Engine Mechanical

1. Inspect engine mechanical for the following:
   • Compression. See ENGINE COMPRESSION TEST in BASIC DIAGNOSTIC PROCEDURES - 5.7L CORVETTE article.
   • Sticking or leaking valve.
   • Worn camshaft lobes.
   • Valve timing.
   • Worn rocker arms, or broken valve springs. See appropriate article in ENGINES.
   • Excessive oil in the combustion chamber - leaking valve seals.

Inspect for incorrect basic engine parts. Inspect the following:

1. Camshaft
2. Cylinder Heads
3. Pistons, etc.