Hummer H3. Manual — part 318

Fig. 135: View Of Crankshaft Front Oil Seal
Courtesy of GENERAL MOTORS CORP.

2. Pry out the crankshaft front oil seal using a suitable tool.

Discard the seal.

Installation Procedure

Fig. 136: View Of Crankshaft Front Oil Seal

IMPORTANT: Do not damage the engine front cover or the crankshaft.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Courtesy of GENERAL MOTORS CORP.

1. Apply the engine oil to the outside diameter of the crankshaft front oil seal.

Fig. 137: Installing Crankshaft Front Oil Seal
Courtesy of GENERAL MOTORS CORP.

2. Use the J 45951 to install the NEW crankshaft front oil seal. See Special Tools.

3. Remove the J 45951 . See Special Tools.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

4. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement.

ENGINE FRONT COVER REPLACEMENT

Tools Required

J 44219 Cover Alignment Pins. See Special Tools.

Removal Procedure

1. Remove the water pump. Refer to Water Pump Replacement .

2. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.

3. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement.

4. Remove the power steering pump. Refer to Power Steering Pump Replacement (LLR) .

5. Remove the oil pump pipe and screen assembly. Refer to Oil Pump Suction Pipe and

Screen Assembly Replacement.

6. Lower the vehicle.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 138: View Of 7 mm Center Bolt
Courtesy of GENERAL MOTORS CORP.

7. Remove the 7 mm center bolt (1).

8. Remove the remaining engine front cover bolts.

9. Install 2 bolts into any of the threaded holes to act as jack screws and tighten evenly in order

to separate the engine front cover from the engine block.

10. Remove the engine front cover.

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

12. Remove the oil pump if necessary. Refer to Oil Pump Replacement.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3