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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 271 (Engine Mechanical - 4.8L, 5.3L, 6.0L Or 6.2L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Camshaft Timing Chain and Sprocket Cleaning and Inspection

Camshaft Timing Chain and Sprocket Cleaning and Inspection

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    Fig 1: Identifying Timing Chain and Sprockets Inspection Areas
    GM1704628Courtesy of GENERAL MOTORS CORP.
  1. Clean the components with cleaning solvent.
    2. CAUTION: Refer to Safety Glasses and Compressed Air Caution .
  2. Dry the components with compressed air.
  3. Inspect the timing chain (1) for binding or wear.
  4. Inspect the camshaft position (CMP) sensor raised areas (2) for nicks or damage.
  5. Inspect for worn, damaged, or chipped teeth (3).
  6. Inspect for a damaged keyway (4).
  7. Inspect for worn oil pump drive splines (5).
    8. Fig 2: View Of Timing Chain Tensioner Inspection Points
    GM1658210Courtesy of GENERAL MOTORS CORP.
  8. 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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