Chevrolet Silverado / GMC Sierra. Service manual — part 590

12. Install the PCV cover screws.

Tighten: Tighten the PCV cover screws to 4 N.m (35 lb in).

INTAKE MANIFOLD CLEANING AND INSPECTION

Fig. 46: View Of Intake Manifold Crossover Inspection Areas
Courtesy of GENERAL MOTORS CORP.

1. Clean the intake manifold crossover.

2. Clean the intake manifold mating surfaces.

2008 Chevrolet Silverado 1500

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

Fig. 47: View Of Intake Manifold Inspection Areas
Courtesy of GENERAL MOTORS CORP.

3. Clean the intake manifolds.

4. Clean the intake manifold mating surfaces.

5. Inspect the intake manifolds for cracks.

6. Inspect the intake manifold mating surfaces for damage.

7. Replace the intake manifolds if any damage is found.

OIL FILTER ADAPTER AND OIL COOLER ASSEMBLY CLEANING AND INSPECTION

2008 Chevrolet Silverado 1500

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

Fig. 48: View Of Coolant Tube Inspection Areas
Courtesy of GENERAL MOTORS CORP.

1. Clean the coolant tube.

2. Inspect the coolant tube for cracks.

3. Inspect the coolant tube mating surfaces for damage.

2008 Chevrolet Silverado 1500

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

Fig. 49: View Of Oil Filter Adapter Inspection Areas
Courtesy of GENERAL MOTORS CORP.

4. Clean the oil filter adapter.

5. Inspect the oil filter adapter mating surfaces for damage.

6. Replace the O-rings.

2008 Chevrolet Silverado 1500

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