Compression Pressure: Notes

1967 Chevrolet Corvette 2D Convertible, 5.3L Eng, Not Available TransSECTION Notes

At cranking speed with throttle wide open and all plugs removed. Maximum variation between cylinders is 20 lbs  .

283" V8 150 lbs.
302" V8 190 lbs.
327" V8, 210, 275, 300 HP 160 lbs.
  325, 350 HP 150 lbs.
350", 396" V8 160 lbs.
427" V8, 385, 390, 400 HP 160 lbs.
  425, 435 HP 150 lbs.
VALVE TAPPET CLEARANCE

302" V8 .030" Intake & Exhaust
396" V8 375 HP (1).020" Intake;.024" Exhaust
427" V8, 425 HP (1).022" Intake;.024" Exhaust
  435 HP (1).024" Intake;.028" Exhaust
All Others Zero Lash, Hydraulic
(1) With engine at normal operating temperature and engine running.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.