FixVault

Engine Compression

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

ENGINE COMPRESSION

Model Standard psi (kg/cm2 ) Minimum psi (kg/cm2 ) Minimum RPM
Prelude (1) 178 (12.5) 135 (9.5) 250
(1) Maximum variation between cylinders is 28 psi (2.0 kg/cm2 ).