Chevrolet Silverado / GMC Sierra. Service manual — part 448

18. Remove the right fuel injector pipes.

Fig. 116: View Of Upper Valve Rocker Arm Cover & Gasket
Courtesy of GENERAL MOTORS CORP.

19. Remove the upper valve rocker arm cover bolts.

20. Remove the upper valve rocker arm cover.

21. Remove the upper valve rocker arm cover gasket.

22. Inspect the upper valve rocker arm cover gasket for damage, replace if necessary. Otherwise

the fuel injector.

2008 Chevrolet Silverado 1500

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

reuse the old gasket.

23. If required, clean and inspect the upper valve rocker arm cover. Refer to Valve Rocker

Arm Cover Cleaning and Inspection - Upper .

Installation Procedure

Fig. 117: View Of Upper Valve Rocker Arm Cover & Gasket
Courtesy of GENERAL MOTORS CORP.

1. Install the upper valve rocker arm cover gasket.

2. Install the upper valve rocker arm cover.

3. Install the upper valve rocker arm cover bolts.

2008 Chevrolet Silverado 1500

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

Fig. 118: Upper Valve Rocker Arm Cover Bolts Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

4. Tighten the upper valve rocker arm cover bolts in the sequence shown.

Tighten: Tighten the bolts to 8 N.m (71 lb in).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Fig. 119: View Of Fuel Injector Pipes
Courtesy of GENERAL MOTORS CORP.

5. Install the fuel injector pipes.

Tighten: Tighten the pipes to 41 N.m (30 lb ft).

NOTE:

Ensure proper torquing of the fuel injector line. An under-
torqued fuel injector line will not seal properly and an over-
torqued fuel injector line may damage the fuel injector fitting.
An improperly sealed or damaged fuel injector line or fuel
injector fitting will cause a fuel leak.

2008 Chevrolet Silverado 1500

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