- Apply a small amount of sealer, GM P/N 12346141 or equivalent, 10 mm (0.393 in) wide and 20 mm (0.787 in) long to the engine front cover to engine block junction.
- Apply a small amount of sealer, GM P/N 12346141 or equivalent, 25 mm (1.00 in) long to the crankshaft rear oil seal housing to engine block junction.
- Install the oil pan gasket.
- Install the oil pan against to engine block.
- Slide oil pan back against straight edge usingJ 34673 or equivalent.
- Install oil pan bolts and nuts. Do not tighten.
- Install the bolts and nut using the following sequence:
- Tighten the bolts to 25 N·m (18 lb ft).
- Tighten the nuts to 25 N·m (18 lb ft).
- Measure the clearance again between the three oil pan- to-transmission bell housing contact points to verify proper alignment.
- Install the oil filter gasket.
- Oil filter adapter O-ring seal, if equipped.
- Oil filter adapter bolts.
- Inspect oil filter adapter bypass valve and spring for operation and cracks. If bypass valve looks damaged in any way replace the oil filter adapter assembly.
- Lubricate new oil filter seal with clean engine oil.
- Install a new oil filter.
Important: Apply the sealer, GM P/N 12346141 or equivalent 25 mm (1.0 in) in either direction of the radius cavity of the junctions.
Important: Always install a new oil pan gasket.
Important: Use a feeler gauge to check the clearance between the three oil pan-to-transmission bell housing contact points. If clearance exceeds 0.254 mm (0.010 in) at any of the three points repeat steps until the clearance is within specification.
Notice: The alignment of the mating components is crucial. An offset greater than 0.30 mm (0.011 in) between the rear faces of the oil pan and block is not acceptable. Offsets greater than 0.30 mm (0.011 in) will affect the alignment between the engine assembly and the transmission. Mis-alignment of the engine assembly to the transmission can lead to internal and external damage to the engine assembly and/or transmission.
Tighten
Tighten
Tighten the bolts to 20 N·m (15 lb ft).
Notice: 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.
