Chevrolet Silverado / GMC Sierra. Service manual — part 2181

Fig. 230: View Of Engine Block Rear Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.

1. Inspect the rear oil gallery plug for proper installation.

IMPORTANT:

Do not use the crankshaft rear oil seal or the engine rear
housing gasket again.

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

The special tools in this procedure are used to properly
align the engine rear housing at the oil pan surface and
to center the crankshaft rear oil seal.

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

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

The oil pan sealing surface at the rear housing, and
the engine block, MUST be aligned within
specifications.

An improperly aligned rear housing 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

Fig. 231: View of Rear Housing, Gasket and Seal
Courtesy of GENERAL MOTORS CORP.

2. Install the rear housing gasket (519), rear housing (518), and bolts (517).

3. Tighten the bolts finger tight. Do not overtighten.

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

Fig. 232: View Of J 41480 Installed To Engine Block
Courtesy of GENERAL MOTORS CORP.

NOTE:

Refer to Fastener Notice .

IMPORTANT: Start the J 41480 tool-to-rear housing bolts. See Special

Tools . Do not tighten the bolts at this time.

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

4. Install the J 41480 and bolts. See Special Tools .

Tighten: Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).

Fig. 233: View Of J 41480 & J 41476
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: To properly align the rear housing, the J 41476 must be

installed onto the rear of the crankshaft with the tool
mounting bolts parallel to the oil pan surface. See Special
Tools .

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