Chevrolet Silverado / GMC Sierra. Manual — part 491

Fig. 267: View Of Turbocharger Oil Return Pipe Nuts
Courtesy of GENERAL MOTORS CORP.

1. Drain the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill) or

Cooling System Draining and Filling (Static Fill) .

2. Remove the crankshaft rear oil seal. Refer to Crankshaft Rear Oil Seal Replacement.

3. Remove the turbocharger oil return pipe nuts from the top of the flywheel housing.

Fig. 268: View Of Oil Filter
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

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

4. Remove the upper oil pan. Refer to Upper Oil Pan Replacement.

5. Remove the oil filter.

Fig. 269: View Of Engine Rear Cover Bolts & Flywheel Housing To Upper Oil Pan
Bolts
Courtesy of GENERAL MOTORS CORP.

6. Remove the flywheel housing bolts, denoted by the black circles.

7. Separate the flywheel from the cylinder block using J 37228 . See Special Tools .

8. Remove the flywheel housing.

2008 Chevrolet Silverado 1500

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

Fig. 270: View Of Oil Cooler Adapter
Courtesy of GENERAL MOTORS CORP.

9. Remove the turbocharger oil return pipe gasket from the flywheel housing.

10. Remove the oil cooler adapter bolts.

11. Remove the oil cooler adapter and gaskets.

12. If required, clean and inspect the flywheel housing. Refer to Engine Flywheel Housing

Cleaning and Inspection .

Installation Procedure

2008 Chevrolet Silverado 1500

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

Fig. 271: View Of Flywheel Housing O-Ring Seals
Courtesy of GENERAL MOTORS CORP.

1. Install NEW O-ring seals to the flywheel housing, if necessary.

2008 Chevrolet Silverado 1500

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