GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 41478 Crankshaft Front Oil Seal Installer
    • J 41665 Crankshaft Balancer and Sprocket Installer
    • J 42386-A Flywheel Holding Tool
    • J 45059 Angle Meter

    Object Number: 1950866  Size: SH
  1. Use J 41665  (1) to install the crankshaft balancer (2).
  2. 1.1. Assemble the threaded rod, nut, washer and installer.

    Insert the smaller end of the installer into the front of the crankshaft balancer (2).

    1.2. Use a wrench and hold the hex end of the threaded rod.
    1.3. Use a second wrench and rotate the installation tool nut clockwise, until the crankshaft balancer (2) is started onto the crankshaft.
    1.4. Remove the tool and reverse the installation tool.

    Position the larger end of the installer against the front of the crankshaft balancer (2).

    1.5. Use a wrench and hold the hex end of the threaded rod.
    1.6. Use a second wrench and rotate the installation tool nut clockwise, until the crankshaft balancer (2) is installed onto the crankshaft.
    1.7. Remove the J 41665  (1).

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1950870  Size: SH
  3. Install the used crankshaft balancer retaining bolt (1).
  4. Tighten
    Tighten the bolt to 330 N·m (240 lb ft).

  5. Remove the used crankshaft balancer retaining bolt (1).

  6. Object Number: 1950867  Size: SH
  7. Measure the distance the balancer protrudes from the crankshaft nose and ensure dimension (A) is to specification
  8. Specification
    Dimension (A): 2.4-4.48 mm (0.094-0.176 in)

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

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1950870  Size: SH
  9. Install the NEW crankshaft balancer retaining bolt (1).
  10. Tighten

        • First Pass: Tighten the bolts to 50 N·m (37 lb ft).
        • Final Pass: Tighten an additional 140 degrees using the J 45059 .

    Object Number: 1950869  Size: SH
  11. Remove the J 42386-A to cylinder block retaining bolts (2).
  12. Remove the J 42386-A  (1).

  13. Object Number: 1954100  Size: SH
  14. Install the right transmission cover (1).
  15. Notice: Refer to Fastener Notice in the Preface section.

  16. Install the right transmission cover (1) to engine oil pan retaining bolt (2).
  17. Tighten
    Tighten the bolt to 12 N·m(106 lb in).