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Home >> Pontiac >> 1986 >> 6000 STE >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - 4-CYL >> Testing >> Engine Compression

Engine Compression

Disconnect "BATT" terminal connector from distributor. Check compression pressure with engine warm, all spark plugs removed and throttle and choke valve wide open. Crank engine through 6 compression strokes before reading compression gauge.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
1.6L 9.0:1
1.8L
VIN J 8.0:1
VIN O 9.0:1
2.0L 9.0:1
2.5L 9.0:1
Compression Pressure
1.6L (VIN 4) 130-180 psi (9-12 kg/cm2 )
All Others 100 psi (7 kg/cm2 ) min.
Max. Variation Between Cylinders Less than 30%