For 1990-2009 cars only
- Install the oil cooler adapter with gaskets to the oil cooler.
- Install the oil cooler adapter to oil cooler bolts and tighten to 21 N·m (15 lb ft).
- 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 and tighten to 80 N·m (60 lb ft).
- Install a new gasket to the turbocharger oil return pipe.
- Install the turbocharger oil return pipe to flywheel housing studs. Tighten the turbocharger oil return pipe to flywheel housing studs to 10 N·m (89 lb in).
- Install the turbocharger oil return pipe nuts and tighten to 25 N·m (18 lb ft).
Caution: Refer to Fastener Caution in the Preface section.
