✅ Spark plug gap for VAZ Priora 16 valves

What should be the gap on the spark plugs of a 16 valve VAZ-2112

Almost every motorist has come across the concept of adjusting spark plug gaps.
Repeatedly this problem has become the cause of many troubles. Basically, malfunctions are associated with improper combustion of fuel in the cylinders, and the car may stall and consume too much fuel. The video material will tell you what the gap should be on the spark plugs of a VAZ-2112 16 valves, and will also tell you about replacing spark plugs

What a gap there must be!

Diagram of valve clearance measurement

The spark plug gap is the distance between the electrodes that are connected to produce a spark. Since the 16-valve VAZ-2112 is only an injection system, we will talk about the gap specifically for this injection system.

How to measure and correct spark plug gap

The gap between the spark plugs can be checked using a special feeler gauge, which has a corresponding plate thickness marking. It should fit a little tight, but not too much. If the probe does not fit through or the gap is too far from ideal, then it is necessary to press the metal part (upper) of the electrode against the graphite one. After this, take measurements again and so on until it is perfect.

Flat probe for measuring and changing the gap between spark plug electrodes

Of course, stores usually sell spark plugs with the gap adjusted from the factory. But, long transportation can lead to the distance between the electrodes being broken, so before installation, it is necessary to adjust the spark plug gap on all spark plugs when replacing them.

A clear example of measuring the spark plug gap using a feeler gauge

Consequences of incorrect clearance

As experience and practice show, untimely valve adjustment can lead to the following consequences:

A small gap will mean that the engine will not be able to develop sufficient power , and will also stall or have difficulty starting.
A large gap leads to greater fuel consumption . Of course, more fuel means better dynamics and traction. But, in the modern world, when everyone is struggling to save money, a consumption of 12-15 liters per 100 km will not please the owner. The second nuance is gas failures or too large jerks, which are sometimes unnecessary, especially for operation in the urban cycle.

What is the gap on the spark plugs of a car?

Let's turn to the official source, that is, the car manufacturer. But there are spark plugs, for example, with a thick and thin central electrode, with one, two or four contacts. Manufacturers have learned to make spark plugs for any specific engine of a particular car.

Defects in production are almost minimal, which means the quality of workmanship is high and there is no need to check the size of the gap again. So, if you bought a new kit at an auto store, you don’t need to do anything additional. Site menu. Advice for car enthusiasts Legal issues Interesting things about cars Tips for car maintenance Auto equipment.

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In this article we will consider the question: is it necessary to set the gap in the spark plugs when replacing them and installing new ones.

VIDEO: Spark plug gap, what it should be, how to install

And if necessary, which one? Which parameters of power and fuel consumption does it affect to a greater extent? This can cause the ignition coil to burn out - essentially shorting the output for a long time. The engine is unstable at high speeds and may even stall. Conclusion: when ordering spark plugs, use the original manufacturer’s websites, where their parameters are indicated. They need to be selected according to the car make and engine model, based on technical documentation data.

If it is specified that the gap should be 1.

How to change spark plugs on a Lada Priora - step-by-step instructions

Before installing the spark plugs, look at them visually, because they could have been damaged during transportation: the central electrode was bent or the factory clearance was broken.

Articles on the topic How to replace spark plugs in an engine with your own hands.

Tips What are cold and hot spark plugs - their differences? Flushing engine injectors - 3 most effective methods.

Life hack: spark plugs for Priora - fault diagnosis, replacement, price

When buying spark plugs for a Priora with a 16-valve engine, they usually create a reserve for themselves so that they can install a new one immediately after one of them becomes faulty. If you manage to start the car with one faulty spark plug, then failure of the remaining parts will result in the car refusing to start. In general, let’s immediately dispel the myth that 8-valve engines require some other spark plugs for a Priora car. In 16th grade, like in 8th grade, the same is given. Changing the spark plugs on a Priora is easy; in this article we will tell you how to do it, but that's all: The price of components for a Lada Priora car is not high - so I advise you to change them more often. To avoid more serious repairs. Because, having acquired carbon deposits from bad fuel, this will affect the engine by friction. Priora, like other cars, requires attention. Replacing oils and components.

Thinking about which spark plugs are best to install on a Priora, many refuse to believe in the miraculous power of analogues, installing only standard parts in their car, because the manufacturer swears that they will not harm the car. But every time a car owner sees the painfully familiar color of soot, he prepares to replace the ignition elements. I will say the following - on a Priora, a lot depends on gasoline and even driving style. It will be healthier to refuel at a good gas station, but that’s not all. You need to drive the car not only sluggishly, but sometimes give it a normal load. Moreover, it is better to do this periodically.

There is nothing difficult about changing the spark plugs in Priora yourself. This is a routine operation that is comparable to replacing headlight bulbs. It is recommended to check the gap between the electrodes from time to time. It is better to look for spark plugs for Priora in advance. When purchasing a set of elements for a Lada Priora car with 16 valves, try to compose it from the same models - so that there are no differences “in the row”.

Manufacturer's recommendations

It is unlikely that anyone will doubt which spark plugs the manufacturer will recommend for a Russian car? Naturally, domestic production. And this is natural - not always European, let’s say, refined quality can work effectively with our equipment. And so, spark plugs for Priora 16 valves must be marked - AU17DVRM. For an 8-valve engine – A17DVRM. A15DVRM are best suited for winter driving, as they are characterized by a low heat rating and, accordingly, will be easier to ignite in cold conditions.

Spark plug markings

However, many motorists choose foreign-made spark plugs for their Priora cars. Thus, the German companies BOSCH (WR7DC, FR7DCU), BERU (14R-7DU, 14FR-7DU) are very popular. The English company CHAMPION (RN9YC, RC9YC) is not far behind them. Automotive stores also have Czech ones, for example BRISK (LR15YC, DR15YC). These are high-quality, reliable spare parts, which, however, are no better or worse than domestic ones. Just a little more expensive.

Manufacturers and prices of analogues

It is not always possible to find a standard set of spark plugs for the VAZ-2170 in the nearest stores. Therefore, you can install four new parts, in accordance with the number of cylinders under the hood. The choice of elements, thanks to other manufacturers, has become more diverse:

Bosch (manufactured in: Russia) au17dvrm. Price – about 250 rubles per set;
Denso (Japan) w20epr. Price – 140 rubles per piece;
Brisk (Czech Republic) lr15yc. Four pieces – 300 rubles;
NGK (Japan) bcpr6es. One piece – 150 rubles;
NGK (Japan) bcpr6es price per unit – 200 rubles;
Bosch (Germany) fr7dcu. One piece – 100 rubles;
Lecar Kit – 230-250 rubles;
Valeo 246871. One piece – 170-180 rubles;
Beru (Germany) 14R-7DU. One piece – 140-150 rubles;
Champion (England) RN9YC. One piece – 230-250 rubles.

Replacing spark plugs for a Lada Priora car with 16 valves

To replace spark plugs on a Lada Priora car, prepare a special socket wrench with a “10” head.

Priora is a car sensitive to the gap in the spark plug, this can affect fuel consumption and traction. For 16 cl motors, a gap of 1 cm is measured by the factory. It is important to check the gap between the electrodes before installation.

This is usually checked with a round probe that looks like a coin. Of the Russian coins, only 10 kopecks more or less fit this role - their thickness is 1.25 mm. This gap will increase as the engine runs.

Remove the negative voltage from the battery, and then put the car on the handbrake so that nothing interferes with the work. Replacing spark plugs on a Priora is done in 5 steps, see them below:

remove the plastic casing;
unclip the wire block clamp, disconnect them from the ignition coil;
remove the coil mounting bolt, then pry it off with a flat screwdriver and remove it;
there is a candle in the well - this is what is needed now. Remove it using an extension cord.
put a new part in place of the old one.

When to change spark plugs

According to the technical inspection regulations, spark plugs on Priora must be replaced every 30 thousand kilometers. However, this interval is not always maintained, and they are subject to emergency replacement.

The need for replacement can be determined by engine performance. It becomes unstable at idle, the engine starts poorly, and increased fuel consumption is observed. Also, her appearance can tell about her condition. First of all, you should pay attention to burnt electrodes, both central and side. Cracks on the insulator of the central electrode are also a bad signal; chips in it should also be a warning. General sootiness indicates poor ignition, and gasoline or oil indicates its complete inoperability.

Types of spark plugs: iridium and regular

The first iridium spark plugs for cars were produced by Denso. Today they claim that such parts, unlike conventional ones, have a longer service life. We installed such parts on the Priora, but did not notice the difference - perhaps this is just a marketing ploy. We don’t think that the Priora is anything special and there will be a noticeable difference on other cars. But still in terms of technology: durability is due to the gas-tight insulation of the central electrode, aluminum oxide insulators, reduced loss of electric current, a high degree of insulation, and a large volume of the ignition zone.

Denso even produces special models for AvtoVAZ. The electrodes are coated with a lubricant mixture, which increases their gas impermeability, while the temperature in the ignition unit remains optimal - premature or late ignition is excluded. The side electrode is designed in such a way that it allows ignition to be optimized; in this case, even a lean mixture will be ignited.

You can install iridium spark plugs on the Lada Priora, the advantage of which is clear - they need to be changed much less often. But the service life of these elements will be significantly lower than that declared by the manufacturer. The fault lies not in the malfunction of the car - the quality of gasoline leaves much to be desired.

As mentioned earlier, iridium spark plugs can even light a lean mixture. When they work with a contaminated mixture (and the risk of running into unscrupulous filling remains high), they suffer even more. This is comparable to the work of the lungs of a person who lives in a non-ecological area: not only does fumes settle everywhere, the wear and tear of the “organs” accelerates.

Valve replacement of ignition elements for Lada Priora 16 valves is real. Manufacturers producing analogues for this VAZ car produce similar copies from iridium. But don’t rush to rejoice: even if you are promised that the spark plugs will last about one hundred thousand kilometers, on Russian roads this is unlikely to be true.

However, take care to ensure that the cylinder head gasket is always completely sealed against leaking oil. If oil gets on your iridium spark plugs, your expensive purchase will be rendered useless.

WHAT IS THE DIFFERENCE IN CANDLES FOR 8 AND 16 VALVE PRIORS?

As mentioned above, Priors with 8 and 16 valve engines require different spark plugs. According to the recommendations of Auto-VAZ, spark plugs for 16 valve Priora must comply with the A17DVRM standard, and for 16v engines - AU17DVRM.

In fact, the differences between them lie solely in the design features - devices labeled A17 are designed for a standard hexagon, AU17 - for a smaller one.

You can see the features of marking of domestically produced products in the image.

Features of marking spark plugs of domestic production

We change and select spark plugs for 16 and 8 valve Priora engines

Properly selected spark plugs for Priora are an essential condition for normal engine operation. The choice of spark plugs depends on what engine is installed in your car. 8 and 16-valve power units require this device with a different heating range. The heating range is the amount of thermal energy that the spark plug can conduct into the combustion chamber of the fuel mixture.

Using a spark plug with an inappropriate heating range can cause problems and engine malfunctions. For example, using an excessively “warm” one causes it to overheat and not have time to cool down to the required temperature during the operating cycle of the engine. When a new portion of fuel enters the cylinder block, premature ignition of gasoline may occur due to the high temperature of the spark plug, as a result of which the operation of the power unit will be disrupted.

Excessively “cold” igniters of the fuel mixture. operating in a temperature range of up to 400 degrees, on the contrary, are at risk of completely losing their functional properties due to the soot of burnt fuel formed on their electrodes.

SELECTING THE BEST COPY

Let's figure out which spark plugs to put on the Priora 16 valves. Many drivers agree that these ignition elements are consumables, for which there is no point in overpaying, since they will still wear out after 20-30 thousand kilometers. If you have a similar opinion, the domestically produced AU17DVRM is your choice. They are not expensive and work, in principle, quite well.

When choosing among products from foreign manufacturers, we recommend giving preference to the following companies:

Beru (standard 14FR-7DU);
NGK (BCPR6ES);
Denso (Q20PR-U11);
Bosch (FR7DCU);
BRISK (DR15YC).

The best spark plugs for a 16 valve engine, according to Prior owners, are made by the Japanese company Denso. Their iridium spark plugs on the Priora - Denso Iridium Power - have proven themselves well, and can travel for about 50-60 thousand km without any problems.

In general, the presence of an iridium electrode significantly increases the durability of the structure; moreover, iridium models retain their original characteristics throughout their entire service life.

For clarity, we present a graph of the increase in fuel consumption as different electrodes wear out.

Graph of increase in fuel consumption as different spark plug electrodes wear (iridium and conventional)

We’ve figured out which spark plugs are best for 16-valve Priora engines – let’s move on to 8-valve engines. The situation is similar for manufacturers: the best budget option is A17DVRM from our ZAZS plant.

Let us draw your attention to the fact that domestic A17DVRMs are an order of magnitude more durable and reliable than nameless Chinese ones at the same cost, so there is no need to be led by beautiful names and bright packaging.

Versions of high-quality foreign models tested by Prior owners - NGK BPR6ES and DENSO W20EPR - they are not cheap, but they are worth their price in full.

The Bosch FR7DPX Platinum also performed well. Reviews from prior drivers indicate that with them the car drives differently - the vibration in the engine disappears and the speed picks up better, and there are no problems with ignition even in severe frost.

Spark plugs for Priora: choices

The manufacturer of Priora recommends installing domestically produced spark plugs, but they can easily be replaced with foreign analogues. Let's consider the classification:

All spark plugs are divided into two-electrode and multi-electrode. Two-electrode ones have a side and a central electrode, while multi-electrode ones have one central and several side electrodes, respectively (usually 3). It is believed that multi-electrode ones have a greater lifespan and durability.

Spark plug

Spark plugs differ in Priora and by type of material. So, the standard, classic option is copper electrodes. There are also rarer materials: iridium, platinum. Thus, iridium spark plugs on Priora are characterized by a smaller diameter of the central electrode, which ranges from 0.7 to 0.4 mm, while in standard nickel spark plugs this parameter is 2.5 mm. And a completely new product is pre-chamber spark plugs, in which the body itself is given the role of electrodes.
Also, spark plugs are divided by thread diameter and size for the wrench head. Thus, spark plugs for a 16-valve Priora have a smaller thread diameter and wrench head size than spark plugs for a Priora 8-valve model.
There are also four types according to such a parameter as heat value. The heat number is the average pressure at which it is easier to heat candles during testing. So, they are distinguished by types: cold type (heat number above 20), medium type (17-20), universal type (11-20), hot (11-14).

It is not always easy to figure out such complex technical parameters on your own, because a beginner does not understand many things, for example, what is the spark plug gap on a Priora. Therefore, when deciding which spark plugs to install on a 16-valve or 8-valve Priora, it is best to turn to specialists or follow the recommendations of the car manufacturer.

Spark plug gap

REPLACEMENT PROCEDURE

Any murzilka (operation book) for VAZ cars states that spark plugs must be replaced every 30 thousand km. mileage However, in practice, even the highest quality products rarely travel 30,000 km.

The first sign that a replacement needs to be made is a change in the normal functioning of the engine. You will notice changes in its idle speed, and there will also be problems with ignition.

Unscrew them and visually inspect the electrodes. In normal condition, the electrodes are light gray in color, with a minimal amount of brown deposits allowed. During operation, the electrodes become covered with a yellow or brown coating (this is a normal condition for the middle of their service life). When the ignition elements of the fuel mixture become obsolete, black metal deposits appear on the insulator, and the electrode burns out or melts.

It is also necessary to pay attention to the spark plug gap between the insulator and the electrode (ideally for Priora it should be 1.1 mm, which is indicated in the service book). The gap increases during operation, so if a check shows that the gap is 2-3 millimeters larger than it was originally, the spark plug needs to be replaced.

The gap can be adjusted by simply bending or pressing the electrode against the insulator, but this can only be done normally on new spark plugs; when worn, the electrode, as a rule, becomes very fragile and crumbles under rough influence.

In the image below you can see the stages of spark plug wear.

Stages of spark plug wear

If the electrode is intact, you can try to revive the product; to do this, you need to anneal the deposit on the electrode with a gas burner and, after it has softened, remove it with a metal brush. This must be done carefully so as not to damage the fragile structure.

Now let’s figure out how to replace spark plugs on a 16 valve Priora. To do this you will need a spark plug wrench, a screwdriver and a 10mm socket wrench to unscrew the coils.

Everything is done according to the following algorithm:

Open the hood and remove the plastic protective cover from the engine;
We remove the power wire from the ignition coils and unscrew the bolts that secure them;
We pry up the coils with a flat screwdriver and take them out;
We take a special key and unscrew the spark plugs. This may not be so easy to do, since high temperatures may cause the shrink thread to stick to the body of the part. Unscrew it carefully so as not to damage the structure, since removing fragments of insulator from the well is an extremely problematic task. If you have a compressor at hand, blow out the shrinkage well to remove dust and contaminants accumulated in it;
We check the condition. If it is damaged or extremely worn, we install a new one. We insert the spark plug into the magnetic head of the key and screw it back in. There is no need to make any effort here - the thread should go smoothly, and after the body is held tightly in the seat, you need to tighten the thread with light force;
All that remains is to install the coils in place and connect power to them.

Lada Priora - replacing spark plugs

Spark plugs do not always require complete replacement. Sometimes they can be annealed, which will return it to working condition. After this, clean with a soft steel brush to remove any remaining carbon deposits. Experienced motorists are advised to purchase a special gun to check the performance of spark plugs. This device can detect a defect in the spark breaking through to the spark plug body, or the spark wandering along the side electrode. But if, nevertheless, it is necessary to change the spark plug, then a certain procedure should be followed.

The first thing you need to do is remove the plastic casing from the engine block.
Then the mounting bolts of each coil are unscrewed, after which they can be removed using a flat-head screwdriver.
Next, the candles are unscrewed one at a time.
Since the spark plug is located in a recess, you will need a special long spark plug wrench to unscrew it.
Unscrewing a candle requires some effort, because high temperatures create a sticking effect on the thread.
Care must be taken as excessive force may damage the spark plug insulator. Removing the fragments will not be easy, and if they get into the cylinder, a labor-intensive operation will follow to disassemble the entire block.
After the candle has been removed, you need to carefully examine it. You should be alert to burnt electrodes, traces of gasoline and oil, mechanical defects in the insulator, and large deposits on the body. The condition of the candle is important not only in itself. It may also indicate the condition of the engine. So it is important not to neglect the opportunity to make a “diagnosis” of your motor.
A new spark plug is inserted into the head and then installed in place. Its twisting, on the contrary, should not take place with effort. Inaccurate movements can easily damage the threads of the cylinder head, which will require expensive repairs.
After the candles are in place, you need to carefully tighten them with a knob.
All other procedures are carried out in reverse order.

When faced with the need to replace spark plugs on a Priora for the first time, it is advisable to do this under the guidance of an experienced person. However, this procedure does not contain anything particularly complicated. As a last resort, you can watch the replacement of spark plugs on a Priora 16 valve video.

After all, it is always better to see once than to read several times.

Spark plug gap VAZ Priora 16 valves

Finval, gaps and correction

I professionally diagnose ignition and injection systems, so I was looking forward to testing the spark plugs. What is the result of the AP test? 22, 2004 ?staff? candles from Engels lost? not surprised. Although I noticed that the factory-fitted spark plugs and those sold in the store are very different. But the fact that Finwhale candles were among the leaders? stunned! Our experience of ?communication? with these candles indicates that they do not work well. Maybe they sell different Finwhale in Taganrog and Moscow?

There are also comments on the content of the article. Why do some of your spark plugs have a gap of 0.8 mm, and others? 1 mm? For the VAZ-2111 engine (as you correctly noted on page 60), the gap should be 1 mm. It turns out that some of the results are incorrect? Why do you claim that injection timing correction based on signals from the oxygen sensor is short-term and is needed only in transient conditions? It seemed to me that just the opposite, correction “by lambda?” needed in steady-state conditions (except for the enrichment mode at a load close to maximum). Maybe I'm wrong about something? I will be glad if you correct it.

Andrey Oleynik, Taganrog

AR: According to official information, the founder of the newly formed Finwhale company is the German holding Grunntech GmbH, which orders the production of spare parts from other manufacturers. We know for sure that Finwhale spark plugs are now produced at the factories of Bosch in Germany and Brisk in the Czech Republic (only German origin is indicated on all packaging). It is possible that this circumstance may explain such polar assessments of candles of this brand. We know nothing about other factories where Finwhale candles can be produced.

A spark gap of 1 mm is recommended by VAZ only for spark plugs that are installed on a conveyor? in our case it is EZ A17DVRM. Are the gaps and applicability of other spark plugs determined by the spark plug manufacturer himself? for example, Brisk recommends the LR15YC model with a gap of 0.8 mm for the VAZ-2111 engine. And the Eyquem spark plugs came with a sign requiring the gap to be set to 0.8 mm.

We were not clear about the correction. Of course, the lambda probe optimizes the mixture composition in steady state conditions. At the same time, he plays a supporting role, “sharpening” fuel and air ratio for efficient operation of the converter. But in the case of Bosch WR7DCX spark plugs, missing flashes caused the lambda probe to record too “poor” conditions. mixture and require constant enrichment from the controller, which negatively affected engine performance.

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

Before replacing the spark plugs on their car, most car enthusiasts ask themselves the question, which spark plugs are best to choose? Fortunately, there are many of them in stores. In our article we will tell you in detail how to approach this issue competently, focusing on the choice of the majority of car owners.

The video provides an overview of popular spark plug models for the VAZ-2112:

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

Spark plugs from ZAZS.

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.

Spark plugs from BERU.

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.