Chevrolet Silverado / GMC Sierra. Service manual — part 642

Fig. 96: View Of Oil Cooler Adapter
Courtesy of GENERAL MOTORS CORP.

1. Install the oil cooler adapter with gaskets to the oil cooler.

2. Install the oil cooler adapter to oil cooler bolts.

Tighten: Tighten the oil cooler adapter to oil cooler bolts to 21 N.m (15 lb ft).

3. Apply a 2-3 mm wide by 0.5-1.5 mm high bead of GM P/N 12378521 (Canadian P/N

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

88901148) sealant to the engine block mating surface.

Fig. 97: View Of Flywheel Housing
Courtesy of GENERAL MOTORS CORP.

4. Install the flywheel housing to the cylinder block.

5. Install the flywheel housing bolts.

Tighten: Tighten the flywheel housing bolts to 80 N.m (60 lb ft)

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 98: View Of Turbocharger Oil Return Pipe Nuts
Courtesy of GENERAL MOTORS CORP.

6. Install a new gasket to the turbocharger oil return pipe.

7. Install the turbocharger oil return pipe to flywheel housing studs.

Tighten: Tighten the turbocharger oil return pipe to flywheel housing studs to 10 N.m (89
lb in).

8. Install the turbocharger oil return pipe nuts.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Tighten: Tighten the turbocharger oil return pipe nuts to 25 N.m (18 lb ft).

UPPER OIL PAN INSTALLATION

Fig. 99: Determining Sealant Bead Dimensions
Courtesy of GENERAL MOTORS CORP.

1. Apply a 2-3 mm wide by 0.5-1.5 mm bead of GM P/N 12378521 (Canadian P/N

88901148) sealant to the upper oil pan mating surfaces.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado