FixVault

Engine Compression

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

COMPRESSION SPECIFICATIONS

Application (1) Specification
Compression Ratio
Mirage & Summit 9.5:1
Summit Wagon 8.5:1
Compression Pressure
Mirage & Summit 199 psi (13.9 kg/cm2 )
Summit Wagon 185 psi (13.0 kg/cm2 )
Maximum Variation Between Cylinders 14 psi (1.0 kg/cm2 )
(1) See ENGINE/VIN ID article for VIN information.