Chevrolet Silverado / GMC Sierra. Service manual — part 460

Fig. 160: View Of Turbocharger Oil Feed Pipe Banjo Bolt
Courtesy of GENERAL MOTORS CORP.

36. Remove the turbocharger oil feed pipe banjo bolt and washer.

NOTE:

Do not twist the turbocharger oil feed pipe. Twisting of the feed
pipe will result in the collapse and deformation of the plastic
pipe, restricting oil flow and causing turbocharger damage.
During turbocharger replacement, gently push the oil feed pipe
towards the front of the engine to clear the turbocharger.
Assistance may be required to keep the pipes clear of the
turbocharger during removal or installation.

2008 Chevrolet Silverado 1500

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

37. Reposition the oil feed pipe out of the way.

38. Remove the turbocharger oil return pipe nuts at the top of the flywheel housing.

Fig. 161: View Of Turbocharger W/Oil Return Pipe
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

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

39. Remove the turbocharger bolts.

40. Remove the turbocharger (with the oil return pipe).

41. Remove and discard the turbocharger oil return pipe gasket at the flywheel housing.

Fig. 162: View Of Oil Feed Pipe Bolt, Washer & Pipe
Courtesy of GENERAL MOTORS CORP.

42. Remove the turbocharger lower heat shield, if necessary.

43. Remove the oil feed pipe bolt, washer, and pipe, if necessary.

44. If the turbocharger has failed, perform the following steps the verify the condition of the

2008 Chevrolet Silverado 1500

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

number 4 camshaft bearing before installing a new turbocharger:

1. Visually inspect for correct alignment of the number 4 camshaft bearing oil hole

through the turbocharger oil supply hole in the block.

2. Turn the engine over by hand 1/2 turn and inspect for camshaft bearing movement,

indicating a spun camshaft bearing.

3. If the bearing is spun the engine MUST be replaced.

Fig. 163: View Of Oil Return Pipe Bolts

2008 Chevrolet Silverado 1500

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