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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> ENGINE MECHANICAL - 4.8L, 5.3L, AND 6.0L (2 Of 4) >> On-Vehicle Repair Instructions >> Crankshaft Balancer Replacement (5.3L Engine w/RPO HP2) >> Installation Procedure

Installation Procedure

    IMPORTANT:
    • Make sure that the teeth of J 42386-A  mesh with the teeth of the engine flywheel. See Special Tools .
    • The used crankshaft balancer bolt will be used only during the first pass of the balancer installation procedure. Install a NEW bolt and tighten as described in the second, third, and forth passes of the balancer bolt tightening procedure.
    • The crankshaft balancer installation and bolt tightening involves a 4-stage tightening process. The first pass ensures that the balancer is installed completely onto the crankshaft. The second, third, and forth passes tighten the new bolt to the proper torque.
    IMPORTANT: The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.
    Fig 1: View Of Crankshaft Balancer
    GM832975Courtesy of GENERAL MOTORS CORP.
  1. Install the crankshaft balancer onto the end of the crankshaft.
    2. Fig 2: Installing Balancer Using J 41665
    GM63187Courtesy of GENERAL MOTORS CORP.
  2. Use the J 41665  in order to install the crankshaft balancer. See Special Tools .
    1. Assemble the threaded rod, nut, washer, and installer.

      Insert the smaller end of the installer into the front of the balancer.

    2. Use a wrench and hold the hex end of the threaded rod.
    3. Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft.
    4. Remove the tool and reverse the installation tool.

      Position the larger end of the installer against the front of the balancer.

    5. Use a wrench and hold the hex end of the threaded rod.
    6. Use a second wrench and rotate the installation tool nut clockwise until the balancer is installed onto the crankshaft.
    7. Remove the balancer installation tool.
    3. Fig 3: View Of Crankshaft Balancer Bolt
    GM832974Courtesy of GENERAL MOTORS CORP.
  3. Install the used crankshaft balancer bolt.

    Tighten:  Tighten the USED crankshaft balancer bolt to 330 N.m (240 lb ft).

    4. IMPORTANT: The nose of the crankshaft should be recessed 2.4-4.48 mm (0.094-0.176 in) into the balancer bore.
  4. Remove the used crankshaft balancer bolt.
  5. Measure for a correctly installed balancer.

    If the balancer is not installed to the proper dimensions, install the J 41665  and repeat the installation procedure. See Special Tools .

  6. Install a NEW crankshaft balancer bolt.

    Tighten: 

    1. Tighten the bolt a first pass to 50 N.m (37 lb ft).
    2. Tighten the bolt a second pass to 140 degrees using J 45059  .

  7. Remove the J 46093  (1) and bolts. See Special Tools .
    Fig 4: View Of J 46093 & Bolt
    GM1277133Courtesy of GENERAL MOTORS CORP.
    8. Fig 5: View Of Passenger Side Closeout & Bolt
    GM1195704Courtesy of GENERAL MOTORS CORP.
  8. Install the passenger side closeout and bolt.

    Tighten:  Tighten the bolt to 12 N.m (106 lb in).

  9. Lower the vehicle.
  10. Install the fan shroud - lower. Refer to Fan Shroud Replacement - Lower in Engine Cooling.
  11. Install the A/C drive belt. Refer to Drive Belt Replacement - Air Conditioning .
  12. Engage the ESB service disconnect/connect. Refer to Energy Storage Box (ESB) Service Disconnect/Connect (5.3L Engine w/RPO HP2) in Engine Electrical.
  13. Perform the crankshaft position (CKP) system variation learn procedure. Refer to CKP System Variation Learn Procedure in Engine Controls - 4.8L, 5.3L, and 6.0L.
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