FixVault

Compression Pressure

Check pressure with engine warm, plugs removed, throttle valve wide open, at cranking speed  .

Engine Pressure (Lbs.) (1)Variation (Lbs.)
383" 2-Bbl. 125-155 20
383" & 440" 4-Bbl. 130-165 25
(1) Maximum variation between cylinders
VALVE TAPPET CLEARANCE

All Engines (1) Zero Lash, Hydraulic
(1) Clearance between valve stem tip and rocker arm pad should be.060-.210".