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Home >> Jeep >> 1995 >> Grand Cherokee Limited, 4.0 S, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Specifications - 4.0L >> Mechanical Checks >> Engine Compression
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Engine Compression

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

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 8.7:1
Compression Pressure
Normal 120-150 psi (8.3-10.5 kg/cm2 )
Maximum Variation Between Cylinders 30 psi (2.1 kg/cm2 )
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