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Compression Check: Specifications

Prior to taking a compression reading, verify the cranking speed is greater than 300 RPM.

All 4 cylinders must be tested to obtain valid test results. Record the readings.

The maximum pressure differential should not exceed 100 kPa (14.5 psi).
The nominal cylinder compression value is:
Turbo engines 1200 kPa - 1400 kPa (174 psi - 203.1 psi).