Engine compression measurement

Engine compression measurement in VAG Master

The condition of the engine is the heart of your car. If it is operating unstable, losing power or consuming more fuel, the best solution is to contact specialists for compression measurement. At the VAG Master car service network, we perform professional engine diagnostics, including accurate compression measurement in each cylinder, which helps to detect problems at an early stage and prevent costly repairs.

Compression is an indicator of the pressure that is formed in the cylinders during engine operation. Its decrease indicates wear or failure of engine components. Why does engine compression decrease:

• • long operation and, as a result, wear of pistons and other elements of the piston group;
  • incorrectly adjusted timing;
  • burnout of valves.

What does a compression test on a used car give?

If you bought a used car, be sure to contact our car service to check the diesel engine.

Among used cars, you often come across completely “killed” copies. It is clear that no matter what the previous owner says, you need to make sure that the car is in good condition and that no mechanism will fail in the middle of the road.

A compression test is a fairly inexpensive, but nevertheless effective way to understand the condition of the car’s engine. And in general, the real condition of the car. Of course, such a test cannot immediately give all the information about the engine, but it can give an idea of ​​​​the condition of the cylinder-piston system (the tightness of the piston-cylinder and valve-seat connections).

It should be noted that before carrying out this check, you should pay attention to charging the battery, because a discharged battery can reduce the compression value.

Key indicators: the difference in cylinder values. If it is 10-15%, then a more thorough engine diagnosis is necessary. There may be major problems in it that will affect your decision to buy this car.

It is absolutely contraindicated to check the engine compression yourself without proper tools and diagnostic devices. Such “by eye” checks can not only result in more expensive repairs at the service station, but also put you or the passengers of the car at risk.

                                                                                                                                                     Methods for measuring engine compression

With the open damper we detect the following defects:

• • piston defects
  • 400;”>damage to cylinders
  • valve deformation

With the closed damper we detect the following defects:

• • head gasket leaks
  • obvious gaps or cracks in the walls of the internal combustion chamber
  • wear of the camshaft shaft

Instructions for each type of engine must necessarily include information on measuring compression in it. Ideally, when the compression level is close to that specified by the manufacturer in the technical specifications of the car.

In general, checking the engine compression helps to avoid costly repairs in the future associated with wear of the engine and engine components. But what’s worse is that these problems can appear during the trip and endanger the driver and passengers.