Engine Mechanical
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
- Excessive oil in combustion chamber-leaking valve seals. See appropriate article in ENGINES.
- Inspect for low cylinder compression. See ENGINE COMPRESSION TEST under PRELIMINARY INSPECTION & ADJUSTMENTS in BASIC DIAGNOSTIC PROCEDURES - 4.6L DEVILLE & SEVILLE article.
- Inspect the following for incorrect or damaged basic engine parts:
- Cylinder Heads
- Camshaft & Valve Train Components
- Pistons & Piston Assemblies