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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1023 (Engine Mechanical - 6.6L (Lb7) (Repair Instructions 1 Of 4)) >> Repair Instructions (On-Vehicle & Off Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Camshaft Reluctor Replacement >> Removal Procedure

Removal 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. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  2. Remove the upper oil pan. Refer to Oil Pan Replacement - Upper .
    3. NOTE: Do not use an impact driver to remove or install the oil pump driven gear nut. Use of an impact driver may shear the oil pump drive gear pin in the crankshaft.
  3. While holding the secondary oil pump shaft with a hex driver, remove the oil pump driven gear nut.
  4. Remove the oil pump driven gear.
    5. Fig 1: View Of Oil Pump Driven Gear & Nut
    GM738905Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not remove the reluctor from the oil pump drive gear. The reluctor is timed to the gear and once removed the correct timing will be lost.
  5. Remove the oil pump drive gear and crankshaft reluctor.
    • Do not remove the crankshaft reluctor bolts.
    • Do not damage the crankshaft reluctor teeth.
    6. Fig 2: View Of Oil Pump Drive Gear
    GM738904Courtesy of GENERAL MOTORS CORP.
  6. Remove the camshaft reluctor screws.
  7. Remove the camshaft reluctor.
    8. Fig 3: View Of Camshaft Reluctor & Bolts
    GM739316Courtesy of GENERAL MOTORS CORP.
  8. Inspect the camshaft reluctor for damage.
  9. Inspect the camshaft reluctor for being bent.
  10. Replace the reluctor if damage is found.
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