Chevrolet Silverado / GMC Sierra. Manual — part 481

1. If necessary, install a NEW pressure relief valve O-ring.

2. Lubricate the O-ring with engine oil.

Tighten: Tighten the valve to 39 N.m (29 lb ft).

Fig. 231: Determining Sealant Bead Dimensions
Courtesy of GENERAL MOTORS CORP.

3. Apply a 2-3 mm (1/8 in) wide by 0.5-1.5 mm (1/16 in) high, bead of sealant to the engine

front cover sealing surface to the engine block. Refer to Sealers, Adhesives, and
Lubricants for the correct part number.

4. Apply a 2-3 mm (1/8 in) wide by 0.5-1.5 mm (1/16 in) high, bead of sealant to the engine

front cover sealing surface to the upper oil pan. Refer to Sealers, Adhesives, and
Lubricants for the correct part number.

2008 Chevrolet Silverado 1500

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

Fig. 232: View Of Engine Front Cover
Courtesy of GENERAL MOTORS CORP.

5. Install the engine front cover.

6. Install the engine front cover bolts.

Tighten: Tighten the bolts to 25 N.m (18 lb ft).

2008 Chevrolet Silverado 1500

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

Fig. 233: View Of Upper Oil Pan To Engine Front Cover Bolts
Courtesy of GENERAL MOTORS CORP.

7. Install the upper oil pan to engine front cover bolts.

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

2008 Chevrolet Silverado 1500

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

Fig. 234: View Of CKP Sensor & Bolt
Courtesy of GENERAL MOTORS CORP.

8. Install a NEW O-ring to the CKP sensor spacer.

9. Lubricate the O-ring with clean engine oil.

10. Install the CKP sensor spacer and bolts.

Tighten: Tighten the bolts to 10 N.m (89 lb in).

IMPORTANT: The crankshaft position sensor spacers are machined with

different timing positions. However, if the crankshaft position
sensor spacer requires replacement, replace with a grade
"C" spacer.

2008 Chevrolet Silverado 1500

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