Installation Procedure
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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 bellhousing. 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 must NEVER protrude beyond the engine block and transmission bellhousing plane.
- Do not reuse the oil pan gasket.
- It is not necessary to rivet the NEW gasket to the oil pan.
- Apply a 5 mm (0.20 in) bead of sealant GM P/N United States 12378190, or equivalent 20 mm (0.80 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface.
- Apply a 5 mm (0.20 in) bead of sealant GM P/N United States 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 protrudes into the oil pan surface.
Important: Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.
- Pre-assemble the oil pan gasket to the pan.
- Install the gasket onto the pan.
- Install the oil pan bolts to the pan and through the gasket.
- Install the oil pan, gasket and bolts to the engine block.
- Tighten the oil pan bolts until snug. Do not overtighten.
- Install the transmission converter cover bolts until snug, if equipped with the 4L80-E automatic transmission.
- Install the transmission bolt and stud on the right side until snug, If equipped with the 4L60-E automatic transmission.
CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
- Install the bottom bolt on the left side until snug.
Tighten
- Tighten the 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).
- Tighten the converter cover, and transmission bolts/stud to 50 N.m (37 lb ft).
- Install the positive battery cable clip bolt.
Tighten
Tighten the bolt to 9 N.m (80 lb in).
- Slide the channel pin into the oil pan tab.
- Install the battery cable channel bolt.
Tighten
Tighten the bolt to 12 N.m (106 lb in).
- Connect the oil level sensor electrical connector (6).
- Install the transmission cover and bolt.
Tighten
Tighten the bolt to 12 N.m (106 lb in).
- Install the crossbar.
- Install the crossbar bolts.
Tighten
Tighten the bolts to 100 N.m (74 lb ft).
- Install the transmission cover bolt.
Tighten
Tighten the bolt to 12 N.m (106 lb in).
- Raise the front drive axle into position.
- If equipped with AWD, install the differential carrier upper mounting bolt and nut until snug. Do not tighten at this time.
- If equipped with AWD, install the differential carrier lower mounting bolt and nut.
Tighten
Tighten the bolts to 100 N.m (75 lb ft).
- If equipped with AWD, install the inner axle housing washers and nuts to the bracket.
Tighten
Tighten the nuts to 100 N.m (75 lb ft).
- Remove the jack from the front drive axle.
- Install new engine oil and a new oil filter. Refer to Engine Oil and Oil Filter Replacement .