Chevrolet Silverado / GMC Sierra. Service manual — part 244

Installation Procedure

Fig. 32: View Of A/C Belt Tensioner
Courtesy of GENERAL MOTORS CORP.

1. Install the A/C belt tensioner.

2. Install the A/C belt tensioner bolts.

NOTE:

Refer to Fastener Notice .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Tighten: Tighten the A/C belt tensioner bolts to 50 N.m (37 lb ft).

3. Install the A/C drive belt. Refer to Air Conditioning Compressor Belt Replacement.

ENGINE MOUNT INSPECTION

1. Measure the engine movement at the engine mount in order to check 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.

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, check for loose engine mount bolts.

2. If the engine mount bolt torque is within specifications, check 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

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.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 33: Engine Mount-To-Frame Bracket Bolts (Left)
Courtesy of GENERAL MOTORS CORP.

1. Remove the engine mount-to-frame bracket bolts. (Right side shown, left side similar).

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

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 34: Engine Protection Shield
Courtesy of GENERAL MOTORS CORP.

3. Remove the engine shield bolts.

4. Remove the engine shield.

5. Raise and suitably support the engine using adjustable (screw type) jack stands.

IMPORTANT: DO NOT raise and/or support the engine by the crankshaft

balancer, or oil pan.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2