V50 L5-2.4L VIN 39 B5244S7 (2005)
Compression Check: Testing and Inspection
Leak detecting cylinder
Special tools:
951 2775 Cylinder leak tester See: Tools and Equipment/951 2775 Cylinder Leak Tester
Cylinder leakage test or compression test
Using this method, the amount of leakage at the engine cylinders is measured and it is possible to locate the source of any leaks. To do this use: 951 2775
Cylinder leak tester See: Tools and Equipment/951 2775 Cylinder Leak Tester.
For D4164TX and D4204TX, use:999 7013 Adapter 951 2775 See: Tools and Equipment/999 7013 Adapter 951 2775.
A similar check can be performed using a compression gauge by injecting oil in the cylinder. However, this can cause a build-up of coke.
The result will not always be decisive or precise.
In addition, the VIDA station or the Volvo System Tester (VST) must always be connected afterwards to erase any diagnostic trouble codes (DTCs).
Description
The engine should be run to operating temperature so that the thermostat is open.
The piston in the cylinder that is being checked must be set to top dead center (TDC) at the compression stage.
A controlled air pressure is connected to the relevant cylinder via an adapter that is secured in the spark plug / glow plug well.
A gauge is used to measure the size of the leakage from the cylinder.
This is a pressure sensor with a regulator and displays the size of the leak expressed as a percentage.
This allows the extent of any problem to be determined.
