Chevrolet Silverado / GMC Sierra. Service manual — part 2004

Fig. 371: Installing Crankshaft Rear Oil Seal Using J 41479
Courtesy of GENERAL MOTORS CORP.

2. Install the J 41479 cone (2) and bolts onto the rear of the crankshaft. See Special Tools .

3. Tighten the bolts until snug. Do not overtighten.

4. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear seal bore.

Install the oil seal with the part number markings facing away from the engine.

5. Thread the J 41479 threaded rod into the tapered cone until the tool (1) contacts the oil

seal. See Special Tools .

6. Align the oil seal into the tool (1).

7. Rotate the handle of the tool (1) clockwise until the seal enters the rear cover and bottoms

into the cover bore.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

8. Remove the J 41479 . See Special Tools .

9. Install the automatic transmission flexplate, refer to Automatic Transmission Flex Plate

Replacement .

ENGINE REAR COVER REPLACEMENT

Tools Required

J 41476 Front and Rear Cover Alignment Tool. See Special Tools .

Removal Procedure

Fig. 372: View Of Oil Pan-To-Rear Cover Bolts
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

1. Remove the automatic transmission flexplate, refer to Automatic Transmission Flex Plate

Replacement .

2. Remove the oil pan-to-rear oil seal housing bolts (1).

Fig. 373: View of Rear Housing, Gasket and Seal
Courtesy of GENERAL MOTORS CORP.

3. Remove the rear oil seal housing bolts (517).

4. Remove the rear oil seal housing (518) and gasket (519). Discard the gasket.

5. Remove and discard the rear oil seal (141).

Installation Procedure

IMPORTANT:

Do not reuse the crankshaft oil seal or rear cover gasket.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Do not apply any type of sealant to the rear cover gasket,
unless specified.

The special tool in this procedure is used to properly center
the crankshaft rear oil seal.

The crankshaft rear oil seal will be installed after the rear
cover has been installed and aligned. Install the rear cover
without the crankshaft oil seal.

All gasket surfaces should be free of oil or other foreign
material during assembly.

The crankshaft rear oil seal MUST be centered in
relation to the crankshaft.

An improperly aligned rear cover may cause premature
rear oil seal wear and/or engine assembly oil leaks.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado