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Engine Compression

Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
Prizm 9.5:1
Prizm GSi 10.3:1
Normal Compression Pressure 191 psi (13.0 kg/cm2 )
Minimum Compression Pressure 142 psi (10.0 kg/cm2 )
Maximum Variation Between Cylinders 14 psi (1.0 kg/cm2 )