Hummer H3. Manual — part 342

7. Remove the oil pump pressure relief valve and the spring.

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

Installation Procedure

Fig. 220: Exploded View Of Oil Pump
Courtesy of GENERAL MOTORS CORP.

1. Install the oil pump pressure relief valve and the spring.

NOTE:

Refer to Component Fastener Tightening Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

2. Install the oil pump pressure relief valve plug.

Tighten: Tighten the plug to 14 N.m (124 lb in).

3. Install the oil pump outer and inner gears as removed.

4. Install the oil pump cover.

5. Install the oil pump cover bolts.

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

6. Install the engine front cover. Refer to Engine Front Cover Replacement.

CRANKSHAFT REAR OIL SEAL AND HOUSING REPLACEMENT

Tools Required

J 8092 Driver Handle

J 44215 Rear Seal Installer. See Special Tools.

Removal Procedure

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 221: View Of Crankshaft Rear Oil Seal Housing
Courtesy of GENERAL MOTORS CORP.

1. Remove the flywheel. Refer to Engine Flywheel Replacement (w/Automatic

Transmission).

2. Remove the 2 bolts securing the oil pan to the crankshaft rear oil seal housing.

3. Remove the crankshaft rear oil seal housing bolts.

4. Install 2 bolts into the threaded holes to act as jack screws and tighten evenly to separate the

crankshaft rear oil seal housing from the engine block and oil pan.

5. Remove the crankshaft rear oil seal housing.

6. Remove the 2 bolts from the jack screw holes.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 222: Identifying Crankshaft Rear Oil Seal
Courtesy of GENERAL MOTORS CORP.

7. Using a hammer and a punch, remove and discard the crankshaft rear oil seal.

8. Clean and inspect the crankshaft rear oil seal housing.

9. Clean and inspect the engine block and oil pan sealing surface.

Installation Procedure

IMPORTANT: Do not damage the seal bore.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3