Hummer H2. Manual — part 1868

1. Install the oil pan baffle and bolts, if previously removed.

Tighten: Tighten the oil pan baffle bolts to 12 N.m (106 lb in).

Fig. 629: Sealant On Engine Front Cover Gasket Tabs
Courtesy of GENERAL MOTORS CORP.

plane.

z

Do not use the oil pan gasket again.

z

It is not necessary to rivet the NEW gasket to the oil pan.

z

It is not necessary to remove the oil level sensor prior to oil pan
installation.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

2. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent 20 mm (0.8 in) long to the engine

block. Apply the sealant directly onto the tabs of the front cover gasket that protrude into the oil pan
surface. Refer to

Sealers, Adhesives, and Lubricants

.

Fig. 630: Sealant On Engine Rear Cover Gasket Tabs
Courtesy of GENERAL MOTORS CORP.

3. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent 20 mm (0.8 in) long to the engine

block. Apply the sealant directly onto the tabs of the rear cover gasket that protrude into the oil pan
surface.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 631: View Of Oil Pan
Courtesy of GENERAL MOTORS CORP.

4. Pre-assemble the oil pan gasket to the pan.

IMPORTANT: Be sure to align the oil gallery passages in the oil pan and engine block

properly with the oil pan gasket.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

1. Install the gasket onto the oil pan.

2. Install the oil pan bolts to the pan and through the gasket.

5. Install the oil pan, gasket and bolts to the engine block.

6. Tighten bolts finger tight. Do not overtighten.

7. Place a straight edge across the rear of the engine block and the rear of the oil pan at the transmission

housing mounting surfaces.

Fig. 632: Aligning Oil Pan
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2