Chevrolet Silverado / GMC Sierra. Service manual — part 490

18. Install the charged air cooler. Refer to Charge Air Cooler Replacement .

19. Install the valve lifters. Refer to Valve Lifter Replacement.

CRANKSHAFT REAR OIL SEAL REPLACEMENT

Tools Required

J 44641 Crankshaft Rear Oil Seal Remover. See Special Tools .

J 44642 Crankshaft Rear Oil Seal Installer. See Special Tools .

Removal Procedure

2008 Chevrolet Silverado 1500

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

Fig. 265: Removing Crankshaft Rear Oil Seal Using J 44641
Courtesy of GENERAL MOTORS CORP.

1. Remove the flywheel. Refer to Engine Flywheel Replacement.

2. Clean the area around the crankshaft rear oil seal.

3. Install J 44641 to the crankshaft rear oil seal. See Special Tools .

4. Remove the crankshaft rear oil seal using J 44641 . See Special Tools .

Installation Procedure

2008 Chevrolet Silverado 1500

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

Fig. 266: Pressing Crankshaft Rear Oil Seal In Using J 44642
Courtesy of GENERAL MOTORS CORP.

1. Ensure that the crankshaft is free of oil and dirt.

2. Clean the seal bore in the flywheel housing.

3. Position the crankshaft rear oil seal onto the crankshaft.

4. Install J 44642 to the crankshaft. See Special Tools .

5. Press the crankshaft rear oil seal into position using J 44642 , the tool will bottom out when

the seal reaches the proper depth. See Special Tools .

IMPORTANT: J 44642 must be fully secured to the crankshaft to ensure

proper seal depth. See Special Tools .

2008 Chevrolet Silverado 1500

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

6. Remove J 44642 . See Special Tools .

7. Install the flywheel. Refer to Engine Flywheel Replacement.

ENGINE FLYWHEEL HOUSING REPLACEMENT

Tools Required

J 37228 Seal Cutter. See Special Tools .

Removal Procedure

2008 Chevrolet Silverado 1500

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