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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 psi (kg/cm2 )
Normal Compression Pressure
2.4L (1)
4.0L 120-150 (8.3-10.5)
Maximum Variation Between Cylinders
2.4L 25 (1.6)
4.0L 30 (2.1)
(1) Compression should not be less than 100 psi (7.0 kg/cm2 ).
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