What is VAZ 2110 compression, what is the working function of the compressor, what is the principle of its operation? Why does this device fail and what can be done in this case? Any car owner should know the answers to these questions.
Compression is the maximum amount of cylinder pressure resulting from the completion of the compression process. The indicated value is measured in several ways. The most common unit of measurement is the atmosphere. Compression is a variable value, it changes depending on the compression force, and also becomes less as parts wear. In addition, it can be different for different engine models and depends on the volume of the power plant.
Every driver has probably heard about compression at least once, but it is often confused with another value, namely compression force. It is worth saying right away that these are completely different things. The compression ratio determines the pressure throughout the entire compression period, and the compression only at the end of the stroke.
Compression problems
The most common compression problem for the VAZ 2110 is a sharp drop in pressure. As a result, the engine refuses to work, parts wear out. Why is this happening? This happens due to a careless attitude to the car, when filling low-quality fuel and oil.
Bad fuel affects the deposition of salt residues, which, when the engine is running intensively, cause damage to parts, chips and scratches, leading to problems and failures of the working system. To increase compression and restore the normal operation of the power unit, you must first eliminate the problems that caused the failure, that is, carefully diagnose the system and replace defective parts.
As a rule, VAZ compression decreases due to piston wear. So, you need to pay attention to the state of these details. Wear of the piston system occurs in the process of loose fit of its elements. This is a manufacturing defect that is rare in modern European cars, but is a normal thing in domestic cars, especially the VAZ 2110.
What can be done in such a case? It is necessary to purchase the appropriate additives designed specifically for this purpose, and build up the non-matching part to the required dimensions. Sometimes, with minor docking defects, thick engine oil helps.
But there is another problem, namely the occurrence of piston rings. Then the use of thick engine oil and increasing the thickness due to additives are unacceptable, it is necessary to carry out a comprehensive repair to fix the problem. It also happens that the pistons jam. To resolve this problem and improve the operation of the device, it is necessary to dismantle the candles and pour in a little (about 100 ml) of engine oil.
Candles are postponed for an hour and put in place. Now it's time to let the engine run. What will happen? The oil softened the scale on the candles in an hour, and now (when the engine is started) it will easily work out and will not slag a vital part for the car. This means that the compressor at the VAZ will start working in normal mode.
How to install a compressor with your own hands?
When the old device is defective, it is necessary to install a new one (see photo). Installation of the compressor on the VAZ is carried out in a short period. This is not a laborious process, but it requires the utmost care and caution. To work, you will have to arm yourself with the following equipment:
- set for compressor unit;
- keys;
Compressor Installation Diagram
- air filter system;
- pressure controller;
- paste based on abrasive components.
Before starting work, make sure that the power unit is completely cool, otherwise you may get burned. Work begins with the dismantling of the air duct and filter. The collector brackets are removed. Now the fasteners of the part, which is popularly called the snail, are being installed on the motor block.
We change the drive belt to a belt taken from the compressor unit kit. It is more efficient, reliable and will last much longer. We adjust the belt so that it is not too tight, but not too loose. The next step is the installation of the air duct and fasteners for the pressure controller.
A filter is attached to the compressor outlet. The last step in the work is to adjust the injector so that the power unit does not receive a lean mixture. It is better to check this in the service, since it is problematic to do this operation on your own.
This is the entire list of works on replacing the compressor. It may seem too complicated for a beginner, but in fact there is nothing difficult here. It is necessary to carry out the described work 1-2 times in the presence of a knowledgeable master, and this skill will be worked out to an automatic level.
Many owners of the VAZ-2110 are wondering why there is different compression on their car? Typically, compression is built up as the piston moves from the bottom to the top. In this case, a certain pressure is created in the cylinder. Good compression can only be achieved when all gaskets, pistons, rings or valves are in good condition. It is because of these elements that the air in the system is compressed.
Normal compression on the VAZ-2110
Usually compression is checked using a special device. It is recommended to do this regularly.
This helps to determine the degree of wear of the motor and rings, as well as the piston itself. The normal pressure in the cylinder on a VAZ-2110 with 8 valves should be from 10 to 12 atmospheres .
Normal compression in the cylinder.
It is also worth noting that sometimes the pressure in different cylinders may differ . If this 0.5-0.7 atmospheres , then this phenomenon is normal and should not cause concern.
Abnormal compression
This happens when there are more or less atmospheres in the cylinder than in others.
Such an engine will not be able to work normally. He needs to make repairs.
Causes
Gasket burnout between the block and the head is a fairly common defect.
There can be many reasons why there may be a difference in compression. Experts identify the main ones. This:
- Blown head and block gasket. It just needs to be changed.
- The head is not tight. This could burn the gasket.
- Rings do not hold. Here the reason is the wear of the rings or their breakage. If the pressure drops in one cylinder, then this often indicates a breakdown of the rings. This will require a piston repair.
- Ring coking. You will need to clean them up.
- Block wear. Happens rarely.
- Motor overheating.
- Broken or burnt piston. There is no compression at all.
- Valves not adjusted.
Repair
As can be seen from the above, there are many reasons for different compression in the cylinders. Repair in this case can not always be done by yourself, especially if there are no skills. In this case, it is recommended to contact the specialists at the service station.
Folk methods of increasing compression
It is noted that the methods described below cannot be a 100% guarantee that the compression in the cylinders will increase.
- Buy a quality valve cleaner and pour it into the oil.
- Pour such liquid into the cylinders overnight.
conclusions
Knowing these points, you should not worry about the difference in compression in different cylinders on the VAZ-2110, if it is small. When the norm exceeds the allowable indicators, will need to be repaired.
Over time, auto parts wear out and not only the chassis, but also the engine. Why is a compression test required in the cylinders? For example, you buy a used car, and in order to find out what condition the engine is in, it’s better to play it safe and check the compression so that you don’t have to do a major overhaul after a couple of months. I took my top ten when she was 5 years old, by that time the mileage was no longer small (about 90,000). When inspecting the car with me was a specialist who checked the compression in the cylinders.
Now let's take a look at how this is done. I will immediately warn you that it is better to check the pressure together, so ask someone to help you.
Work progress
To carry out the work, we need
- compressometer
- candle key
for 8 valve
for 16 valves
This is where you need a helper. He should sit in the car and, with the gas pedal fully depressed (full throttle opening), turn the starter (start the car) for 5-10 seconds. We record the readings of the device and in the same way check the pressure in the remaining cylinders.
Normal compression of the VAZ 2110 engine must be at least 1.0 MPa (10 bar) in each cylinder, the difference in performance between cylinders must not exceed 0.1 MPa (1.0 bar).
At the time of buying the car, my compression was 12 bar, which is a very good indicator, now, though I don’t know how much compression will show, but there seems to be no problems with the engine)) I hope the article was useful to you, thank you!
Recently I was asked a question on my blog - why can there be different compression in the engine cylinders? The question, I’ll tell you the truth, is an interesting one, I personally asked myself a very long time ago when I was sorting out the engine, now it’s less and less because I drive more or less fresh cars. However, for those who have a run of 150 - 200,000 kilometers, it is dedicated ...
So why does this happen - when the pressure in one is much less than in the others? There may be several reasons for this, all from my experience, but almost always you need to remove the block head:
1) Broken gasket . This happens very often when it breaks the gasket between the block and the head of the block - we just change it.
2) Head not tightened . This is a continuation of the first reason - if the head is not tightened correctly, the gasket can also leak pressure.
These are the simplest reasons, but they are the most common - for example, this often happened on my new purchased VAZs, in particular on the VAZ 2114 and from a friend on the VAZ 2110. So, first of all, we climb there, on the new "our brands" - the problem it will be in this by 80%. More difficult problems follow.
1) Missing o-rings . This happens from wear, or from the fact that they broke. However, if your pressure has dropped in one of the cylinders, then most likely it is broken. The repair is complicated, you need to disassemble the block itself to pull out the pistons.
2) Rings coked . I decided to take it to a separate point - from low-quality engine oil, the rings can coke.
It's just that the oil burns at the points of contact and seals the rings in one place - although this is not correct, the rings do not go along their grooves, but only one side is machined, which leads to rapid wear - though this way the pressure will drop in all 4 cylinders. Because the oil lubricates all 4 pieces.
3) Block wall wear . This is rare - but it happens, that is, the ring has nothing to do with it, but it is the walls that they rub against that suffer. Most likely, this is a low-quality material.
4) . When overheated, the tightness of the rings and block walls is lost, they begin to pass both pressure and engine oil. An indirect sign is at work.
5) Burned out - the piston itself broke . In such cases, compression may simply drop to "zero".
Sometimes the piston itself burns out, it can be like a small “burnout” will say from the side, as well as a very large one - for example, in the middle. It also happens that the piston breaks, for example, from meeting with the valve when the timing belt breaks - again we lose the atmosphere.
6) valve . There are a lot of reasons. This is the wrong setting. And the burnout of the valve, it happens - one burns, so the compression will vary in just one cylinder. It can also break if the timing breaks.
These are the main reasons why the values will differ in exactly one pot out of all four.
Repair
As I wrote above, it is really difficult to make repairs yourself. Unless, of course, your gasket has been pierced - it’s really possible to repair here, but again, it’s not so easy. How to replace a small video.
Diagnostics is carried out with the head of the block removed - here it is already 100% possible to determine the malfunction. You are unlikely to do it yourself, contact the specialists at the service station, or understanding people.
