Hummer H3. Manual — part 341

Fig. 216: View Of Oil Pressure Switch Engine Wiring Harness Electrical Connector
Courtesy of GENERAL MOTORS CORP.

2. Connect the oil pressure switch electrical connector (1).

3. Install the engine shield. Refer to Engine Shield Replacement .

OIL PUMP SUCTION PIPE AND SCREEN ASSEMBLY REPLACEMENT

Removal Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 217: Identifying Oil Pump Pipe and Screen Assembly
Courtesy of GENERAL MOTORS CORP.

1. Remove the oil pan. Refer to Oil Pan Replacement.

2. Remove the oil pump pipe screen brace bolts.

3. Remove the oil pump pipe screen bolt.

4. Remove the oil pump pipe screen from the engine.

5. Remove and discard the oil pump pipe seal.

6. Clean and inspect the oil pump pipe screen.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 218: Identifying Oil Pump Pipe and Screen Assembly
Courtesy of GENERAL MOTORS CORP.

1. Install a NEW oil pump pipe seal onto the oil pump pipe screen assembly.

2. Install the oil pump pipe screen to the engine.

3. Apply sealant to the oil pump pipe bolt threads. Refer to Sealers, Adhesives and

Lubricants.

4. Install the oil pump pipe screen assembly bolts.

Tighten: Tighten the bolts to 10 N.m (89 lb in).

5. Install the oil pan. Refer to Oil Pan Replacement.

OIL PUMP REPLACEMENT

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Removal Procedure

1. Remove the engine front cover. Refer to Engine Front Cover Replacement.

Fig. 219: Exploded View Of Oil Pump
Courtesy of GENERAL MOTORS CORP.

2. Remove the oil pump cover bolts.

3. Remove the oil pump cover.

4. Mark the inner and the outer gears in relation to the oil pump housing.

5. Remove the inner and the outer oil pump gears.

6. Remove the oil pump pressure relief valve plug.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3