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Home >> Hummer >> 2007 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 1805 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L - Repair Instructions - Off Vehicle (1 Of 3)) >> Camshaft Timing Chain and Sprocket Cleaning and Inspection

Camshaft Timing Chain and Sprocket Cleaning and Inspection

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Camshaft Timing Chain and Sprocket
    GM2359730Courtesy of GENERAL MOTORS CORP.
  1. Clean the components with cleaning solvent.
    2. WARNING: Refer to Safety Glasses and Compressed Air Warning .
  2. Dry the components with compressed air.
  3. Inspect the timing chain for binding or wear.
  4. Inspect the crankshaft sprocket for worn, damaged, or chipped teeth.
  5. Inspect for a damaged keyway.
  6. Inspect for worn oil pump drive splines.
    7. Fig 2: View Of Timing Chain Tensioner Inspection Points
    GM1658210Courtesy of GENERAL MOTORS CORP.
  7. Inspect the timing chain tensioner for the following conditions:
    • Damaged or broken tension spring (1)
    • Excessive wear or scoring on the chain guide surfaces (2, 3)
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