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Home >> Jaguar >> 1987 >> XJ6 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - 6-CYL >> Testing >> Engine Compression

Engine Compression

Check compression pressure with engine at normal operating temperature, throttle valve wide open, all spark plugs removed and coil wire disconnected.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 8.1:1
Compression Pressure (1)
Max. Variation Between Cylinders 5 psi (.35 kg/cm2 )
(1) Compression pressures vary from engine to engine. The critical factor is pressure variation between cylinders.