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) With lifter fully collapsed, clearance between valve stem tip and rocker arm pad should be.060-.210".