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 transfer tube, baffle and other internal components as required.
Refer to
Oil Pan Cleaning and Inspection
.
- 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.
Important: Ensure the oil gallery passages in the oil
pan and engine block properly align with the oil pan gasket.
- Pre-assemble 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.
Notice: Refer to Fastener Notice in the Preface section.
- 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 inspect to ensure there is no more than a 0.25 mm
(0.01 in) gap (a) 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. |
