GM Service Manual Online
For 1990-2009 cars only

    Object Number: 2018102  Size: SH
  1. Install stiffening crankcase assembly.
  2. Place a new O-ring on the cylinder block as shown in the illustration.

  3. Object Number: 2018128  Size: SH
  4. With the No. 1 crank pin of the crankshaft placed at the 6 o'clock position, install the balanceshafts and align the adjusting holes (1) as shown in the illustration.

  5. Object Number: 2016221  Size: SH

    Note: Remove any oil from the contact surfaces. Install the crankcase within 3 minutes of applying seal packing. Do not add engine oil for at least 2 hours after installing the crankcase.

  6. Apply a continuous bead of sealant (1-4) (Diameter 2.5 to 3.0 mm (0.098 to 0.118 in)) as shown in the illustration.

  7. Object Number: 2016223  Size: SH
  8. Temporarily install the crankcase with the 11 bolts (1, 2).
  9. Caution: Refer to Fastener Caution in the Preface section.

  10. Uniformly tighten the bolts.
  11. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).


    Object Number: 2016639  Size: SH
  12. Confirm that the timing marks (1) on the balanceshafts are aligned when the key groove is placed at the 6 o'clock position, as shown in the illustration.