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Timing Chain and Sprockets Removal

WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

J 5825-A  Crankshaft Gear Remover

  1. Remove the crankshaft position sensor reluctor ring.
    Fig 1: Crankshaft Position Sensor Reluctor Ring
    G01689602Courtesy of GENERAL MOTORS CORP.
  2. Check the camshaft timing chain free play.
    1. 2.1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (2).
    2. 2.2. Measure the free play on the slack side (3) of the camshaft timing chain.

      If the camshaft timing chain can be moved side to side in excess of 11 mm (0.43 in), replacement of the camshaft timing chain and the sprockets is recommended during assembly.

    Fig 2: Camshaft Timing Chain Free Play
    G01689603Courtesy of GENERAL MOTORS CORP.
  3. Remove the camshaft sprocket bolts.
    Fig 3: Camshaft Sprocket Bolts
    G01689604Courtesy of GENERAL MOTORS CORP.
  4. Remove the camshaft sprocket and the camshaft timing chain.
    Fig 4: Camshaft Sprocket & Timing Chain
    G01689605Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to SAFETY GLASSES CAUTION .
  5. Remove the crankshaft sprocket using the J 5825-A  .
    Fig 5: Removing Crankshaft Sprocket Using J 5825-A
    G01689606Courtesy of GENERAL MOTORS CORP.
  6. Remove the crankshaft balancer key.
    Fig 6: Crankshaft Balancer Key
    G01689607Courtesy of GENERAL MOTORS CORP.