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Home >> BMW >> 1983 >> 320i Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - 4-CYL >> Testing >> Engine Compression

Engine Compression

Remove fuel pump relay. Pull plug on transistor ignition control (TCI) unit. Check compression with engine warm, battery fully charged, throttle fully open and engine operating at cranking speed.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 8.8:1
Compression Pressure 142-146 psi (9.9-10.2 kg/cm2 )
Max. Variation Between Cylinders 15%