Chevrolet Silverado / GMC Sierra. Manual - part 182
Stake in 3 locations 120 degrees apart.
Fig. 606: Front Of Engine Block Front Oil Gallery Plugs Or Balls
Courtesy of GENERAL MOTORS CORP.
2. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the outside
diameter of the NEW front engine oil gallery plugs.
3. Install the NEW front engine block oil gallery plugs.
A properly installed front engine oil gallery plug must be installed slightly below flush with
the front face of the engine block.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 607: Engine Block Core Hole Chamfer
Courtesy of GENERAL MOTORS CORP.
4. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the
outside diameter of the NEW engine block core hole plugs.
5. Install the NEW engine block core hole plugs.
A properly installed engine block core hole plug must be installed flush or below the bottom
of the chamfer (1) of the engine block core hole.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 608: Installing Crankshaft Rear Oil Seal Housing Locator Spring
Courtesy of GENERAL MOTORS CORP.
6. Install the crankshaft rear oil seal housing locator spring type S pin, if required.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 609: Installing Expansion Cup Plug Into Balance Shaft Rear Bearing Bole
Courtesy of GENERAL MOTORS CORP.
7. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the outside
diameter of the NEW expansion cup plug.
8. Install the NEW expansion cup plug into the balance shaft rear bearing hole.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado