spark plugs are better for VAZ 2110

AU17DVRM

The original spark plugs for all VAZs are AU17DVRM. These spark plugs from the domestic manufacturer are of excellent quality and have proven themselves well in the market. AU17DVRM are an excellent alternative for replacing spark plugs, as these spark plugs have good spark formation, reliability and durability, and are also not inferior to imported analogues.

NGK No. 11

NGK spark plugs have performed well on the market and are one of the most popular spark plugs for domestic cars. Most Lada owners prefer NGK No. 11 spark plugs. These spark plugs have a long service life and high reliability.

When to change spark plugs on a 16-valve VAZ-2112?

Each spark plug manufacturer has its own schedule for periodically replacing spark plugs. However, the service life of 20-30 thousand kilometers for cars of the VAZ family is generally similar. However, if any interruptions occur during engine operation, as well as other reasons why it is necessary to replace the spark plugs, it is recommended not to delay and carry them out.

What to choose?

For the VAZ-2112 there are many different brands of spark plugs, which differ in type, composition and appearance. Therefore, what exactly to choose is up to you, and below we will tell you about each of those that are most often chosen by the owners of “two-wheelers.”

• JSC ZAZS, Russia AU17DVRM
• BERU, Germany 14FR-7DU
• CHAMPION, England RC9YC
• NGK, Japan BCPR6ES-11
• DENSO, Japan Q20TT
• BRISK, Czech Republic DR15YC
• BOSCH, Germany FR7DCU
• FINWHALE, Germany F516

Standard spark plugs that are supplied with all VAZ cars from the factory. Despite the fact that the manufacturer recommends replacing only this model of spark plugs, many car enthusiasts do not share this opinion and use other brands.

BERU 14FR-7DU spark plugs have a special modification in the form of a copper central electrode with a nickel shell. This design increases resistance to wear and corrosion. The conical shape of the skirt allows you to very quickly switch to self-cleaning mode, which has a beneficial effect when traveling short distances in the city. Thanks to the increased spark power, the fuel burns most efficiently to the maximum - and this is already tuning the ignition system and engine.

Signs of faulty spark plugs

Quite often, VAZ 2110 owners are faced with the problem of one of the spark plugs failing. Failure of a spark plug manifests itself with the following symptoms:

• The car's traction disappears;
• One of the cylinders is switched off;
• Engine vibration increases;
• Popping sounds are coming from the exhaust pipe;
• Idle speed becomes much lower than usual;
• The car jerks when driving;

If your car shows such signs of malfunction, you need to check the spark plugs or replace them with new ones.

Cleaning

If the spark plugs are dirty, then it is not at all necessary to immediately replace them with new elements of the ignition system, igniting the fuel mixture in the combustion chamber of the VAZ 2110. Regular cleaning will quickly remove the dirt and return the spark plugs to their previous functionality.

There are several common cleaning methods that can be used at service stations and in garages with your own hands.

Regardless of the chosen method, we recommend that you follow the general principles of operation when cleaning the elements of the ignition system.

1. Protect the coating of the spark plugs from abrasion; do not use rough sandpaper or other similar abrasives.
2. Do not expose the candle to high temperatures. It is not worth heating them over a fire for the purpose of cleaning. Some people do this for some reason.
3. Check the spark plug for resistance using a megometer. If the second scale does not show + infinity, then the spark plug will have to be changed. Cleaning is useless. With a value of 1000 it is also better not to try to resuscitate the element.

Now let's talk directly about cleaning methods.

Cleaning before and after

The formation of carbon deposits and flooding will require not only removing and drying the spark plugs, but also thoroughly cleaning them.

• One popular method is to remove carbon deposits with a fine-bristled wire brush;
• Another option is treatment with kerosene, which removes carbon deposits quite effectively;
• Another method involves the use of sandblasting. The effectiveness of this approach is short-term, so you will soon have to remove the candles again and clean them;
• Many people have also gotten used to using chemical converters. To do this, candles are placed in a solution, allowed to sit for about an hour, after which they are cleaned with matches, toothpicks to remove carbon deposits, washed with water and dried;
• In order not to buy specialized products, you can use acetone using the same cleaning principle;
• Our grandfathers cleaned candles with vinegar. To do this, you will need to dip them in vinegar for an hour, then add literally 5 drops of electrolyte;
• There is an ultrasonic cleaning method, but this requires specialized equipment.

If you do not get the desired result, you will have to change the candles. But first they need to be selected.

Causes

The most common of them is the incorrect operation of the car's electronic unit. What’s most interesting is that the spark plugs on the injector are filled more often in winter at subzero temperatures than in summer. And this is not an anomaly. There are objective reasons for this. As the temperature drops, mixing the fuel-air mixture becomes more difficult because a large amount of oxygen requires a large volume of gasoline in cold air. In this regard, the electronic control unit sends a signal to the fuel injectors, thereby increasing the amount of fluid supplied. This is the main reason why the candle floods.

What is happening in the engine at this moment? The injectors supply gasoline to the combustion chamber of the engine, while the starter tries to create the necessary compression in the cylinders, while at the same time trying to produce a spark to generate a flash. At the same time, we should not forget about the quality of our fuel - a lot of impurities and dirt significantly worsen the operation of the injectors, hence the corresponding troubles.

With ideal compression, the spark plugs can easily start even with a minimal impulse, but this only happens on new cars. Therefore, it fills spark plugs on the injector most often on cars more than 3-5 years old.

What to do if the engine does not start after this?

In this case, these elements should be dried. In general, the spark plugs that go into injection engines are no different from those that are installed on carburetor engines, so the method described below can be considered universally applicable.

This method consists of the following. After unscrewing, the candles are cleaned with a special metal brush to remove accumulated carbon deposits, and then dried with a regular hairdryer. Alternatively, you can hold them over the burners of your gas stove. Next, the gap is checked, and the dried spark plugs are screwed back into place. In this case, the engine will definitely start at any temperature.

Poor quality spark plugs lead to poor engine starting

If the spark plugs are not replaced within the time specified in the recommendations, nothing bad will happen, the car may simply not start.

Note. Although, if one of the spark plugs does not work well, excess fuel consumption is possible.

Therefore, it is advisable to pay special attention to the warning signs. These signs include:

Note! Self-cleaning of candles slows down the process of plaque formation. For this to happen, the temperature threshold of the lower part of the insulator cone must not be exceeded. This figure is 500-600 degrees.

Problem solving

How to fix this problem? The operating manual for modern cars says something like this: “If the spark plugs on the injector are flooded, you need to unscrew them and dry them thoroughly.” In this case, the starter must be cranked for 10-15 seconds after removing these elements. Next, the dried spark plugs are inserted back into their original place, and after that the engine starts. This is the way the car manufacturer offers us to fix the problem.

But there is another, popular, way to eliminate this problem. If you fill the spark plugs when they are cold (injector), before unscrewing and drying them, you should start the engine as follows. For injection internal combustion engines, the gas pedal is pressed to the floor all the way, the starter cranks the engine for about 10-15 seconds, then the pedal is released. In most cases, this helps to start the car. The essence of these manipulations is to blow air through the “wet” spark plugs (in this case, the fuel supply is completely shut off).