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Home >> Porsche >> 1978 >> 928 Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Tune-Up Procedures - V8 >> Engine Compression

Engine Compression

With engine at normal operating temperature, remove all plugs. Crank engine through at least 12 compression strokes per cylinder. Pressure should not vary more than 22 psi (1.5 kg/cm2 ) between cylinders.