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Home >> Buick >> 1968 >> Wildcat Base, Not Available Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up - V8 >> Engine Identification >> Compression Pressure
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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