Hummer H2. Manual - part 1707

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: 

z

Heat check cracks cover the rubber cushion surface.  

z

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

z

There is a split through the rubber cushion.  

ENGINE MOUNT REPLACEMENT - LEFT 

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.

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 34: 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 in General Information. 

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 35: Engine Shield Bolts (Left) 
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.

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 36: Engine Mount (Left) 
Courtesy of GENERAL MOTORS CORP. 

6. Remove the engine mount bolts.  

7. Remove the engine mount.  

Installation Procedure 

 

2004 Hummer H2 

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2