Tag: Compression

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Cylinder Compression Test Procedure for Volvo

Running a compression test is easy. You need a screw in Compression tester, you can get cheaper press on ones but they are almost useless. Remove all 5 plugs screw in the compression tester then spin the engine over on full throttle after removing the fuel pump fuse and lead from Coi, after half a dozen spins you should have a good compression reading make sure its within the specifications or within at least 10%, for an 850 the compression should be 13-15 Bar for N/A & 11-13 Bar for T5.