Notice: Refer to Fastener Notice in the Preface section.
Important:
| • | The alignment of the structural oil pan is critical. The rear bolt hole
locations of the oil pan provide mounting points for the transmission housing.
To ensure the rigidity of the powertrain and correct transmission alignment,
it is important that the rear of the block and the rear of the oil pan are
flush or even. The rear of the oil pan must NEVER protrude beyond the engine
block and transmission housing plane. |
| • | DO NOT use the oil pan gasket again. |
| • | It is not necessary to rivet the NEW gasket to the oil pan. |
- Install the oil pan baffle and bolts.
Tighten
Tighten the oil pan baffle bolts to 12 N·m (106 lb in).
- Apply a 5 mm (0.2 in)
bead of sealant GM P/N 12378190 or equivalent, 20 mm
(0.8 in) long to the engine block. Apply the sealant directly onto
the tabs of the front cover gasket that protrude into the oil pan surface.
Refer to
Sealers, Adhesives, and Lubricants
.
- Apply a 5 mm (0.2 in)
bead of sealant GM P/N 12378190 or equivalent, 20 mm
(0.8 in) long to the engine block. Apply the sealant directly onto
the tabs of the rear cover gasket that protrude into the oil pan surface.
Refer to
Sealers, Adhesives, and Lubricants
.
Important: Be sure to align the oil gallery passages in the oil pan and engine
block properly with the oil pan gasket.
- Preassemble the oil pan gasket to the pan.
| 4.1. | Install the gasket onto the oil pan. |
| 4.2. | Install the oil pan bolts to the pan and through the gasket. |
- Install the oil pan, gasket and bolts to the engine block.
- Tighten bolts finger tight. Do not overtighten.
- Place a straight edge across the rear of the engine block and
the rear of the oil pan at the transmission housing mounting surfaces.
- Align the oil pan until the rear of engine block and rear of oil pan
are flush or even.
Tighten
- Tighten the oil pan-to-block and oil pan-to-front
cover bolts to 25 N·m (18 lb ft).
- Tighten the oil pan-to-rear cover bolts to 12 N·m
(106 lb in).
- Measure the oil pan-to-engine block alignment.
| 9.1. | Place a straight edge across the rear of the engine block and
rear of oil pan at the transmission housing mounting surfaces. |
| | Important: The rear of the oil pan must NEVER protrude beyond the engine block
and transmission housing mounting surfaces.
|
| 9.2. | Insert a feeler gage between the straight edge and the oil pan transmission
housing mounting surface and check to make sure that there is no more than
a 0.25 mm (0.01 in) gap between the pan and straight edge. |
| 9.3. | If the oil pan alignment is not within specifications, remove
the oil pan and repeat the above procedure. |
