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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 748 (Engine Mechanical - 3.1L (On-Vehicle)) >> Repair Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. 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. Place the #1 piston at top dead center (#4 firing position).
  3. Align the mark on the camshaft sprocket (4) with the timing mark on the bottom of the timing chain dampener (1).
    Fig 1: Aligning Camshaft Sprocket To Timing Chain Dampener
    G01810974Courtesy of GENERAL MOTORS CORP.
  4. Remove the camshaft sprocket bolt.
  5. Remove the camshaft sprocket (4).
  6. Remove the timing chain (3).
    Fig 2: Removing Camshaft Sprocket & Timing Chain
    G01810975Courtesy of GENERAL MOTORS CORP.
  7. Remove timing chain dampener.
    Fig 3: Removing Timing Chain Dampener
    G01810976Courtesy of GENERAL MOTORS CORP.

    Important:  If the sprocket does not remove easily, lightly knock the lower edge of the sprocket using a plastic mallet in order to dislodge the sprocket.

  8. Remove the crankshaft sprocket using the J 5825-A. 
    Fig 4: Removing Crankshaft Sprocket
    G01810977Courtesy of GENERAL MOTORS CORP.