Chevrolet Silverado / GMC Sierra. Service manual — part 595

Tighten: Tighten the turbocharger oil return pipe bolts to 21 N.m (15 lb ft).

Fig. 66: View Of Cooling Outlet Hose Eye Bolts
Courtesy of GENERAL MOTORS CORP.

11. Inspect the coolant outlet lines for damage.

IMPORTANT: If the cooling outlet hose eye bolts were removed, install the

longer bolt (1) with two holes, in the top location. Install the
shorter bolt (2) in the lower location.

2008 Chevrolet Silverado 1500

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

Fig. 67: View Of Turbocharger Inlet Duct Inspection Areas
Courtesy of GENERAL MOTORS CORP.

12. Clean the turbocharger inlet duct.

13. Clean the turbocharger inlet duct mating surfaces.

14. Inspect the turbocharger inlet duct for cracks.

15. Inspect the turbocharger inlet duct mating surfaces for damage.

16. Replace the turbocharger inlet duct if any damage is found.

Tighten: Tighten the inlet duct clamp to 5 N.m (44 lb in).

2008 Chevrolet Silverado 1500

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

ENGINE FLYWHEEL HOUSING CLEANING AND INSPECTION

Fig. 68: View Of Flywheel Housing O-Ring Seals
Courtesy of GENERAL MOTORS CORP.

1. Remove the O-rings from the flywheel housing and discard.

2. Clean the flywheel housing.

3. Clean the flywheel housing mating surfaces.

2008 Chevrolet Silverado 1500

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

4. Clean the flywheel housing O-ring sealing area.

5. Inspect the flywheel housing for cracks.

6. Inspect the flywheel housing mating surfaces for damage.

7. Inspect the crankshaft rear oil seal bore for damage.

8. Replace the flywheel housing if any damage is found.

WATER PUMP CLEANING AND INSPECTION

2008 Chevrolet Silverado 1500

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