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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1619 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Timing Chain and Sprockets Installation >> Tools Required

Tools Required

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J 41665  Crankshaft Balancer and Sprocket Installer

  1. Install the key into the crankshaft keyway, if previously removed.
    Fig 1: Crankshaft Keyway & Key
    G02107209Courtesy of GENERAL MOTORS CORP.
  2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.
    Fig 2: Tap Key Into Keyway
    G02107210Courtesy of GENERAL MOTORS CORP.
  3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.
    Fig 3: Installing Crankshaft Sprocket
    G02107211Courtesy of GENERAL MOTORS CORP.
  4. Use the J 41665  in order to install the crankshaft sprocket.

    Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.

  5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.
    Fig 4: Installing Crankshaft Sprocket Using J 41665
    G02107212Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Properly locate the camshaft sprocket locating pin with the camshaft sprocket alignment hole.
    • The sprocket teeth and timing chain must mesh.
    • The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.

    Locate the camshaft sprocket alignment mark in the 6 o'clock position.

  6. Install the camshaft sprocket and timing chain.
    Fig 5: Installing Camshaft Sprocket & Timing Chain
    G02107213Courtesy of GENERAL MOTORS CORP.
  7. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.
    NOTE: Refer to FASTENER NOTICE .
  8. Install the camshaft sprocket bolts.

    Tighten 

    Tighten the camshaft sprocket bolts to 35 N.m (26 lb ft).

    Fig 6: Aligning Timing Marks On Camshaft Or Crankshaft Sprockets
    G02107214Courtesy of GENERAL MOTORS CORP.