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Home >> Buick >> 1968 >> Wildcat Custom >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Tune-Up - V8 >> Engine Identification >> Compression Pressure

Compression Pressure

Starter must not be energized when ignition switch is in LOCK position. Recorded compression pressures are to be considered normal if lower cylinder is more than 75% of highest reading cylinder  .

SPARK PLUGS

Gap 250" Synchro-mesh .035"
  All Others .030"
Torque 6 Cyl. 30 ft. lbs.
    V8 15 ft. lbs.
Spark Plug Type

250" AC 46N
350" AC 45TS
400", 430" AC 44TS
VALVE TAPPET CLEARANCE

All Hydraulic