Hummer H3. Manual — part 291

3. Remove the left front wheelhouse liner. Refer to Wheelhouse Panel Replacement (Front)

or Wheelhouse Panel Replacement (Rear) .

4. Drain the engine cooling system. Refer to Cooling System Draining and Filling (Static

Fill) or Cooling System Draining and Filling (Vac-N-Fill) .

5. Remove the radiator outlet hose. Refer to Radiator Outlet Hose Replacement (LLR) .

6. Remove the drive belt idler pulley bolts.

7. Remove drive belt idler pulley.

Installation Procedure

Fig. 40: View Of Drive Belt Idler Pulley & Bolts
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

1. Position drive belt idler pulley to the engine.

2. Install the drive belt idler pulley bolts.

Tighten: Tighten the bolts in sequence to 50 N.m (37 lb ft).

3. Install the radiator outlet hose. Refer to Radiator Outlet Hose Replacement (LLR) .

4. Install the left front wheelhouse liner. Refer to Wheelhouse Panel Replacement (Front)

or Wheelhouse Panel Replacement (Rear) .

5. Install the left front wheel. Refer to Tire and Wheel Removal and Installation .

6. Fill the engine cooling system. Refer to Cooling System Draining and Filling (Static

Fill) or Cooling System Draining and Filling (Vac-N-Fill) .

7. Install the drive belt. Refer to Drive Belt Replacement (Without A/C) or Drive Belt

Replacement (With A/C).

ENGINE MOUNT INSPECTION

1. Measure the engine movement at the engine mount in order to inspect for damage to the

rubber portions of the mount.

1. Apply the park brake.

2. Start the engine.

3. Firmly apply and hold the primary brakes.

4. Have an assistant stand to the side of the vehicle in order to observe for engine

movement.

NOTE:

Refer to Fastener Notice .

NOTE:

Broken or deteriorated mounts can cause misalignment and
destruction of certain drive train components. When a single mount
breaks, the remaining mounts are subjected to abnormally high
stresses.

NOTE:

When raising or supporting the engine for any reason, do not use a
jack under the oil pan, any sheet metal or the crankshaft pulley. Due
to the small clearance between the oil pan and the oil pump screen,
jacking against the oil pan may cause the pan to be bent against the
pump screen. This will result in a damaged oil pickup unit.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

5. Slightly load the engine shifting from drive to reverse a few times.

6. If the engine moves more than 24 mm (0.945 in) from the at rest position, in either

direction, inspect for loose engine mount bolts.

2. If the engine mount bolt torque is within specifications, inspect the condition of the engine

mount.

3. Replace the engine mount if any of the following conditions exist:

Heat check cracks cover the rubber cushion surface.

The rubber cushion is separated from the metal plate of the mount.

There is a split through the rubber cushion.

ENGINE MOUNT REPLACEMENT - LEFT SIDE

Removal Procedure

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the left front wheel and tire assembly. Refer to Tire and Wheel Removal and

Installation .

3. Remove the engine shield, if equipped. Refer to Engine Shield Replacement .

4. Remove the lower intermediate steering shaft. Refer to Lower Intermediate Steering

Shaft Replacement .

5. Support the engine using a jack stand and a block of wood.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 41: Locating Left Engine Mount-To-Frame Bracket Through Bolt
Courtesy of GENERAL MOTORS CORP.

6. Remove the left engine mount-to-frame bracket through bolt.

7. Loosen the right side through bolt.

8. Raise the engine using the jack stand; the engine will tilt to one side.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3