GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN-48585 Crankshaft Balancer Guide
    • EN-48953 Camshaft Actuator Locking Tool
    • J 43653 Flywheel Holding Tool
    • J 45059 Angle Meter

For equivalent regional tools, refer to Special Tools


    Object Number: 1769524  Size: SH

    Caution: Ensure both components are aligned correctly or serious engine damage will occur.

  1. Install the balancer onto the EN-48585 guide . Use care to properly align the keyway and flats on the balancer with the oil pump drive.
  2. Install the crankshaft balancer into the end of the crankshaft.
  3. Ensure that J 43653 tool is installed and engaging the flywheel to prevent crankshaft rotation.
  4. Caution: Refer to Fastener Caution in the Preface section.

    Note: Always install a NEW crankshaft balancer retaining bolt.

  5. Install a NEW retaining bolt and tighten to 100 N·m (74 lb ft) plus 125 degrees using J 45059 meter .
  6. Remove J 43653 tool .

  7. Object Number: 2128100  Size: SH
  8. Install EN-48953 locking tool  (1) and tighten the bolts into the cylinder head to 10 N·m (89 lb in).
  9. Release the timing chain tensioner by applying 45 N·m (33 lb ft) counterclockwise torque to the crankshaft balancer bolt.
  10. Remove EN-48953 locking tool .