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Home >> Pontiac >> 1968 >> Firebird Sprint >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Tune-Up - 6 CYL >> Engine Identification >> Compression Pressure >> Notes

Compression Pressure: Notes

At cranking speed with throttle wide open. Lowest cylinder must not be less than 80% of highest cylinder. 

Engine Lbs. Pressure
250" 1-Bbl. 150-170
  4-Bbl. 185-205
VALVE TAPPET CLEARANCE

6 Cyl. (All) Zero Lash (Hydraulic Adjuster)