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Home >> Jaguar >> 1987 >> XJ-S >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - V12 >> Testing >> Engine Compression

Engine Compression

Check compression pressure with battery fully charged, engine at normal operating temperature, throttle fully open and engine at cranking speed.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Pressure 225 psi (15.8 kg/cm2 )
Maximum Variation 35 psi (2.4 kg/cm2 )