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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 437 (Engine Mechanical - 4.8L, 5.3L, & 6.0L (On-Vehicle)) >> Repair Instructions >> Timing Chain and Sprockets Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: View Of Crankshaft Key & Keyway
    GM156149Courtesy of GENERAL MOTORS CORP.
  1. Install the key into the crankshaft keyway, if previously removed.
    2. Fig 2: View Of Crankshaft Sprocket Key Installation Position
    GM490871Courtesy of GENERAL MOTORS CORP.
  2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.
    3. Fig 3: View Of Crankshaft Sprocket
    GM156150Courtesy of GENERAL MOTORS CORP.
  3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.
    4. Fig 4: Using J 41665 To Install Crankshaft Sprocket
    GM63199Courtesy 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.
    6. Fig 5: Camshaft Sprocket, Bolt & Timing Chain
    GM63263Courtesy 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.
    7. Fig 6: View Of Camshaft & Crankshaft Sprockets Timing Marks Aligned
    GM156158Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  7. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.
  8. Install the camshaft sprocket bolts.

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

  9. Install the oil pump. Refer to Oil Pump, Pump Screen and Deflector Replacement .
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