As is well known, the normal functioning of the VAZ-2114 engine should be normal compression in the cylinders. But, not all motorists understand how to merge it and what should be the norm. This article will tell about the level of compression in the engine cylinders, as well as the reasons for increasing the indicator and the measurement process.
Video about froze compression on VAZ-2114 with your own hands:
The video footage will tell how to measure compression in the car.
Process measurement compression in engines
According to the regulatory and technical documentation, a boundary compression indicator in the VAZ-2114 engine cylinders is established. So, an increase or decrease in the indicator is not considered the norm, since the overestimated compression of the air-fuel mixture in the engine can lead to not very good consequences.
Also, it is worth noting that compression in all cylinders should be relatively equal. Different indicators are not the norm and this is the first calls to engine overhaul.
Normal compression in the engine cylinder
As practice and many years of motorists experience shows, compression in the cylinders should be 14 bar, but at the same time the lower boundary indicator should not be reduced below 11 bar .
When measurements, the difference in compression between the cylinders should not exceed 1 bar.
Example Bad and Normal Compress
Let's give a visual example: 12-13-12-13 - this is a normal compression for the engine, and here 12-11-12-8 - This is not normal and it is believed that the engine needs diagnosis and overhaul.
Causes of increasing compression
Compressometer for replacing compression
It becomes clear that the decrease in the compression in the engine is associated with the wear of the main elements, such as: pistons and compression rings, indigenous and battered liner, as well as valve. But, with what reasons is the fact that the compression has risen?
So, consider the main of them:
- When performing repair operations related to the gas distribution mechanism, it was allowed error in adjusting work that changed the order of the node, and accordingly compression in the cylinders.
- Glow on the valves As well as car accumulation on the walls of the cylinders and the throttle node leads to an increase in compression degree due to a decrease in space in nodes.
- Also, the reasons for increasing compression in the cylinders can be attributed.
- The last reason for the occurrence of increased compression is. The malfunction is diagnosed simply simply - oil wells are twisted and examined. Oil film suggests that there is an overaction of oil, and the need to change the valve seals.
Fro compression with your own hands
Measure compression in the cylinders is necessary with special Device - Compressometer. There are many types of them, but the best and most accurate are threaded.
- So, to measure compression in the cylinder, you must unscrew the candle and screw the compressometer fitting.
- Then, turn the ignition key while the engine does not start scrolling the crankshaft.
- The engine must start and the motorist adds gas to the motor slightly worked.
- Thus, the compressometer freezes the most accurate value.
Compression should not be below 11 bar, otherwise, it is necessary to understand the causes of malfunction.
conclusions
It was found that the normal compression for the engine VAZ-2114 is to show 11-14 bar . The increase or decrease in this indicator, as well as the gap more than 1 bar between the cylinders is not considered the norm and is diagnosed. Measurement of compression in the engine is carried out using a compressometer.
Considering the fact that cars of the VAZ 2106 model were released over 4 million pieces, there are still quite a lot on our roads. Accordingly, questions on the repair of the legendary "classics" are still relevant. For example, the question of what compression should maintain a good engine "Six".
Concept of compression, its measurements
Among the technical data prescribed in the car operating manual, this characteristic is not. There is a slightly different concept - the degree of compression. There is no direct dependence between these two parameters, they are combined with each other only one - in both cases we are talking about pressure.
- The degree of compression is the calculated constant value, it does not have dimensional units. For the VAZ 2106 engine and its modifications it is 8.5. This figure is the result of dividing the full working volume of the cylinder to the volume of the combustion chamber. Simple words, fuel and air mixtureIntroduced into the cylinder space, compressing moving up the piston of 8.5 times.
- Compression is a variable value, its value depends on technical statuswhere the motor is located. This parameter shows which pressure occurs in each individual cylinder when rotating crankshaft With the starter. It is measured by its pressure gauge, which is screwed instead of the spark plug, the unit of measurement is 1 kgf / cm 2 or 1 bar, which is almost the same (1 kgf / cm 2 is 0.98 Bar).
Compression is measured in order to determine the degree of wear of the cylinder piston group. Its values \u200b\u200bwere obtained by experienced, in practice. Measurement is performed as follows: all 4 spark plugs are twisted, and in their place alternately into each cylinder is screwed down the pressure gauge with check valve And with the rotation, the starter is determined maximum pressurewhich can pump every piston. In the VAZ 2106 engine, the ideal indicator is 13 kgf / cm 2, but this is a rare case, such pressure is found on new, only rolled engines.
How to use measurement results?
If the measurement indicator ranges from 11 to 12.5 kgf / cm 2, then this is a normal working engine VAZ 2106. It is important that compression in all 4-cylinders is the same, the difference in more than 0.5 kgf / cm 2 speaks of a malfunction in one of them. As a rule, this is a burnt valve, such a problem happens when driving on poor-quality fuel and high loads.
The results of measurements that showed pressure from 10 to 11 kgf / cm 2, read about speeding engine. These results may not be quite accurate when the saipunite motor. So called the phenomenon at which through the ventilation hose of the crankcase from the cabin to the carburetor, together with crankcase gases, begins to fall motor oil. The reason is simple: due to wear piston rings In the Carter space, an overpressure appears, which pushes the oil drops through the sapun into the carburetor.
The lubricant together with the fuel falls into the combustion chamber and after burning it forms a nagar on its walls and a spark plug. When oil falls a lot, it begins to fill the gap between the worn rings and the surface of the cylinder, the compression readings will then be higher and cannot be based on them. That is, if the engine saipunits, then the time has come to replace the piston rings.
The magnitude of the compression is 9-10 kgf / cm 2 indicates the wear of the cylinder-piston group or valves. In both cases, engine disassembly is required. Such a motor usually consumes oil and fuel, it is unstable, part of the power is lost. Nevertheless, it can be continued to operate for some time, the main condition - compression in all cylinders should be the same. If in some of them finally prohibit the valve, then the pressure in it is much falling and the cylinder will refuse at all.
The same fate expects an aggregate, compression in which is below 9 kgf / cm 2. Such pressure indicates the need for it overhaul. In such cases, it is possible to remove everything from the engine hinged equipment, unscrew it from the gearbox and are entirely removed from the support to disassemble and repair in more convenient conditions.
In parallel, they check the state of the rubber parts of these supports, it may be necessary to replace the pillows. Many motorists perform the engine disassembly right by car, this option also has the right to life, especially if you need to replace only piston rings.
Tell me what optimal values \u200b\u200bshould be by compression on the VAZ 2114 1.6 8 CL? It was reserved today from 12.5 to 14.. told the valve to regulate preferably. Perhaps some kind of fit. And do not much 14 points in the cylinder? And then Comrade says maybe the engine was overheated, since such a large compression of 14 points. Thanks to all that responded!
Already wrote in your topic valve to regulate every 15th / km. By compression, x.zo on my 9-ke also in all cylinders of 14 and nothing went
Message from Bure:
Already wrote in your topic valve to regulate every 15th / km.
would you like to know when these last 15 thousand were) I bought a car 2 weeks ago)
Message from Bure:
So make a complete it my car now, and so every 15th / km is neither difficult.
i do SOTCH, as far as possible, so to speak)
16Nar, Roniai, 15th wheels, xenon everywhere, pipe in side and drove)))
Message from USSA555:
Could rings oil dialing to heal on 4 cylinders. It also depends on how much the compressometer shows exactly. There is a discharge of pressure, it means first of all to adjust the valves, and then measure it. On 8 valves, the perpetual problem of the valve, did not adjust on time, a little exhaust burned down and starts the car to work badly, especially "smart" in this case begin to change everything that can be started from the candles to sensors. If the valves changed, it is easily easily with the quality of our spare parts, you can at least check every thousand gaps, the metal sits down.
thank you! valuable advice. Tomorrow I will regulate the valve.
Message from USSA555:
Compression only needs to be measured when the nozzles and the ignition module are disconnected. The simplest to remove the crankshaft sensor plug. It is more difficult for 14 access, you can turn off the plug from the ignition module, when scrolling the gas starter to the floor, with a fully open throttle (with a fully open gasoline flap does not arrive). Otherwise, if gasoline arrives, overstars the pressure.
this is aware) but thanks anyway)
It is treated with adjustment.
Posted by Tesla:
As far as I remember, one-day 8klap, compression 12-15kgs / cm2 is the norm (with a relative pressure difference in the cylinders not more than 0.5, i.e. for example 10-9.5-10-10). The pressure is lower than more mileage and less well-kept car. Measure both on cold and hot-in engine (gas in the floor, we can only turn the starter - pump only air). If the pressure difference is essential (up to 1.5kgs / cm2 inclusive), then:
1) something is wrong with piston (cluttered rings, clad valve);
2) The timing belt rearranged on the n-tooth (strong old or weak stretch).
It is treated with adjustment.
The difference in pressure in 2kgs / cm2 cylinders and more indicates the need for overhaul of the engine.
PS: I always rely on the testimony obtained from a heated motor, the cold readings take note (initial data).
the valve adjusted. everything exhaust valve were clamped ... timing belt new, pump and roller new stretching normal
Compression then compared?
Posted by Tesla:
I forgot to add, - if you go to repair / adjustment somewhere, then you should look for what can be made elementary for prevention. For example, clean the mesh of the oil separator in valve cover, it is still removed to adjust heat clearances valves. It seems to be a trifle, sprinkled with Vince, proceded, washed off, blurred, and the ventilation of the crankcase becomes better and the motor is easier. I do not know how much it is in the topic or not in the topic, but I love to do this spirit. It is clear that in the car service it is rarely someone will offer.
Compression then compared?
yes everywhere 14 became
The very concept of "compression" indicates the pressure value, which develops the engine piston at maximum compression of the working mixture, that is, when it is in its maximum bottom point. Than this parameter is higher, the fuel and air mixture will occur at a larger temperature, which means that its flow rate will decrease and the total motorcycle efficiency will increase.
Compression VAZ 2114, actually, as well as compression on any other car, depends on the following indicators:
- from the size of the lumen between the walls of the cylinder and valves;
- from the volume of the incoming mixture, which, in turn, depends on the position of the throttle of the throttle and the characteristics of the air filter;
- from the current engine temperature.
In turn, the magnitude of the gaps between cylinders and elements of the piston group can also have a number of reasons:
- high degree of wear or rooting of their walls;
- incorrectly exhibited the size of the lumen between the walls of the cylinder and valves;
- the ingress of liquid gasoline into the cylinder (not in the form of a mixture), which causes oil wash from the walls and an increase in the lumen.
Compression is normal and its deviations
According to generally accepted standards, the compression of the VAZ 2114 8 valves ideally should be equal to 14 bars (almost 14 atmospheres). The maximum allowable deviation to the bottom side is 3 bars (that is, the size of the compression should not be below 11 bar).
True, it is allowed only if the size of the compression in different cylinders It differs no more than 1 bar. That is, in four cylinders the following compression schemes are admissible: 12-12-11-12, 12-11-12-11 and so on. If the pressure variation value exceeds 1 bar, then such an engine is subject to urgent repairs.
For example: 11-14-12-8.
Also, it should be remembered that increased compression is not less evil than reduced or compression with a large scatter in the cylinders. So, high blood pressure In the cylinders of VAZ 2114, it can cause high load on the components of the engine, sedimentation of a car on the walls of cylinders, and, ultimately, lead to the complete output of the motor.
Thus, the compression is normal to be: ranging from 14 to 11 bar, and to have a scatter from the cylinder to the cylinder no more than 1 bar.
In most cases, only new engines have perfect compression in 14 atm. Even after short-term exploitation, it can rather quickly seek 1-2 units - this is considered quite a normal phenomenon. As further wear, it will become even greater, and the wear itself will flow in all cylinders in different ways, which ultimately will lead to a large scatter of pressure in them.
Pressure measurements
What the compression should be on the VAZ 2114 is normal, we have already answered. Now consider - how is it, actually, measure? To begin with, we will need a special device called compressometer.
All measurements with it are performed in the following order:
- Fully charge the battery.
- Warm motor up to 75-90 gr. FROM.
- After the engine warms up, unscrew all the candles.
- Disable fuel supply hose.
- Insert measuring device In the first candle hole.
- Press the gas pedal and keep it (for this measurements must be used together).
- Run the starter and crankshaft when it is helpful.
- Wait until the readings on the dial (monitor) of the device will not reach the maximum - this will be the value of compression in a particular cylinder.
- Move the compressometer to another candle hole and continue the measurement.
After the pressure is measured in all cylinders, you can draw conclusions about the overall state of the engine and the need for repair / recovery.
If the compression does not correspond to the norm, then from the trips on the car should be refused and try to first solve this problem. Otherwise (especially if the pressure is too high) the engine can be completely out of order, after which it will be required to complete recovery.
Measurement of pressure in cylinders without compressometer
Some motorists are asked if it is possible to check, normal compression in the VAZ 2114 8 valves engine or not, without the use of special devices.
The answer is possible. True, the results of this measurement will not be accurate, but relative.
In order to check the status of cylinders without a compressometer, you will need to twist all the candles from cylinders except one that will be tested. Then you should manually scroll the crankshaft. Then, a similar operation is repeated with the remaining three cylinders. Subjective sensations about the ease of rotation and will result.
If, when testing one of the crankshafts, the crankshaft rotated too easily, then this cylinder has reduced compression and considerable wear. Confirm or refute it can be injecting a small amount of oil into the cylinder using a syringe.
If after that, the crankshaft will have to rotate with a much greater force, which means the walls of the cylinder or the piston have significant wear (as oil filled the lumen and increased compression).
You can try to solve the problem with the compression on your own by one of the following ways: adjust the valve, spend the excavation of the motor (it will help to remove the pulp on the walls on the walls) or replace oil rings to new ones. If all these operations did not help, and compression still does not correspond to the norm, then the engine is seriously worn out and is subject to overhaul.
Useful video
For more information, you can find on the video below:
If you notice that your engine has become worse to work, then it may be time to check the level of the motor compression level. What should be the compression of the VAZ 2114 8 valves? How to check it? We will tell our readers about this in this article.
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What is needed for?
Engine compression VAZ 2114 8 valves indicates the working condition of the motor. This indicator determines the engine power, its service life. The process for measuring the compression of the motor VAZ 2114 8 valves should be carried out at least than every 20-30 thousand mileage kilometers. In addition, it should be done before purchasing a car.
The compression itself is the level of pressure that is formed at the end of the compression of the tact in the cylinder. That is, if you notice that the motor of your VAZ 2114 8 valves began to work worse, namely the flow rate of gasoline and motor fluid, power decreased, then you need to check it. Motor diagnosis primarily includes checking the level of compression. This is one of the few procedures that will allow you to reveal the state. power aggregate Without his parsing. But what should be compression in the engine VAZ 2114 8 valves?
Such a question came to every motorist. If its level is too high, then less gases will fall into the CARTER. Accordingly, a more rich gas flow will perform useful work. But if the level is excessively low, it will reflect on the power of the car and the limit of the maximum possible speed that the machine can develop. In addition, the dynamics of overclocking will decrease. So what should be the compression of the VAZ 2114 8 valves?
The normal level should be at least 10 bar.
In this case, the difference among the cylinders should not be more than 1 bar. If, as a result of the measurement, you revealed that from the first to the fourth cylinder, the pressure level is 11, 12, 11, 12 bar, then the motor operates in normal mode. But if the indicators differ significantly, for example, 11, 8, 13, 10, then you need to repair the car. Ideally, compression for 2114 8 valves should be 14 bar in each cylinder.
What influences this indicator?
Many factors affect these proportions:
- Volume of received gas. In particular, to ensure normal level Pressures should be changed in time.
- Installation of gas distribution phases.
- The incorrect level of controlling the gaps in the drive of one of the eight valves.
- Motor operating temperature. If it is significantly lower, the level of pressure, respectively, will be an order of magnitude less.
- Defects of oil-chain rings, as well as valve extensions.
- Gasoline, which for any reason comes into one of the cylinders.
We carry out a check for 8 valve vehicles
So, the procedure independent check Motor is not a particularly difficult thing. Having the necessary skills and the device, with which the pressure can be measured, the procedure can be performed independently. Naturally, this will have to follow certain requirements that are listed below. If you know what kind of compression in the internal combustion should be, then you can proceed to work.
Phased instruction
The first thing you need to measure the pressure level in the engine is a device with which you will do it. What to measure this coefficient? The device is called "compressometer" for this. Such a device may be several types:
- universal device;
- threaded;
- flexible;
- clamping.
You will need to find such a device. Also in this case you will need a friend's help, because you have to simultaneously perform some actions both inside the cabin and in motor compartment. In addition to the compressometer, prepare the key to dismantle the spark plugs. Note that when non-working battery Work is better not to perform. Therefore, charge your battery completely. So, proceed to verification:
- First sit behind the steering wheel and start the engine. Let him work on idling And up to 90 degrees will warm up, that is, to the operating temperature.
- After that, open the hood and take the key to dismantle the candles. You need to remove high-voltage wires, after which make dismantling of all spark plugs. Wires are suitable for candles, they need to just pull out.
- Now dismantle the ECU fuse to avoid the possible device breakdown.
- When the candle is dismantled, you need to install your device to check the pressure level. Make it carefully not to damage the thread.
- You will now need a friend's help. Ask him to sit in the driver's seat. The assistant must harm the gas pedal to the end to throttle valve Could be completely discovered.
- Then you should enable the starter and turn it with a crankshaft. This is done until the testimony on the compressometer will not cease to increase. As a rule, it takes no more than 10 seconds. In this case, the crankshaft must rotate, and its speed should not exceed 100 revolutions per minute.
- Now you can read the obtained readings. Better write them better. Remember what the compression should be and take these testimony with the received. When the readings are recorded, the device arrow can be put on zero.
- This procedure should be repeated for each engine cylinder VAZ 2114 8 valves.
As you understand, there is nothing particularly difficult in this procedure. You just need to correctly perform all the measurements on the measurement and you will get the most accurate results.
Video from Andrei Omikov "Measurement of compression on your own"
See how the procedure of independent measurement of the level of pressure at home is based on the example of the VAZ 2115.
