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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L, 5.3L & 6.0L (Repair Instructions - 2 Of 3) >> Off-Vehicle Repair Instructions - Part 2 >> Timing Chain and Sprockets Cleaning and Inspection

Timing Chain and Sprockets Cleaning and Inspection

  1. Clean the components with cleaning solvent.
    2. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  2. Dry the components with compressed air.
    3. Fig 1: View Of Camshaft & Crankshaft Sprockets Timing Marks Aligned
    GM156158Courtesy of GENERAL MOTORS CORP.
  3. Inspect the timing chain for binding or wear.
    4. Fig 2: Identifying Damaged Sprocket Teeth
    GM188097Courtesy of GENERAL MOTORS CORP.
  4. Inspect the camshaft and crankshaft sprockets for:
    • Worn teeth (1)
    • Damaged teeth (2)
    • Chipped teeth (3)
    • Worn valleys between the sprocket teeth
    5. Fig 3: View Of Crankshaft Sprocket
    GM156150Courtesy of GENERAL MOTORS CORP.
  5. Inspect the crankshaft sprocket keyway for wear.
  6. Inspect the crankshaft sprocket oil pump drive splines for wear.
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