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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1302 (Engine Mechanical (Repair Instructions 1 Of 3) - 5.7L) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1 >> On-Vehicle Repair Instructions >> Crankshaft Balancer Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • The used crankshaft balancer bolt will be used only during the first pass on the balancer installation procedure. Install a NEW crankshaft balancer bolt and tighten as described in the second, third and fourth passes of the balancer bolt tightening procedure.
  • The crankshaft balancer installation and bolt tightening involves a four stage tightening process. The first pass ensures that the balancer is installed completely onto the crankshaft. The third, and fourth passes tighten the new bolt to the proper torque.
    Fig 1: Installing/Removing Balancer Weights In Crankshaft Balancer
    GM63153Courtesy of GENERAL MOTORS CORP.
  1. Using the old balancer as a reference, mark or scribe the NEW balancer in the same location (if required).

    Refer to Engine Balancing

  2. Install balance weights into the NEW balancer (if required).

    Refer to Crankshaft Balancer Cleaning and Inspection

    3. Fig 2: Identifying Harmonic Balancer Bolt
    GM64275Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Align the scribe mark on the balancer with the scribe mark on the crankshaft.
    The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.
  3. Install the balancer onto the end of the crankshaft.
    4. Fig 3: Installing Balancer Using J 41665
    GM63187Courtesy of GENERAL MOTORS CORP.
  4. Use the J 41665  in order to install the crankshaft balancer.
    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 installer onto the crankshaft.
    7. Remove the balancer installation tool.
    5. Fig 4: Identifying Hub To Crankshaft Distance
    GM63245Courtesy of GENERAL MOTORS CORP.
  5. Install the used crankshaft balancer bolt.

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

  6. Remove the used crankshaft balancer bolt.
    IMPORTANT: The nose of the crankshaft should be recessed 2.40-4.48 mm (0.094-0.176 in) into the balancer bore.
  7. Measure for a correctly installer balancer.

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

    8. Fig 5: Identifying Harmonic Balancer Bolt
    GM64275Courtesy of GENERAL MOTORS CORP.
  8. Install the NEW crankshaft balancer bolt.

    Tighten: 

    1. Tighten the new crankshaft balancer bolt a first pass to 50 N.m (37 lb ft).
    2. Tighten the new crankshaft balancer bolt a second pass to 140 degrees using the J 36660-A .

    9. Fig 6: J 42386-A, Crankshaft Balancer & Bolt
    GM156162Courtesy of GENERAL MOTORS CORP.
  9. Remove the J 42386-A  and bolts.
    10. Fig 7: Right Transmission Cover & Bolt
    GM208464Courtesy of GENERAL MOTORS CORP.
  10. Install the right transmission cover and bolt.

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

  11. Install the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
  12. Install the power steering gear. Refer to Power Steering Gear Replacement in Power Steering System.
  13. Install the A/C drive belt. Refer to Drive Belt Replacement - Air Conditioning .
  14. Perform the crankshaft position (CKP) system variation learn procedure. Refer to CKP System Variation Learn Procedure in Engine Controls - 5.7 L.
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