Crankshaft Balancer Installation (RPO HP2)

Tools Required

• J 41665  Crankshaft Balancer and Sprocket Installer
• J 45059  Angle Meter
• J 46093  Rotor and Flexplate Holding Tool

NOTE: Refer to Fastener Notice in Cautions and Notices.
IMPORTANT:
• On vehicles equipped with RPO HP2, the rotor and flexplate of the electric drive unit MUST be installed to the rear of the engine prior to crankshaft balancer installation.
• The crankshaft balancer installation and bolt tightening involves a four stage tightening process. The first pass ensures that the crankshaft balancer is completely installed onto the crankshaft. The second, third and fourth passes tighten the new bolt to the proper torque.
• The used crankshaft balancer bolt is used only during the first pass of 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.
1. Install the J 46093  (1) and bolts. The flange of the tool should locate into the hole in the flexplate. Use two M10 - 1.5 x 40 mm bolts for proper tool operation.

   Tighten:  Tighten the bolts to 50 N.m (37 lb ft).

Fig 1: View Of J 46093 & Bolts (RPO HP2)
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.
2. Install the balancer onto the end of the crankshaft.
Fig 2: Crankshaft Balancer And Retaining Bolt
Courtesy of GENERAL MOTORS CORP.
3. Use the J 41665  in order to install the balancer.
   1. Assemble the threaded rod, nut, washer and installer.
   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 crankshaft.
   4. Remove 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.
Fig 3: Installing Balancer Using J 41665
Courtesy of GENERAL MOTORS CORP.
4. Install the used crankshaft balancer bolt.

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

5. Remove the used crankshaft balancer bolt.
IMPORTANT: The nose of the crankshaft should be recessed 2.4-4.48 mm (0.094-0.176 in) into the balancer bore.
6. 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: Identifying Hub To Crankshaft Distance
Courtesy of GENERAL MOTORS CORP.
7. Install the NEW crankshaft balancer bolt.

   Tighten: 

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

Fig 5: Crankshaft Balancer And Retaining Bolt
Courtesy of GENERAL MOTORS CORP.
8. Remove the J 46093  .