Case Extension/Scavenge Pipe Inspect and Install

1. Inspect the scavenge tube (54) for damage and clogging.





2. Install the scavenge tube seal (53) into the case. Then install the scavenge tube into the case and seal. Tap lightly with a plastic hammer to ensure a tight fit in both seals. Install the scavenge tube bolt (15).

Tighten
- Tighten the bolt to 8-14 N.m (6-10 lb. ft.).





3. Inspect the case to case extension seal (126).
4. Inspect the case extension mating surface for damage.





5. Install the following parts:
- The selective washer (133)
- The thrust washer (132)
- The case extension seal (126)
- The case extension (134)





6. Install the case extension bolts (128, 129).





7. Install the stud (127).
- Apply GM sealing adhesive 12346004 before reuse.

Tighten
- Tighten the bolt (128) and the stud (127) to 50-55 N.m (37-40 lb. ft.).
- Tighten the bolt (129) to 20-27 N.m (15-20 lb. ft.).