- Install the oil cooler adapter with gaskets to the oil cooler.
- Install the oil cooler adapter to oil cooler bolts.
- Apply a 2-3 mm wide by 0.5-1.5 mm high bead of GM P/N 12378521 (Canadian P/N 88901148) sealant to the engine block mating surface.
- Install the flywheel housing to the cylinder block.
- Install the flywheel housing bolts.
- Install a new gasket to the turbocharger oil return pipe.
- Install the turbocharger oil return pipe to flywheel housing studs.
- Install the turbocharger oil return pipe nuts.
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 cooler adapter to oil cooler bolts to 21 N·m (15 lb ft).
Tighten
Tighten the flywheel housing bolts to 80 N·m (60 lb ft)
Tighten
Tighten the turbocharger oil return pipe to flywheel housing studs to 10 N·m (89 lb in).
Tighten
Tighten the turbocharger oil return pipe nuts to 25 N·m (18 lb ft).
