Which engine does not bend the valve on the VAZ 2110. The valve is bent: what is the reason and what to do about it

Car owners faced the problem of valve bending even on the first G8 models. The engine installed on them, with a volume of 1300 cc, bent the valve when the belt broke.

This problem is associated with several reasons, such as jamming of the pump and tension rollers, wear or poor manufacturing of the timing belt (timing).

At the moment the timing belt breaks, the camshaft stops in the position in which the breakage occurred, and the crankshaft, continuing to rotate, pushes the pistons towards the open valves. As a result, they collide, leading to damage to valves and pistons.

In such a collision, it can damage not only the pistons, but also the cylinder walls and connecting rods. In this case, car repairs will be very costly and time consuming.

On some types of engines of VAZ cars, this was avoided. In such engines, special recesses for the valves are molded on the pistons, so if the belt breaks, a collision does not occur.

Several types of engines were installed on the Lada. Let's look at which of them are dangerous and which are safe and why the valve bends on Kalina when the belt breaks.

Types of engines affected by this problem

1. The eight-valve, model 21116, with a volume of 1.6 liters, is equipped with a lightweight piston group. Due to the lightening, the pistons became very thin and there was simply no room left for the valve casting. When such pistons collide with a valve, the entire piston group usually suffers.
2. The sixteen-valve, model 21126, with a volume of 1.6 liters, is installed on the more expensive Kalina class of cars. On this engine, piston-valve collision is also inevitable.
3. The sixteen-valve, model 11194, with a volume of 1.4 liters, is one of the most economical, but, unfortunately, it is also susceptible to this problem.
4. Sixteen-valve, model 21127, with a volume of 1.6 liters. This is a new engine based on the previous model 21126. Installed recently. It is more powerful, but it also remains on our list of "dangerous".

Engine types not affected by this problem

1. The sixteen-valve, model 21124, with a volume of 1.6 liters, is considered one of the most reliable. Installed on the twelfth model of the Zhiguli. With this engine, you will not have any problems with the gas distribution mechanism.
2. Eight valve, model 11183, 1.6 liter, proven engine, distinguished by its reliability, ease of maintenance and availability of spare parts. Also falls into the category of safe.

A few tips on how not to find out if the valve is bending on Kalina and not to get expensive repairs

In order to try to avoid damage to the gas distribution mechanisms, it is necessary to replace the timing belt in a timely manner.

It is not enough to change one belt. Be sure to change the tension rollers with it and monitor the condition of the pump. If necessary, it must also be replaced.

In no case do not skimp on spare parts. Choose your timing belt carefully. It should not have any irregularities, stripes or seams.

When buying a water pump and idler rollers, choose only well-known and trusted manufacturers.

Observing these simple rules, you will never know whether the valve bends on the Kalina car, and how much the engine bulkhead costs.

Hopefully, this article will help you avoid problems, usually associated with an oversight of the technical condition of the car. With the right attitude to the operation of the elements of the gas distribution mechanism, such problems should not arise.

One of the scary topics in the conversations of motorists is why the valves bend, on which cars this breakdown is possible, and how to prevent it. Today we will tell you in detail about the reasons why the engine valve fails and the preventive measures for this malfunction.

What are the valves in the motor responsible for?

First, a little theory. Surely every car enthusiast knows how many cylinders there are in the engine of his car, but how many valves it contains - not everyone will give an answer to this question. In most modern engines, there are from eight to sixteen valves (two or four per cylinder), there are power plants (eight or twelve-cylinder), in which the number of valves is from 24 to 32.

The valve is an important part of the gas distribution mechanism (timing) of the engine of the machine, which is located in the cylinder head, is responsible for the timely supply of air to the cylinder and the displacement of exhaust gas from it.

Moreover, one and the same valve cannot perform these functions, and therefore each cylinder is equipped with two types of valves - intake valves, which supply air to the combustion chamber, and exhaust valves, which squeeze out the combustion products of the air-fuel mixture from this chamber.

There are engines in which there are two exhaust and intake valves per cylinder, and there are those with more intake valves than exhaust valves (three and five-valve cylinders). In the structure of the valve, two parts are distinguished: a plate and a stem. It is the valve stem that gets hit when one of the elements of the gas distribution mechanism fails.

The valves are brought into operation by the camshaft, which, rotating around its axis in the cylinder head, raises some and lowers other valves into the cylinders - these are the so-called gas distribution phases. In turn, the camshaft drives the crankshaft - both of these timing elements are interconnected by a drive, which can be a toothed, belt or chain drive. A gear drive rotates the camshaft in the cylinder block, and a belt or chain drive rotates in the cylinder head.

Currently, the most widespread are engines, in the gas distribution mechanism of which they are used. The belt drive type is simpler in design, but less reliable than the chain drive. The chain type of drive, in turn, is more complicated - its mechanism includes tension rollers and dampers. It is no coincidence that we paid so much attention to the details of the gas distribution mechanism - understanding the principle of its operation will help us in the future to determine the reasons why the valve bends.

Why valves bend

For both a belt-driven gas distribution mechanism and a chain-driven timing mechanism, there may come a moment when a belt or chain drive fails. A break in the timing belt or stretching of the timing chain links that are unable to catch on the teeth of the camshaft gears (slipping) leads to the fact that the camshaft stops abruptly, and the crankshaft continues to move.

At this moment, the valves are recessed into the cylinder, and the piston rises towards them. The lifting force of the piston is much greater than that of descending valves, so the piston hits the valve disc, and the rod, unable to withstand this impact, bends or even breaks. There is a complete stop of the engine, which is not recommended to start again, so as not to provoke more serious damage - failure of the pistons, which is fraught with expensive repairs to the cylinder head.

How to tell if the valves are bent

It is impossible to establish by eye that when the belt breaks or the timing chain slips, the valve is bent. To do this, you need to carry out two simple operations.

To begin with, we will install a new timing belt on the rollers according to the marks and slowly turn the crankshaft. Two to five revolutions are enough to determine that the valves are bent: if the rotation is free, then the valve stems are intact, if it is difficult, the valves are bent.

It so happens that the crankshaft turns, but the valves are still bent. How, in this case, to determine the breakdown? It is necessary to measure, having previously unscrewed the spark plugs. If there is no compression in the cylinder, the valves are bent.

How to prevent valve breakage

Let's analyze the reasons why the belt could break in order to understand how to prevent such a breakdown.

Cause 1. The timing belt has expired. Like any other consumable, the timing belt has its own service life. The car manufacturer in the operating manual indicates the timing of the timing belt replacement - for most engines, it occurs with a mileage of 100-120 thousand kilometers. It is certainly possible to hope that until this moment the belt will serve faithfully, of course, but for greater fidelity, we recommend that at each scheduled maintenance inspect the condition of the belt and, if necessary, replace it. In this case, we will not allow it to break, and, as a result, we will not disentangle the problems with bent valves.

Reason 2. Using a counterfeit timing belt. Some motorists, wanting to save money, buy non-original, cheap timing belts, which break at low mileage - 5-7 thousand kilometers. Advice - be responsible for buying a timing belt, it is better to pay more for this consumable than to fork out for expensive cylinder head repairs later.

Reason 3. Breakdown of the timing pump. In the design of the gas distribution mechanism of some engines, the pump comes into contact with the belt, and if this unit fails, it jams, as a result of which the belt rubs against the pump and frays, which leads to its breakage. The pump wears out at the same mileage as the timing belt, therefore, when replacing the belt, we recommend installing a new pump.

Cause 4. Camshaft wear. This breakdown occurs at high engine mileage (from 150 thousand km or more), and therefore does not occur so often. A jammed camshaft can cause the timing belt to burst. That is why when buying a used car with high mileage, we strongly advise you to take a look at the condition of the camshaft.

Cause 5. Malfunction of the timing drive attachment. The timing belt moves on rollers, which can also wear out, jam, which leads to the belt breaking and the valves being bent.

Although engines with a timing chain drive are considered more reliable, it happens that they also have valve bending. This happens for two reasons: the chain links are stretched or the drive attachments (idler rollers and dampers) fail. The main reason why the timing chain links stretch is the poor quality material from which it is made. Such a misfortune happened to Volkswagen engines in the mid-2000s: the German automaker ordered chains from an unscrupulous contractor, and they began to fail at 20-40 thousand mileage, provoking bending of the valves. To prevent such motors from bending the valve, you should periodically diagnose the timing chain and attachments and, if necessary, change them to new ones.

In addition to these methods, it is possible to prevent bending of the valves by making special recesses on the piston heads, which will correspond in size to the valve stems. If a belt breaks or a chain slips through, then when the camshaft stops, the valve rods will not bite into the piston heads, but will enter the grooves and stop there. True, this method also has its drawbacks: an engine with such "tuned" pistons loses up to seven percent of its power. Are you ready to derate the motor of your "iron horse" for the sake of the safety of the valves in case of failure of the timing drive?

Once I wrote about the engines "PRIORA", I was asked - "", read it very informative. In this article, I promised to talk about the very principle of why this happens on some engines, but not on others. In general, about the breakdown process itself, today I will try to sort everything out on the shelves, just for you "beginners". I will not delay, let's go ...

So the valve is part G azorasp R a separate m car mechanism (timing). It should be noted that the part is quite important, without them there would be no release of exhaust gases, and compression in the cylinders would not be created during fuel injection and ignition. In modern engines, their number varies from 8 to 32. But in most, variants with are used, they are the most common of all.

Principle of operation

"Makes" them work to open and close the camshaft, which is located on top, in the head of the block.

It spins up and, thanks to special ovals, presses on the valve - it opens, or releases it - it closes. In turn, the camshaft runs on a belt or chain drive from the crankshaft.

The distribution and the crankshaft are necessarily synchronized so that the opening of the valves and the movement of the piston coincide in a certain sequence - when the piston goes down, the valves open ("sink" into the chamber), when the piston rises up, they close (go up), thus creating pressure in the combustion chamber, then the candles ignite the mixture and the piston goes down under pressure. This cycle is repeated many times. Here is a short video clip of work for understanding.

This is a perfectly working scheme, with proper maintenance (timely replacement) everything will travel many thousands of kilometers.

The reason why the valve bends

I would like to note that it can be on both 8 and 16 valve engines. The reason is simple - it is a broken timing belt or chain. For the sake of fairness, it is worth noting that the "chain" very rarely breaks, it basically stretches out and the "hook" stars begin to jump, which can also be the reason.

When a break occurs, the camshaft stops abruptly, but the crankshaft continues to push the pistons. Thus, the valves are lowered and "drowned" into the combustion chamber, the piston also goes up - which should not be the case during normal operation. They meet at the "high point" and the piston, possessing high energy, simply bends or breaks the valve. As you can see, everything is quite commonplace.

Such a breakdown is very expensive - you need to "half" the motor and pull out the bent elements, sometimes even the block head itself suffers (but rarely), so it will also need to be changed. You can also find damage to the pistons (the valve breaks it), but here it is even more serious, it will be necessary to remove the camshaft and pistons with "connecting rods".

Why does the belt tear and how to protect yourself from it

1) The most common reason is simply not following the manufacturer's instructions for replacing the belt. As a rule, if your car is under warranty, then the replacement will be under warranty, but if you service it yourself, then many people forget or save on replacement. It "comes out" sideways.

2) Poor-quality belt, now there are just a lot of fakes, especially for our VAZ. In fact, they don't even walk 5,000 kilometers (they were in a company car several times), so take the best proven options. Or change to a service station with a guarantee.

3) The pump fails. In some car models, it is also in the engagement of the belt and if it fails, then it will simply wedge, it will wipe the belt in a matter of hours.

4) The camshaft itself wears out. It is made of metal and it is clear that after some time it will wear out (it can jam), although a very long time must pass (high mileage).

5) Timing system tension rollers fail. They can fall off, they can get jammed - in any case, the belt will either break, or it will fly off - there is one end, the valve will bend.

The guys are only protected here. Change the belt in time, as well as the tension rollers and other elements of this system that are assigned to you according to the regulations. Take "consumables" at official or verified store stations, because fakes are sold much less than originals, here you risk every thousand kilometers, in general, a belt is not a spare part that is worth saving on.

Are there options that don't bend?

Of course there is, but now they are very rare. Once again I advise you - there are models of motors that have not been "bent" before. However, unfortunately, there are practically no such people now. Therefore, many are doing - such tuning of power units.

The essence here is also banal, simple - instead of conventional pistons, they are installed. Then, even if a break occurs, the valves will simply fall into these pits and nothing terrible will happen. You will need to install a new belt and synchronize the camshafts and crankshafts.

“Great,” you say. BUT why, then, such pistons are not put on all models? After all, this is 100% protection.

Again, everything is simple - such pistons consume part of the engine's power, and decently. There are still debates about "how much." Some say that by about 5 - 7%, and excuse me, this is GREAT! The thing is that such a piston is heavier, and the compression is not as effective. That is why many have rejected this decision. Many - but not all!

In the fall of 2015, the LAD family of cars was supplemented by the top model - the Vesta car, produced in the sedan body. When asking the question "does the valve bend on the Lada Vesta", you need to clearly imagine what kind of engine we are talking about: about a 1.6-liter Russian or Nissan, or maybe about the latest VAZ development with the name "21179".

Here options are considered that are related to cars that are being produced now or those that will begin to be produced in the near future. Also, an 8-valve engine was developed for Vesta - it definitely does not bend the valves and will definitely not be installed on top sedans in 2016.

Read more about the engines that the Lada Vesta line is equipped with in the material: !

ICE VAZ-21129, 106 "forces" (valve bends)

Under the hood of a 106-strong Lada Vesta

A bit of history. Motor 21129 is a modified version of another engine, namely, 21127. The last of them, when the timing belt broke, successfully bent its valves, although grooves were made on the pistons (Fig. 1). The point is that the depth of the grooves was not sufficient: when certain conditions were met, the valve "met" the piston with all the ensuing consequences.

With the transition to a new generation of internal combustion engines, that is, to 21129, the design of the pistons was finalized. But the external shape has not changed much, and although the notches remain, their depth is still insufficient.

Here the question was considered whether the Lada Vesta valve with the "21129" engine is bending. And the answer was unequivocal: yes, oppression.

In theory, the problem with valve bending is typical for all VAZ engines equipped with 4 valves per cylinder. Each new 16-valve "inherits" it. An exception is one rarity - the VAZ-2112 internal combustion engine, the volume of which is 1.6 liters. There, the notches were made to the fullest (Fig. 2).

122-strong motor "21179" (valve bends)

By its design, the VAZ-21179 internal combustion engine does not differ much from its predecessors. The working volume was increased to 1774 ml, which was achieved by changing the length of the piston stroke: from 75.6 mm to 84.0 mm.

Elements of the connecting rod-piston group

The piston itself is now fitted to the cylinder better than in the 21127 and 21129 engines. The distance from the piston pin to the piston crown has increased by 1.3 mm to 26.7 mm. But deeper grooves in the bottom did not appear. The timing mechanism still drives the belt, and when it breaks, no one canceled the ability to bend the valves.

Now we know if the valves are pressed on the Lada Vesta with a 1.8-liter engine. The answer will be the same as for all 16-valve VAZ internal combustion engines (with the exception of 2112). The problem with the transition to a new generation remains the same. And they do not intend to return to the "heavy" pistons at the VAZ.

The timing drive on 21179 engines is equipped with not one, but two tension rollers. What has been done so that the structure is less susceptible to tension in the timing belt.

It says here: the number of idler rollers is two

One of the automatic tensioning machines can jam, but then the second automatic roller will take over its function.

Pistons that do not bend the valve

Piston kits for some "old" 16-valve valves are available from third parties. These parts are supplied with deep grooves. The point is that the piston does not reach the plates and cannot bend the valves.

Tuning piston for internal combustion engine 21126-21127

ShPG elements of different engines (21127, 21129, 21179) are compatible. But it is not necessary to install pistons from "old engines" into Vesta's engine:

• In the internal combustion engine 21129 after such "tuning" the friction losses will increase;
• If the pistons from the 26th or 27th engine are installed in the ICE 21179, the working volume will immediately change.

"29th", as well as "79th" engine Lada Vesta bends valves only with "VAZ" pistons. But after installing a "tuning" part, do not expect an increase in power. And also, using non-standard elements, you can greatly reduce the resource (lose the warranty, get unforeseen consequences).

Nissan HR16DE engine (not oppression, there is a chain)

Disassembled HR16DE engine

No "deep grooves" are provided here. Now let's pay attention to how the timing mechanism works.

Nothing but gears and chains

There is no toothed belt here - it is replaced by a chain. It is difficult to imagine the following two situations:

• The chain could jump over the teeth of one or more gears;
• One of the elements was damaged so badly that the damage caused it to rupture.

As long as the chain remains intact, valves and pistons cannot meet each other, no matter what happens to the engine. The only bad thing is that the chain can jam.

Is the Lada Vesta valve bending with a Nissan ICE? The answer "no" would be wrong - breaking the circuit is not ruled out. But in reality, it will be almost impossible to face such a situation. Let's see why.

Four well-known facts

The resource indicator for the timing chain always exceeds the engine life. This is the first fact, but the condition must be fulfilled: the oil change must be timely. In general, the chain breaks down gradually, and this is accompanied by symptoms:

• Audible overtones (chirping) at idle;
• At the moment of passing the "problem area", a phase shift may be observed.

The last defect is detected using computer diagnostics.

It takes a certain amount of time from the appearance of any symptom to the complete breaking of the circuit. And in general, a "defective circuit" can work for a long time. This was another, fourth fact.

The consequences of a broken timing belt, an example in the video

Firstly, the contingent of owners and service workers consisted of people from the southern republics who are actively helping us to live in central Russia. Some treat them without any suspicion, because the fame of honest, friendly and hardworking people is firmly attached to them. Don't you agree ???
Secondly, I can't imagine how you can catch a tow truck on the Moscow Ring Road at 7 am on the road (without calling it in advance by phone).
However, for some reason, many people avoid dealing with such services.
But the continuation of the history of codeforfood for some reason did not finish.
Somewhere he will correct me, but from his words everything looked like this:
the next day he received a call from the service and was told that they had carried out a diagnosis. It was reported that the valve was bent and, as a result, the engine was to be overhauled (50-70 thousand).
Since we mainly service our cars with one reliable and experienced master-private trader, Uncle Kolya (who specializes in engines), he decided to pick up the car and consult with him. We, as naive people, discussed all this in his topic and did not understand why he didn’t do it right away or didn’t take the car to his yard.
It was expensive to call a tow truck, and he came with friends in another car to tow the broken car with it.
Roughly such a picture appeared before his eyes: the engine was disassembled, removed (damn it, but in general it is difficult to pull it out without special equipment, and if the bridge interferes from below, then it is pulled over the top) and was lying in the trunk. They demanded 8000 rubles for the "diagnostics" (!!!). To do this, you do not need to remove the engine, disassemble it, Uncle Kolya would diagnose it for a maximum of 500-1000 rubles. I had to pay and tow the car to the house.
What was 9000 rubles paid for? For simply being told: "the valve is bent" and the engine disassembled? What the fuck is it to disassemble and pull out for this? It became clear to me that this is pure divorce. Maybe the valve is not bent there at all (on some types of cars this does not happen when the timing belt breaks). We will soon find out.
But unexpectedly, from a friend of mine at work, I learned his story, which is like two peas in a pod similar to the story of codeforfood.
His uncle is a very experienced person in the auto repair business. His friend (by the way, an Armenian) called my uncle and said that he was being bred in a service in Anino and needed help. Uncle told him if he was a normal person, that he went to this service, as he had a very bad reputation.
The scheme is about the same. He was standing on the Moscow Ring Road, a tow truck picked him up and offered to take him to the service in Anino. They insisted that he leave the car for the night (like we are already closing), in the morning they called him and said that something needs to be replaced - the price is 10,000 rubles. When he arrived to see the car, the engine was already disassembled and lay in the trunk (damn, what kind of style is that - to disassemble the engine and put it in the trunk). He agreed. Then they called him the next day and said that they had identified some other malfunction. The total price will be 35,000 rubles. When he came to pick up the car, it turned out that he owed 35 thousand plus 10 thousand, and if he did not agree, then the engine had to be assembled, and that would also cost money. In short, the pumping out of money began. After that there was a call to a friend, a support group of 5 people arrived, a difficult conversation took place, the car was returned with an apology, while trying to get out of the situation "nicely" - like in the movie "Boomer", when the main characters meet and disagree with the local group.
My uncle told my friend that this service is "razvodilovskiy". It looks decent, but they are not doing repairs there, but by bugging, sabotaging and siphoning money. There is also something like a car market, a spare parts market, etc.
The scheme is simple - their tow truck runs along the Moscow Ring Road in this area, notices cars standing on the side of the road and convinces their owners to take the car to this service. Then what I wrote above begins. I'll find out the exact address later, leaving it through a gas station. There is a fairly large service, but it belongs to people from the same republics and the scheme of work there is also the same.
A little googled "car service in Anino" and came across similar stories.
Be vigilant, do not let yourself be screwed. In such places, not a foot. Don't feed these devils.
reviews on the internet
http://www.aremont.ru/services/varshavskii_tehcentr.html?allcomments
http://avtotochki.ru/poi/view/97755328853/
http://avtotochki.ru/poi-review/view/9090908883/
http://avtotochki.ru/poi-review/view/1460269326873/
http://www.superstor.ru/index.php/component/joobb/topic/167-

My affiliate program on YouTube www.join.quizgroup.com?ref=394657 To develop the webmoney channel - R165845645491 ...

With what I congratulate you, in fact, those who have a working day tomorrow are unlucky. ... which cars, or rather the engines of which cars do not bend the valve when it breaks. .... Golf 3 1.8 AAM volume, they say it is not oppression, I did not check it myself, the timing belt is on ...

On what machines with what engine does the valve not bend when the timing belt breaks, just put a new one and flopped on? | Thread Starter: Raisa

Valeria On all 16-valve motors of domestic production, the valve bends when the timing belt breaks

Yaroslav engines that do not bend: 11113,21083,21124,11183 and a very small amount of 21120
engines on which it bends: 11111,21080,21081,21120,11194,21126. With the exception of a small amount of 21120Love on all these engines, the valve and piston meet when the timing belt breaks. The number of bent valves depends on the luck of the owner. There were cases from 2 to 16.

Polina toyota gasoline with 5 a engine

Alexey Natalya) vaz: 8cl. 1.5l .; vaz: 16cl. 1.6l. nexia 8kl. 1.5L vaz 2105. ford sierra.

Boris S3 Toyota engine

Sasha TOYOTA drive your dream)

Zoya Valve bends on all modern motors. Our 16-ticlops are lucky, 1.5 16we bends 100%

Arthur In any case, I would not check ... even knowing that it should not bend.
After all, the belt will break 100% at night, on a business trip or with your family on the highway, when overtaking and as far as possible from the village. And the temperature will be -25..30 overboard.

Artem bends everywhere on modern 16-valve, because of getting the maximum engine power. what difference does oppression not oppress? if you follow the timing belt, then problems will not wake up, and even more so if you buy a foreign car, this topic is not relevant as at ease.

Dmitry 2109 1.5 engine.

Alexander Regulate the Valve and will not bend it.

Oksana Tavria, ZAZ CHANCE with 1.3L is not oppressive

On which cars does the valve not bend? - Forums about cars in Russia ...

May 25, 2013 - Dear members of the forum, I would like to learn more about such a problem as bent valves when the timing belt breaks. What cars ... [No flooding] Is the valve bending when the timing belt breaks on the D17A ...