Chevrolet Silverado / GMC Sierra. Service manual — part 461

Courtesy of GENERAL MOTORS CORP.

45. If replacing the turbocharger, remove the oil return pipe bolts, pipe and gasket. Discard the

gasket.

46. Clean all turbocharger to engine gasket mating surfaces.

47. If required, clean and inspect the turbocharger. Refer to Turbocharger Cleaning and

Inspection

Installation Procedure

2008 Chevrolet Silverado 1500

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

Fig. 164: View Of Oil Return Pipe Bolts
Courtesy of GENERAL MOTORS CORP.

1. If the turbocharger was replaced, install the oil return pipe, bolts, and a NEW gasket.

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

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Fig. 165: View Of Oil Feed Pipe Bolt, Washer & Pipe
Courtesy of GENERAL MOTORS CORP.

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

2. Install the oil feed pipe, washer, and bolt, if necessary.

Tighten: Tighten the bolt to 34 N.m (25 lb ft).

3. Install the turbocharger lower heat shield, if necessary.

IMPORTANT: Lubricate the washer with diesel fuel prior to installing.

2008 Chevrolet Silverado 1500

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