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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (Engine Mechanical - 4.8L, 5.3L, And 6.0L (3 Of 4)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Timing Chain and Sprockets Cleaning and Inspection

Timing Chain and Sprockets Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Clean the components with cleaning solvent.
    2. CAUTION: Refer to Safety Glasses Caution .
  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 the following conditions:
    • 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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