As I wrote about the "Priors" engines, I was asked - "", read very informative. In this article, I promised to tell about the principle of principle why this is happening on some engines, and there are no others. In general, about the process of breakage, today I will try to decompose everything around the shelves, it is for you "newcomers." I will not pull drove ...
So, the valve is part g.azorasp rengineering m.car Ehanism (timing). It should be noted that the part is quite important, without them there would be no release of exhaust gases, as well as compression in cylinders during injection and fuel ignition would be created. In modern engines, their different quantities from 8 to 32. But most of the options are used, they are the most common of all.
Principle of operation
"Makes" to work and close the camshaft, which is located on top, in the block head.
It is spinning and thanks to special ovals clicks on the valve - it opens, or releases it - it closes. In turn, the camshaft operates on a belt or chain transmission from the crankshaft.
The distribution and crankshaft must be synchronized so that the opening of the valves and the piston movement coincide in a specific sequence - when the piston goes down, the valve opens ("litter" into the chamber) when the piston rises up, they close (go up), thus the pressure is created in The combustion chamber, the candles come on the mixture and the piston under pressure goes down. This cycle repeats many times. Here is a small video clip of work for understanding.
This is an ideal scheme, with due maintenance (timely replacement) everything will go many thousands of kilometers.
The reason why valve
I would like to note that it can be both on 8 and on the 16 valve engine. The reason is simple - this is a belt break or timing chain. Justice for the sake of, it is worth noting - that the "chain" is very rarely torn, mainly it is drawn up and "hooked" asterisks begin to jump, which may also be the cause.
When a break occurs - the distribution shaft stops sharply, but the crankshaft all continues to push the pistons. Thus, the valves are lowered "rubbed" into the combustion chamber, the piston also goes up - which should not be at normal operation. They are found in the "top point" and piston, possessing high energy, just blowing or breaks the valve. As you can see everything is quite trite.
Such a breakdown is very expensive - you need to "half" the motor and pull out the curved elements, sometimes even the head of the block (but rarely) suffers, so it will also need to be changed. You can meet and damage the pistons (the valve punches it), and then it is still more serious, you will need to remove the camshaft and pistons with the "rods".
Why tear belt and how to protect yourself
1) The most common cause is trite not compliance with the prescription to replace the belt from the manufacturer. As a rule, if the car you have a warranty, then the replacement will be under warranty, but if you serve it yourself, many forget or save on replacing. It "gets out" sideways.
2) A poor-quality belt, now just a row fakes especially for our VAZ. Really do not go 5,000 kilometers (several times on the service machine), so take better proven options. Or change one hundred with a guarantee.
3) Completes the pump. In some models of the car, it is also in the gearing of the belt and if it fails, it is simply clinically clinically, it is in a matter of hours protretted belt.
4) Rapreded himself wear out. It is made of metal and it is clear that after some time it is to wear it (it can bother), although it should pass a lot of time (big mileage).
5) fails of tension rollers of the timing rollers. They can fall off, they can jammed them - in any case, the belt either tears, or it flies - the end one, the valve will run.
Protection guys here alone. Change the belt on time, as well as tensioning rollers and other elements of this system that are attributed to you by regulations. Take on official or proven stations-stores "consumables", because the fakes go much less than the originals, here you risk each thousand kilometers, in general the belt is not the spare part on which it is worth saving.
Are there any options that do not bend?
Of course there is, but now it is very rare. I advise you again -, there are models of motors, which used to be "not". However, unfortunately now there are practically no such. Therefore, many are carried out - such tuning of power units.
The essence here is also trite, simple - instead of ordinary pistons put. Then even if the cliff happens, the valve will simply be devastated to these pits and nothing terrible will happen. It will be necessary to put a new belt and synchronize the distribution and crankshaft.
"Great" - tell me. But why then such pistons do not put on all models? After all, it is 100% defense.
Again, everything is simple - such pistons eat part of the engine power, and decently. There are still disputes "how much." Some say that about 5 - 7%, and this excuse me - it is happening! The thing is that such a piston is heavier, and the compression is not so effective. That is why many have refused such a decision. Many - but not all!
The automotive industry knows thousands of versions of engines that have a not too pleasant design for operation. In particular, on such power units when the timing belt breaks down valves, which are encountered with pistons in a chaotic inertial course. The bend of the valves will have to be treated with a replacement, as well as the bulkhead of the entire upper part of the engine. This will cost the owner of even an inexpensive domestic car more than 15,000 rubles. Therefore, if there is such a possibility, it is better to choose the power units in which the valve during the belt break is not bent. Today we will look at the domestic development in the field of engines for cars. It turns out that in this plan engines on domestic cars were quite adequate. Many of them did not know such a problem as a curved valve in various problems.
AvtoVAZ generally designed fairly interesting power units. Yes, most of them have not such a great potential and consumed a lot of fuel. But in fact it turned out that the engines did not require any care at all. They simply served for years without causing any problems and negative situations. In many units, even the oil was not changed, pouring once at 30-40 thousand cheap mineral water, which could get during the Soviet Union. So scold engines of the first models of VAZ, right up to the VAZ 2108 and 2109, not worth it. It turns out that it was the best time of the domestic auto industry, which showed maximum potential and minimum problems in use.
VAZ engines from 2101 to 2106
Often in old cars VAZ used the most simple technologies. The development of the 70s of the last century served in fact until recently, because the last version of 2106 was removed from production just a few years ago. It is very interesting that on the entire range of these cars stood engines that received many important advantages in operation:
- the power units had often 8 valves, as well as places for their folding in case of problems;
- the belt or the timing chain was quite high-quality, walked 50-60 thousand kilometers (or more than 200 in the case of a chain);
- engines worked in all weather conditions without problems, received many positive responses of experts;
- some export cars have become popular in the very civilized countries of the world.
At the time of the development of each of the VAZ cars in the range of 2101 - 2106, the transport was just amazingly good. Even today, after 40 years from the release of some models, it can be found on the secondary car market with such engines that will never fit the valve, and other problems of the power unit are not terrible. These features of the old developments of VAZ.
VAZ 2107 engines with timing chain
Most of the power units of VAZ 2107, including all the latest modifications of the engines, have special timing chains that are quite adequately serve and do not fail. You can drive on one chain of about 200-250 thousand kilometers, then replaced it simply because the conscience of the motorist began to remind of maintenance.
It is important to remember that if the chain began to issue some unpleasant sounds, it should be changed at that very moment. But even if the chain breaks, most modifications of the VAZ 2107 engine will not cause the valve bending. Therefore, the owner of this car can be completely calm for the safety of the engine of his car.
VAZ 2108 and VAZ 2109 - a whole era in Russia
The hatchbacks, which in the people called "chisels", received the fame of reliable and hardy cars, they were produced up to our time, several years were going to Ukraine, but had already completely lost the relevance of appearance and technology. Today you can buy an excellent version of "nines" on the secondary market is quite fresh year of release in perfect condition. The engine in this machine has features:
- there were a power unit on 1.1, 1.3 and 1.5 liters with a carburetor, as well as a 1.5-liter injection unit;
- all engines were protected from the influence of the gap of the timing belt, the valve in the power unit was not bent;
- the car possessed quite adequate reliability of the engines - this node broke in the car last;
- all presented competitors at one time were broadcast by advanced design, excellent comfort and other benefits.
At the very beginning of its production, VAZ 2109 and 2108 cars were a real revolution in the domestic automotive industry. Buyers of such cars became real lucky eyes in the eyes of acquaintances and friends, exactly the same as the buyers of the latest Mercedes models. And this was certain logical reasons, such as the incredible reliability of the main nodes.
VAZ 2110 - "Tenth" family and new problems
"Dozens" in the model line of the VAZ appeared for a long time, the popularity they found in 1998. Already in ten years they were removed from production, giving way to novelties of domestic development. Today, the "dozen" is considered quite adequate transport with certain problems in the assembly. On these models, the engines were raised different and they possessed various characteristics:
- 1.5-liter 8-valve simple power unit did not shift the valve, but showed only 72 power horses;
- modified 1.5-liter engine with 16 valves has become these same valves to actively bend;
- a more modern 1.6-liter power unit in the 8-valve valve version should spare, but this did not do it;
- you will also do not wait cheap repair after the timing belt break on the most powerful 1.6-liter 16-valve engine VAZ 2110.
The whole family of the "tenths" of the models was quite high-quality and reliable, but the farther the plant was trying to keep up with power, modernity and relevance, the more trouble received the car. The most endless and high-quality was 1.5 with 8 valves and 72 horses, but the latest models with powerful 16-valve units received only problems, judging by the reviews of car owners.
Modern era of VAZ engines - Main problems
For Lada Kalina there was a little modified model range of power units. This car was the first in the family of a new generation of VAZ, received all the engines that felt the valve when the timing belt break. Lada Granta also received three types of power units that actively bent valve. All budgetary power units of the VAZ in the modern valve execution bend. Priora and Largus offer such types of engines:
- the base engine priors is a 98-strong power unit, the only one that spares the valve in the modern model line of the VAZ;
- the second power unit has the same design, but 106 horses, and these extra 8 horses cause valve bending;
- 1.6-liter engine with 8 valves of French origin on the Largus valve does not oppress;
- but his brother twin with the 16 valves actively bends them when the timing belt cliff and mercilessly turn the upper part of the aggregate.
These are such conflicting and unusual characteristics in modern cars of the concern VAZ. But do not forget about another important representatives of the company. The Lada 4x4 car offers a good power unit 1.7 liters with 8 valves, which has the protection against the bending of these most valves. The unit albeit is not too powerful, but quite reliable. We offer to see a small overview of VAZ engines with recommendations for their operation:
Let's sum up
VAZ cars are unlikely to qualify for the title of optimal and best solutions even in their price range. But today, a grant or Kalina is often provided with the only possible purchase for the Russian family. A sharp increase in prices for other new cars responds to the need to buy precisely domestic developments. It should be noted that AvtoVAZ holds a colossal work on updating its technology, but even such labor does not yet give the desired results.
In modern range of VAZ there is only one own engine that does not heat the valve. This is a 98-strong unit on the prior. However, everything is arranged here so that you may not be lucky, so 16 valves will have to change after the belt cliff. In the other engines to change the valve and other parts will have to be unambiguous after the belt break. Much cheaper to monitor the state of the roller and belts by performing timely replacement of all these parts.
The valves are one of the important details of the gas distribution mechanism and when the timing belt breaks is most often exposed to significant deformations. And as a result, provides expensive repair Car owner.
This article describes the principles of operation of the gas distribution system, the reasons for which valve grid, the consequences of the timing belt break for the engine, and also described on which motors of the nigh or not the valve jet at the belt break.
The following main reasons can be distinguished:
- The state of the timing belt (cracks, wear of the teeth, the belt is pulled or weakened)
- Failure to comply with belt replacement (large car mileage).
- Ingress of the foreign body (should be checked correctly setting the protective cover)
What happens in the engine at the time of the belt break
To date, most often engines are used with 8 and 16 cl. They are responsible for the compression of cylinders and for the release of exhaust gases. They move due to the camshaft, which is spinning and presses the valve.
The operating cycle of the engine is a periodically repeated series of consecutive processes occurring in each engine cylinder.
The engine operating cycle occurs in 4 clock or 2 of the engine crankshaft. (Such engines are called 4 strokes, there are 2 tacts, but now in cars do not apply).
So you:
- Inlet
- Compression
- Expansion
- Release
The valve at the right time opens and close. The drive is carried out located on the camshaft cams. When the cams are rotated with its protruding part, presses the valve, as a result of which it opens. CL. Spring closes it.
The fist is an integral part of the gas distribution shaft (drivers call it camshaft). The camshaft has support cervices and cams. The torque from the crankshaft on the camshaft is transmitted or the timing strap.
If when the engine is running cleans the drive beltb, the camshaft ceases to be associated with the crankshaft. And it can stop arbitrarily in such a position, in which some of the valves will be fully open. In this case, the piston when moving up can encounter the valve, which in this case is short. And as a result, the engine faces serious repairs. There is a parsing of the motor, it is necessary to replace the valve, and in some cases there may be a "head" of the block, and so that it will be required to be fully replaced.
What machines are valve nigh
On most car when the timing belt breaks, the valve bend problem occurs. It doesn't matter whether the motor is working at idle or goes along the highway. All the same of them can be bought. It is precisely how important the gear when the belt is broken. The bend can occur at 8, 16 and 20 cl. Motors, on diesel engines and gasoline engines, small chairs and cars with a large working volume. therefore it is very important to replace the belt of the gas distribution mechanism in a timely manner. But the GRM break does not always lead to bending.
On which machines do not nigh valve
On some engines there is a small protection - grooves representing small excavations. Data ducts are set so that at high speeds the piston can't catch up with a closing valve. But when the timing belt breaks, they also help reduce negative consequences, and in some cases the valve is not at all.
Sometimes car owners pull them on their own, but it is not always correct. Because the presence of data from the engine leads to a decrease in the engine, an increase in fuel consumption, and the content of nitrogen oxides in the exhaust gases. Many autocompany have now abandoned such protection.
The most reliable method of combating the bending of the valves is the timely replacement of the belt
What to do so that the valve will not be afraid when the timing break
In order for the valve not bend it is necessary follow the state timing belt. It is necessary to change it to the timing specified in the service book (approximately 60-70 thousand km.). But it is also necessary to periodically produce visual inspection Belts, even if the changeance time did not come up. Quite often, the belt rushes immediately after its installation after 1000-2000 km. This happens if the work on its replacement is made ill-quality.
Periodically remove the casing and check the belt. Conspect it from the outside, check the belt roam and the presence of microcracks. And he should not be very grilled. Such inspections spend from time to time. As soon as you see signs of wear on the belt - it means it has come to replace it.
How to understand that the valve wondered
In the event of a belt break, there is a small chance for the lack of engine damage. Before removing the cylinder head, it is necessary to measure compression in the cylinders if the crankshaft can be checked. If the valve is damaged, the absence of compression will be observed. You must always turn off the battery when repairing the engine on the engine. To facilitate the rotation of the crankshaft, it is necessary to remove the ignition candles for the gasoline engine or incandescent for the diesel engine.
The crankshaft can be scrolled only in a normal position (usually clockwise).
The cost of repairing valves
Repair of this type usually costs the car owner quite expensive, at least 15 thousand rubles, and in case of damage to the head, the amount can increase significantly. With severe damage, even a new head may require, and the restraint does not make sense.
Bend valves can not benthened back! Some unscrupulous car services say they have spare parts for your car available, but actually fuse them back, which is unacceptable. Be sure to ask after repair to show deformed details.
In order not to get the valve on the car, it is necessary to make a timely replacement of the timing belt on cars, and also remember that the cost of replacing the timing belt is 10% of the cost of repair work during its cliff.
With the problem of flexing valves, car owners have encountered the first models "eights". Mounted on them, volume 1300kub. CM, when the belt breaks the valve.
This problem is associated with several reasons, such as pumping pumps and tension rollers, wear or poor-quality manufacturing belt of the gas distribution mechanism (timing).
At the time of the breakdown of the timing belt, the camshaft stops in the position in which there was a breakdown, and the crankshaft, continuing to rotate, pushes the pistons to meet open valves. As a result, their collision is colliding leading to damage to valves and pistons.
With this collision, it can damage not only the pistons, but also the walls of the cylinders, and the connecting rods. In this case, the repair of the car will be very expensive and time consuming.
On some types of engines of cars VAZ, it was possible to avoid. In such engines on pistons, special recesses for valves are cast, so when the belt is broken, the collision does not occur.
A few types of engines were installed on the LADE. Let's look at which of them are dangerous, and which are safe and why the valve is oppressed on Kalina, when the belt is broken.
Types of engines subject to this issue
- The eight-smelled, model 21116, 1.6 liters, is equipped with a lightweight piston group. Due to the relief of the pistons, the pistons became very subtle and casting under the valve, there was simply no place left. In the collision of such pistons with the valve, the entire piston group is common.
- Sixteenthiliated, models 21126, 1.6 liter volume, is installed on a more expensive class of Valina cars. On this engine, the collision of the pistons with valves is also inevitable.
- Sixteenhacted, model 11194, 1.4 liters, is one of the most economical, but, unfortunately, is also subject to this problem.
- Sixteenthiliated, models 21127, 1.6 liter volume. This is a new engine created on the basis of the previous model 21126. Installed recently. It is more powerful, but also remains in our list of "dangerous".
Types of engines not subject to this problem
- Sixteenthiliated, model 21124, 1.6 liters, is considered one of the most reliable. Installed on the twelfth model of the Zhiguli. With this motor, you will not have any problems on the gas distribution mechanism.
- An eight-flaped, model 11183, a volume of 1.6 liters, a proven engine, characterized by its reliability, ease of maintenance and accessibility of spare parts. Also gets into the discharge safe.
Several tips, how not to know whether the valve will bend on Kalina and do not get to expensive repair
In order to try to avoid damage to gas distribution mechanisms, it is necessary to make a timely replacement of the timing belt.
In this case, it is not enough to change one belt. Be sure to change tension rollers with it and follow the pump state. If necessary, it also needs to be replaced.
In no case do not save on spare parts. Carefully choose the timing belt. It should not have any irregularities, strips and seams.
When buying water pumps and tensioned rollers, choose only known and proven manufacturers.
Observing these simple rules, you will never know whether the valve blows on the Valina car, and how much the engine bulkhead costs.
I would like to hope that this article will help to avoid problems, usually related to the absence of the technical condition of the car. With the right to operate the elements of the gas distribution mechanism, such problems should not occur.
Many owners before buying a car still do not yet know about such a problem as a breakdown of the timing belt, and as a result of this, some engines occurs a piston collision with valves and their oppression. This problem is not only in domestic cars, but also in modern foreign cars, and it threatens with quite expensive repairs. This trouble was still at the old models of Zhiguli, but now we are interested in modern engines and we will consider them. And on the left in the picture, as a time, the consequences of this trouble are shown, so carefully read the information below to avoid a similar picture, because as they say, no one is insured.
Cleans the valve on the following engines
- 16-valve engine, volume of 1.5 liters. It is no longer installed on cars, but at one time there was a lot of them on the tenth family. That's the owners of these cars felt that it was. On a personal example 2112, I got the valve 2 times. And in both cases, after replacing the timing belt, even 10,000 km did not pass.
- Model 21126, which is currently installed on both viburnum, so on priors and grants. As already known, the collision of the valves and pistons is also inevitable when the belt is broken. Moreover, the repair can be very expensive, since in addition to all this can break the whole piston, ranging from the piston themselves and ending the jackets on the cylinders and rushing the rods.
- Modification 21116, which is now taking both grants and viburnum from recently. Although this SIOS unit is 8-valve and has practically not changed, but it will bring a lot of trouble when meeting pistons and valves. This happens due to the fact that the piston group in this engine is facilitated, so there is no place for the excavation in the pistons - the valve bend occurs accordingly.
- 1.4 16-CL. For the first time, the engine was installed on Kalina and it is also unsafe, although rather economical.
- VAZ 21127, which will first be installed on Lada Kalina. It is a volume of 1.6 liters with a similar design on the predecessor from the priori, but a little more power. He also refers to this list of "dangerous" motors.
The valve does not oppress on such motors as:
- 1.5 8-CL and 1.6 8-CL. The power unit with a smaller volume was installed on earlier versions of cars. And 1.6 to the late, including viburnum too. Everything is fine here and no timing belt clips are not scary, since there are deep grooves under the valve, which is enough to avoid collisions.
- 1.6 16-valve modifications 21124. This motor was installed on the VAZ 2112 at one time and enjoyed quite popular demand, as it was both powerful and reliable in this regard.
To at least somehow reduce the likelihood of hitting expensive repairs, take care of the choice of components and spare parts. Change the belt in a timely manner and carefully inspect it for the presence of a seam and if it is present, it is better to abandon him. And do not forget about rollers, which should also be high quality.
