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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1675 (Engine Mechanical - 3.1L V6 - VIN (J)) >> Repair Instructions >> On-Vehicle repair Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Buick Century. 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. Rotate the crankshaft until the timing marks in the following locations are aligned:
    • The timing chain dampener to the crankshaft sprocket (2).
    • The timing chain dampener to the camshaft sprocket locator hole (1).
      Fig 1: Aligning Timing Marks
      G01967948Courtesy of GENERAL MOTORS CORP.
  3. Remove the camshaft sprocket bolt.
    Fig 2: Removing Camshaft Sprocket Bolt
    G01967949Courtesy of GENERAL MOTORS CORP.
  4. Remove the camshaft sprocket with the timing chain.
    Fig 3: Removing Camshaft Sprocket With Timing Chain
    G01967950Courtesy of GENERAL MOTORS CORP.
  5. Remove the crankshaft sprocket.
    Fig 4: Removing Crankshaft Sprocket
    G01967951Courtesy of GENERAL MOTORS CORP.
  6. Remove the timing chain dampener bolts.
    Fig 5: Removing Timing Chain Dampener & Bolt
    G01967952Courtesy of GENERAL MOTORS CORP.
  7. Remove the timing chain dampener.
  8. If necessary remove the camshaft thrust plate screws.
    Fig 6: Removing Camshaft Thrust Plate & Screws
    G01967953Courtesy of GENERAL MOTORS CORP.
  9. Remove the camshaft thrust plate.