LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 1987 >> 928 Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - V8 >> Testing >> Engine Compression

Engine Compression

With engine at normal operating temperature, remove all plugs and allow 12 compression strokes per cylinder.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 10.0:1
Compression Pressure
Normal 142-199 psi (10-14 kg/cm2 )
Minimum 114 psi (8 kg/cm2 )
Max. Variation Between Cylinders 21 psi (1.5 kg/cm2 )