Chevrolet Silverado / GMC Sierra. Service manual — part 479

Fig. 222: Removing Crankshaft Front Oil Seal Using J 44644
Courtesy of GENERAL MOTORS CORP.

1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.

2. Install J 44644 to the crankshaft front oil seal. See Special Tools . The jaws of the J 44644

fit into the inner sleeve. See Special Tools .

3. Using J 44644 , remove the crankshaft front oil seal. See Special Tools .

Installation Procedure

Fig. 223: Pressing Crankshaft Front Oil Seal On Using J 44645
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

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

1. Clean the front crankshaft seal bore and the crankshaft.

2. Lubricate the crankshaft sealing surface with clean engine oil.

3. Place the crankshaft front oil seal onto the crankshaft.

4. Install J 44645 to the crankshaft. See Special Tools .

5. Press the crankshaft front oil seal onto the crankshaft using J 44645 until the tool bottoms

out. See Special Tools .

6. Remove J 44645 . See Special Tools .

Fig. 224: Measuring Distance Between Crankshaft End & Oil Seal
Courtesy of GENERAL MOTORS CORP.

7. Measure the distance between the end of the crankshaft and the oil seal.

8. The service measurement is 43.45-44.05 mm (1.7106-1.7342 in).

2008 Chevrolet Silverado 1500

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

9. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement.

ENGINE FRONT COVER REPLACEMENT

Tools Required

J 37228 Seal Cutter. See Special Tools .

Removal Procedure

Fig. 225: View Of Crankshaft Position Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection

2008 Chevrolet Silverado 1500

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

and Connection (w/Single Battery) or Battery Negative Cable Disconnection and
Connection (w/Auxiliary Battery) or Battery Negative Cable Disconnection and
Connection (w/Dual Batteries) .

2. Remove the water pump. Refer to Water Pump Replacement (LMM) .

3. Remove the crankshaft front oil seal. Refer to Crankshaft Front Oil Seal Replacement.

4. Remove the right wheelhouse panel. Refer to Front Wheelhouse Liner Replacement -

Right Side (GMC) or Front Wheelhouse Liner Replacement - Right Side
(Chevrolet) .

5. Disconnect the crankshaft position (CKP) sensor electrical connector.

Fig. 226: View Of CKP Sensor & Bolt
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

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