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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1071 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, Or 7.0L (3 Of 5)) >> On-Vehicle Repair Information (2 Of 2) >> Camshaft Replacement (LH6, LMG, LY2 and LY5) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Camshaft
    GM1704626Courtesy of GENERAL MOTORS CORP.
  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 and/or debris.
  5. Install the camshaft retainer (203) and bolts (204). Install the retainer with the sealing gasket facing the engine block.
    6. Fig 3: Identifying Camshaft Retainer Bolts
    GM1665445Courtesy of GENERAL MOTORS CORP.
  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).

    7. Fig 4: View Of Compressed Tensioner
    GM1658249Courtesy of GENERAL MOTORS CORP.
  7. Compress the timing chain tensioner guide and install the EN 46330  . See Special Tools .
    8. Fig 5: View Of Camshaft Sprocket & Timing Chain
    GM1658265Courtesy of GENERAL MOTORS CORP.
  8. Align the camshaft sprocket so the timing mark is in the 6 o'clock position.
  9. Install the camshaft sprocket (205), timing chain (208), and bolt (206).
    10. Fig 6: Identifying Camshaft & Crankshaft Marks
    GM1658268Courtesy of GENERAL MOTORS CORP.
  10. Inspect the sprockets for proper alignment. The marks on the camshaft sprocket (1) should be located in the 6 o'clock position and the mark on the crankshaft sprocket (2) should be located in the 12 o'clock position.
    11. Fig 7: Locating Tensioner Pin
    GM1658271Courtesy of GENERAL MOTORS CORP.
  11. Remove the EN 46330  . See Special Tools .
    12. Fig 8: Identifying Camshaft Sprocket Bolt Tightening Sequence
    GM1658274Courtesy of GENERAL MOTORS CORP.
  12. Tighten the camshaft sprocket bolt.

    Tighten: 

    1. Tighten the bolt a first pass to 90 N.m (66 lb ft).
    2. Tighten the bolt a final pass to 40 degrees using J 45059  .

    13. Fig 9: View Of Special Tool & Bolts
    GM1658136Courtesy of GENERAL MOTORS CORP.
  13. Remove the J 42386-A  (1) and bolts. See Special Tools .
  14. Install the starter motor. Refer to Starter Motor Replacement (4.3L) or Starter Motor Replacement (4.8L, 5.3L, 6.0L, and 6.2L) or Starter Motor Replacement (6.6L) .
  15. Install the engine front cover. Refer to Engine Front Cover Replacement (LC9, LH6, LMG, LY2 and LY5) or Engine Front Cover Replacement (LY6, L76 and L92) .
  16. Install the valve lifters. Refer to Valve Lifter Replacement (L92 - First Design) or Valve Lifter Replacement (L92 - Second Design) or Valve Lifter Replacement (LY2 and LY6) or Valve Lifter Replacement (LH6, LMG, LY5 and L76) .
  17. Install the radiator support. Refer to Radiator Support Replacement .
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