GM Service Manual Online
For 1990-2009 cars only

Tools Required

KM-470-B Angular Torque Gage

Removal Procedure


    Object Number: 1758631  Size: SH
  1. Remove the oil pan. Refer to Oil Pan Replacement .
  2. Remove the oil suction pipe with O-ring.
  3. Remove the oil pan scraper.

  4. Object Number: 1765846  Size: SH
  5. Remove the crankshaft balancer unit assembly retaining bolts.
  6. Remove the crankshaft balancer unit assembly and the shim.

Adjustment Procedure


    Object Number: 1758598  Size: SH
  1. Align the mark on the crankshaft gear with the notch at the bottom of the rear timing belt cover.

  2. Object Number: 1758696  Size: SH
  3. Turn the crankshaft gear using the crankshaft gear bolt so that the flattened sides (arrows) of both balancer shafts face the oil pan side and are on a horizontal line.

Installation Procedure


    Object Number: 1765846  Size: SH

    Important: Before installing the crankshaft balancer unit assembly, perform the crankshaft balancer unit adjustment for the proper operation.

  1. Carefully install the shim and the crankshaft balancer unit assembly.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the crankshaft balancer unit assembly retaining bolts.
  4. Tighten
    Tighten the crankshaft balancer unit assembly retaining bolts to 20 N·m (15 lb ft) and turn the bolts another 45 degrees using KM-470-B .


    Object Number: 1758631  Size: SH
  5. Install the oil pan scraper.
  6. Tighten
    Tighten the oil pan scraper retaining bolts to 8 N·m (71 lb in).

  7. Install the oil suction pipe with the new O-ring.
  8. Tighten
    Tighten the oil suction pipe retaining bolts to 8 N·m (71 lb in).

  9. Install the oil pan. Refer to Oil Pan Replacement .