Hummer H2. Manual - part 1402

Fig. 65: Coolant Air Bleed Hose & Pipe 
Courtesy of GENERAL MOTORS CORP. 

1. Install the coolant air bleed hose (1) onto the pipe (2). 

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

Fig. 66: Pipe & Cover Gasket 
Courtesy of GENERAL MOTORS CORP. 

2. Install the gaskets onto the coolant air bleed pipe and covers. 

IMPORTANT: Install the gaskets properly onto the pipe and covers. Position the O-ring 

seal onto the nipple portion of the pipe.

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

Fig. 67: Coolant Air Bleed Pipe & Gaskets 
Courtesy of GENERAL MOTORS CORP. 

3. Install the coolant air bleed pipe (2) and gaskets (3) onto the cylinder heads.  

4. Install the coolant air bleed pipe bolts (1). 

Tighten: Tighten the coolant air bleed pipe bolts to 12 N.m (106 lb in). 

5. Install the generator. Refer to Generator Replacement in Engine Electrical.  

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

COOLANT AIR BLEED HOSE REPLACEMENT 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

Removal Procedure 

1. Drain the cooling system. Refer to Draining and Filling Cooling System . 

Fig. 68: Coolant Air Bleed Hose 
Courtesy of GENERAL MOTORS CORP. 

2. Remove the engine sight shield. Refer to Engine Sight Shield Replacement (6.0L (LQ4) in Engine 

Mechanical - 4.8L, 5.3L and 6.0L.  

3. Remove the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct 

Replacement in Engine Controls - 4.8L, 5.3L and 6.0L.  

4. Reposition the coolant air bleed hose clamp at the throttle body.  

5. Remove the coolant air bleed hose from the throttle body. 

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2