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Home >> GMC >> 2005 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 223 (Engine Mechanical - 3.6L (Ly7) (4 Of 6)) >> Off-Vehicle Repair Instructions - Part 2 >> Engine Flywheel Cleaning and Inspection >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Engine Flywheel Inspection Locations
    GM1210793Courtesy of GENERAL MOTORS CORP.
  1. Inspect the engine flywheel for the following conditions:
    • Stress cracks around the engine flywheel-to-torque converter mounting bolt hole locations (1) and/or engine flywheel-to-crankshaft (2, 4)
      • IMPORTANT: Do not attempt to repair the welded areas that retain the ring gear to the engine flywheel plate. Install a new engine flywheel.
    • Cracks at welded areas that retain the ring gear onto the engine flywheel (3)
    • Damaged or missing ring gear teeth (5)
  2. Replace the engine flywheel as necessary.
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