Hummer H3. Manual — part 347

CRANKSHAFT REAR OIL SEAL REPLACEMENT

Tools Required

J 8092 Driver Handle

J 44215 Rear Seal Installer. See Special Tools.

Removal Procedure

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

Transmission).

Fig. 239: Identifying Crankshaft Rear Oil Seal
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Do not damage the crankshaft or seal bore.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

2. Using a suitable tool, pry the crankshaft rear oil seal out from the crankshaft rear oil seal

housing. Discard the seal.

Installation Procedure

1. Lightly lubricate the crankshaft rear oil seal lip with clean engine oil.

2. Position the plastic installation sleeve supplied with the NEW seal to the crankshaft.

Fig. 240: Installing Crankshaft Rear Oil Seal
Courtesy of GENERAL MOTORS CORP.

3. Using the J 44215 with the J 8092 and a hammer, install the crankshaft rear oil seal into the

crankshaft rear oil seal housing. See Special Tools.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

The spring side of the seal goes toward the engine.

Ensure the seal is installed square.

The seal will bottom out in the housing when fully installed.

4. Install the flywheel. Refer to Engine Flywheel Replacement (w/Automatic

Transmission).

ENGINE FLYWHEEL REPLACEMENT (W/AUTOMATIC TRANSMISSION)

Tools Required

J 45059 Angle Meter. See Special Tools.

Removal Procedure

1. Remove the transmission. Refer to Transmission Replacement .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 241: View Of Engine Flywheel
Courtesy of GENERAL MOTORS CORP.

2. Remove and discard the flywheel bolts.

3. Remove the flywheel.

4. Clean and inspect the flywheel. Refer to Engine Flywheel Cleaning and Inspection

(Automatic Transmission) or Engine Flywheel Cleaning and Inspection (Manual
Transmission).

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3