- Make sure that the oil pan and mounting surface on the lower crankcase are free of all oil and debris.
- Apply a 3.5 mm bead of GM P/N 12378521 (Canadian P/N 88901148) or equivalent around the perimeter of the oil pan and the oil suction port opening.
- Install the oil pan.
- Install the oil pan bolts.
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.
Tighten
Tighten the oil pan bolts to 25 N·m (18 lb ft) in sequence.
- Apply a 2.25 mm bead of sealer (1) on the level part of the flange next to the chamfer around the perimeter of the oil pan and the oil suction port opening. Refer to Adhesives, Fluids, Lubricants, and Sealers.
- Install the oil pan.
- Install the oil pan bolts and tighten to 25 N·m (18 lb ft) in sequence.
Note:
• The lower crankcase surface must be free of contamination prior to applying the sealer. • Install and align the oil pan to block within 20 minutes of applying the sealer. • The oil pan must be fastened to final torque specification within 60 minutes of applying the sealer.
Caution: Refer to Fastener Caution in the Preface section.
