- Coat the pump side of the new oil pump gasket with a thin, even coating of GM P/N 1052942 or equivalent.
- Install the oil pump gasket.
- Install the oil pump and align with the guide pins (2).
- Coat the new oil pump bolts with GM P/N 12345493 or equivalent.
- Install the oil pump bolts.
- Install the collar.
- Coat the lip of the front main oil seal with a small amount of GM P/N 12377985 chassis grease, or equivalent, to aid in installation.
- Install the front main oil seal.
- Use the J 35268-A to tap the front main oil seal into place.
- Install the crankshaft drive gear.
- Install a new crankshaft drive gear bolt.
- Temporarily mount the generator and install the generator lower mounting bolt (3).
- Re-tighten the oil pump bolts in sequence.
- Remove the generator bolt and the generator.
Important: Do not cover and/or restrict the gasket openings and oil passages with sealant. Only apply sealant to the crosshatched area of the gasket as shown in the illustration.
Tighten
Tighten the oil pump bolts, using the sequence shown, to
12 N·m (9 lb ft).
Ensure the front main oil seal if fully and evenly seated.
Tighten
Tighten the crankshaft drive gear bolt, while counterholding with J 42065
, to 250 N·m
(184 lb ft) on the first pass, 45 degrees on the second
pass and 15 degrees on the third pass.
Important: The oil pump bolts must be re-tightened AFTER the generator mounting bolt has been tightened to specifications to allow for uniform compression of the oil pump gasket.
Tighten
Tighten the generator lower mounting bolt (3) to 35 N·m
(26 lb ft).
Tighten
Tighten the oil pump bolts to 20 N·m (15 lb ft).
