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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Engine Mechanical - 4.8L, 5.3L, 6.0L And 6.2L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Camshaft Installation

Camshaft Installation

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    Fig 1: Removing/Installing Camshaft
    GM1704626Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If camshaft replacement is required, the valve lifters must also be replaced.
  1. Lubricate the camshaft journals and the bearings with clean engine oil.
  2. Install the camshaft sprocket bolt into the camshaft front bolt hole.
    3. NOTE: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.
  3. Using the bolt as a handle, carefully install the camshaft into the engine block.
  4. Remove the bolt from the front of the camshaft.
    5. Fig 2: Camshaft Retainer & Bolts
    GM1552492Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The gasket surface on the engine block should be clean and free of dirt or debris.
  5. Install the camshaft retainer (203) and the bolts (204). Install the retainer with the sealing gasket facing the front of the engine block.
    6. Fig 3: First & Second Designs Of Head Bolts
    GM1665445Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  6. Tighten the camshaft retainer bolts.

    Tighten: 

    • Tighten the first design hex head bolts (3) to 25 N.m (18 lb ft).
    • Tighten the second design TORX® head bolts (4) to 15 N.m (11 lb ft).

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