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Engine Compression

WARNING: This page is about a different car, the 1994 Mitsubishi 3000GT and 1994 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.

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

COMPRESSION SPECIFICATIONS

Application (1) Specification
Compression Ratio
3.0L (VIN J) 10.0:1
3.0L (VIN K) 8.0:1
3.0L (VIN H) 8.9:1
Compression Pressure
3.0L (VIN J) 185 psi (13.0 kg/cm2 )
3.0L (VIN K) 156 psi (10.9 kg/cm2 )
3.0L (VIN H) 171 psi (12.0 kg/cm2 )
Maximum Variation Between Cylinders 14 psi (1.0 kg/cm2 )
(1) See ENGINE/VIN ID article.