Compression test numbers range

2015 SUBARU WRX
51,000 MILES • 4 CYL • TURBO • 4WD • MANUAL
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What range of numbers should i get on a compression test on these cars? And what PSI difference between cylinders is considered okay?
Apr 4, 2022 at 6:49 AM
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BORIS K
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Hello,

The compression values are between 170-210 PSI with a maximum deviation of 14 PSI between cylinders.

Compression test should be conducted with the engine at operating temperature with the accelerator pedal fully depressed. Compression values will differ, depending on altitude.

Cheers, Boris
Apr 4, 2022 at 7:16 AM
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