Installation Procedure

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.

1. Using the old balancer as a reference, mark or scribe the NEW balancer in the same location (if required).

   Refer to ENGINE BALANCING 

   Fig 1: Installing Balance Weights

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

   Refer to CRANKSHAFT BALANCER CLEANING AND INSPECTION 

   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.
   Fig 2: Installing Balancer Onto End Of Crankshaft

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4. Use the J 41665  in order to install the crankshaft balancer.
   Fig 3: Installing Crankshaft Balancer

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   1. 4.1. Assemble the threaded rod, nut, washer and installer.

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

   2. 4.2. Use a wrench and hold the hex end of the threaded rod.
   3. 4.3. Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft.
   4. 4.4. Remove the tool and reverse the installation tool.

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

   5. 4.5. Use a wrench and hold the hex end of the threaded rod.
   6. 4.6. Use a second wrench and rotate the installation tool nut clockwise until the balancer is installer onto the crankshaft.
   7. 4.7. Remove the balancer installation tool.
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 installed balancer.

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

   Fig 4: Measuring For Correctly Installed Balancer

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8. Install the NEW crankshaft balancer bolt.
   Fig 5: Installing Crankshaft Balancer Bolt

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   Tighten 

   1. 8.1. Tighten the new crankshaft balancer bolt a first pass to 50 N.m (37 lb ft).
   2. 8.2. Tighten the new crankshaft balancer bolt a second pass to 140 degrees using the J 36660-A  .
9. Remove the J 42386-A  and bolts.
   Fig 6: Removing J 42386-A And Bolts

   Courtesy of GENERAL MOTORS CORP.
10. Install the right transmission cover and bolt.
    Fig 7: Installing Right Transmission Cover And Bolt

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    Tighten 

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

11. Install the starter motor. Refer to STARTER MOTOR 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 CRANKSHAFT POSITION SENSOR .