Hummer H3. Manual — part 546

Fig. 204: Locating Components Connectors At Rear Of Engine
Courtesy of GENERAL MOTORS CORP.

3. Connect the oil pressure sensor electrical connector (1).

4. Install the intake manifold. Refer to Intake Manifold Replacement.

OIL PUMP, SCREEN, AND CRANKSHAFT OIL DEFLECTOR REPLACEMENT

Removal Procedure

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 205: View Of Oil Pump, Screen & Components
Courtesy of GENERAL MOTORS CORP.

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

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

3. Remove the oil pump screen bolt and nuts.

4. Remove the oil pump screen with O-ring seal.

5. Remove the O-ring seal from the pump screen.

6. Discard the O-ring seal.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 206: View Of Crankshaft Oil Deflector & Nuts
Courtesy of GENERAL MOTORS CORP.

7. Remove the remaining crankshaft oil deflector nuts.

8. Remove the crankshaft oil deflector.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 207: Removing/Installing Oil Pump Bolts
Courtesy of GENERAL MOTORS CORP.

9. Remove the oil pump bolts.

10. Remove the oil pump.

11. Clean and inspect the oil pump. Refer to Oil Pump Cleaning and Inspection.

Installation Procedure

IMPORTANT: Do not allow dirt or debris to enter the oil pump assembly,

cap end as necessary.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3