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Home >> Cadillac >> 2003 >> Seville SLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Troubleshooting - No Codes >> Symptoms >> Hard Start >> Engine Mechanical

Engine Mechanical

  1. Excessive oil in combustion chamber-leaking valve seals. See appropriate article in ENGINES.
  2. Inspect for low cylinder compression. See ENGINE COMPRESSION TEST under PRELIMINARY INSPECTION & ADJUSTMENTS in BASIC DIAGNOSTIC PROCEDURES - 4.6L DEVILLE & SEVILLE article.
  3. Inspect the following for incorrect or damaged basic engine parts:
    • Cylinder Heads
    • Camshaft & Valve Train Components
    • Pistons & Piston Assemblies
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