Hummer H3. Manual — part 386

Removal Procedure

Fig. 389: View Of Flywheel Locator
Courtesy of GENERAL MOTORS CORP.

1. Install J 45849 into the flywheel locator. See Special Tools.

2. Remove the flywheel locator from the crankshaft.

3. Remove J 45849 . See Special Tools.

BALANCE SHAFT BEARING REMOVAL

Tools Required

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

J 44225 Balance Shaft Bearing Remover/Installer

Removal Procedure

Fig. 390: View Of Balance Shaft Journals
Courtesy of GENERAL MOTORS CORP.

1. Position the cylinder block so the cylinder head deck face is down and identify the

following:

The left balance shaft bearings are in the shorter length balance shaft journal (3) and
(4).

The right balance shaft - outer diameter is grooved, bearings are in the longer length

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

balance shaft journal (1) and (2).

Fig. 391: Identifying Front & Rear Bearings
Courtesy of GENERAL MOTORS CORP.

2. Identify the following:

Bearings (2) and (3) are the front bearings and bearings (1) and (4) are the rear
bearings.

The rear bearings (1) and (4) have a slightly larger diameter than the front bearings (2)
and (3). This allows for easier removal and installation of the front bearings. The rear
bearings also have notches on them.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 392: Installing 44225 Into Right Balance Shaft Bearing Bore
Courtesy of GENERAL MOTORS CORP.

3. Install J 44225 into the right balance shaft bearing bore.

4. Position the swivel end inside lip of J 44225 against the frontside of the rear bearing.

5. Turn the nut clockwise to remove the bearing.

IMPORTANT: It may help to stand the block on end to aid in positioning the

swivel end of J 44225 .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3