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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1678 (Engine Mechanical - 6.6L (LMM) - Repair Instructions - On Vehicle) >> Camshaft Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: View Of Camshaft, Camshaft Gear & Camshaft Thrust Plate
    GM660540Courtesy of GENERAL MOTORS CORP.
  1. Install the camshaft thrust plate to the camshaft.
  2. Install the camshaft driven gear.
  3. Install a NEW camshaft driven gear bolt.

    Leave the bolt finger tight.

    4. Fig 2: View Of Camshaft Gear Aligned With Crankshaft Gear
    GM663813Courtesy of GENERAL MOTORS CORP.
  4. Install the camshaft into the cylinder block, align the camshaft gear to the crankshaft gear as shown.
    5. Fig 3: View Of Camshaft Thrust Plate Bolts
    GM738902Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  5. Apply threadlock to the threads of the camshaft thrust plate bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.
  6. Install the camshaft thrust plate bolts and tighten to 22 N.m (16 lb ft).
    7. Fig 4: View Of Camshaft Exciter Ring, Bolts & Thrust Plate Bolts
    GM663091Courtesy of GENERAL MOTORS CORP.
    NOTE: Use a suitable tool to relieve the spring tension wile removing the locking bolt.
  7. Remove the exciter ring bolt that was installed to hold the spring tension of the two piece cam gear.
    8. Fig 5: View Of Camshaft Reluctor & Bolts
    GM739316Courtesy of GENERAL MOTORS CORP.
  8. Install the camshaft reluctor to the camshaft gear.
  9. Install the camshaft reluctor bolts. Tighten the bolts in a cross-bolt pattern to 9 N.m (80 lb in).
    10. Fig 6: Locking Flywheel Using J 44643
    GM660308Courtesy of GENERAL MOTORS CORP.
  10. Reinstall J-44643:  tool in the starter opening, if removed.
  11. Install a NEW camshaft gear bolt and tighten to 234 N.m (173 lb ft).
    12. Fig 7: Measuring Camshaft End Play Using J 26900-12 & J 26900-13
    GM738903Courtesy of GENERAL MOTORS CORP.
  12. Using J-26900-12:  indicator (1) and J-26900-13:  base (2) measure the camshaft end play.
    • The production value is 0.050-0.114 mm (0.002-0.0045 in) and service limit is 0.20 mm (0.008 in).
    • Replace the camshaft gear or the camshaft thrust plate if measured value exceeds the service limit.
    13. Fig 8: View Of Oil Pump Drive Gear
    GM738904Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not damage the teeth on the crankshaft reluctor.
  13. Install the oil pump drive gear and reluctor to the crankshaft.
    14. Fig 9: View Of Oil Pump Driven Gear & Nut
    GM738905Courtesy of GENERAL MOTORS CORP.
  14. Install the oil pump driven gear.
  15. Install the oil pump driven gear nut and tighten to 100 N.m (74 lb ft).
  16. Install the engine front cover. Refer to Engine Front Cover Replacement .
  17. Install the engine assembly. Refer to Engine Replacement .
  18. Install the valve lifters. Refer to Valve Lifter Replacement .
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