Chevrolet Silverado / GMC Sierra. Service manual — part 1798

cooler pipe lower bolt (1) at the oil cooler.

7. Reposition the EGR cooler pipe (2) out of the way.

Fig. 21: View Of Exhaust Pipe To Exhaust Manifold Bolts
Courtesy of GENERAL MOTORS CORP.

8. Remove the exhaust pipe to exhaust manifold bolts (1).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 22: View Of Exhaust Manifold Heat Shield & Bolts
Courtesy of GENERAL MOTORS CORP.

9. Remove the exhaust manifold heat shield bolts (1) and shield (2).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 23: Left Exhaust Manifold Bolts & Nuts Removal & Installation Sequence
Courtesy of GENERAL MOTORS CORP.

10. Remove the exhaust manifold bolts and nuts in the sequence shown.

11. Remove the exhaust manifold and gasket. Discard the gasket.

Installation Procedure

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 24: Exhaust Manifold Bolt Tightening Sequence -- Left Side
Courtesy of GENERAL MOTORS CORP.

1. Install the a NEW exhaust manifold gasket onto the manifold studs.

2. Position a NEW exhaust pipe gasket between the exhaust manifold and exhaust pipe. Align

the tab on the gasket to face outward.

3. Install the exhaust manifold onto the studs.

4. Install and tighten the exhaust manifold bolts and nuts in the sequence shown.

Tighten:

Tighten the bolts/nuts to 57 N.m (42 lb ft).

Tighten the 4 center bolts/nuts an additional pass to 57 N.m (42 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado