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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1020 (Engine Mechanical - 6.6L (LLY)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Camshaft Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  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 1: View Of Camshaft, Camshaft Gear & Camshaft Thrust Plate
    GM660540Courtesy of GENERAL MOTORS CORP.
    Fig 2: Aligning Camshaft W/Cylinder Block
    GM663813Courtesy of GENERAL MOTORS CORP.
  4. Install the camshaft into the cylinder block, align the camshaft gear to the crankshaft gear as shown.
  5. Apply threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads of the camshaft thrust plate bolts.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    6. Fig 3: View Of Camshaft Gear Bolt
    GM738902Courtesy of GENERAL MOTORS CORP.
  6. Install the camshaft thrust plate bolts.

    Tighten:  Tighten the bolts to 22 N.m (16 lb ft).

  7. Install the camshaft reluctor to the camshaft gear.
  8. Install the camshaft reluctor bolts.

    Tighten:  Tighten the bolts in a cross-bolt pattern to 9 N.m (80 lb in).

    9. Fig 4: View Of Camshaft Reluctor & Bolts
    GM739316Courtesy of GENERAL MOTORS CORP.
  9. Reinstall J 44643  in the starter opening, if removed.
    10. Fig 5: Locking Flywheel Using J 44643
    GM660308Courtesy of GENERAL MOTORS CORP.
  10. Install a NEW camshaft gear bolt.

    Tighten:  Tighten the bolt to 234 N.m (173 lb ft).

  11. Using J 26900-12  (1) and J 26900-13  (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.
    12. Fig 6: Measuring Camshaft End Play Using J 26900-12 & J 26900-13
    GM738903Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not damage the teeth on the crankshaft reluctor.
  12. Install the oil pump drive gear and reluctor to the crankshaft.
    13. Fig 7: View Of Oil Pump Drive Gear
    GM738904Courtesy of GENERAL MOTORS CORP.
  13. Install the oil pump driven gear.
  14. Install the oil pump driven gear nut.

    Tighten:  Tighten the nut to 100 N.m (74 lb ft).

    15. Fig 8: View Of Oil Pump Driven Gear & Nut
    GM738905Courtesy of GENERAL MOTORS CORP.
  15. Install the engine front cover. Refer to Engine Front Cover Replacement .
  16. Install the starter. Refer to Starter Motor Replacement (6.6L (LLY) Engine) in Engine Electrical.
  17. Install the A/C condenser. Refer to Condenser Replacement in Heating, Ventilation, and Air Conditioning.
  18. Install the charged air cooler. Refer to Charged Air Cooler Replacement .
  19. Install the valve lifters. Refer to Valve Lifter Replacement .
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