Hummer H2. Manual - part 1397

Tighten: Tighten the bolt to 25 N.m (18 lb ft).

4. Install the engine protection shield.  

5. Install the engine shield bolts. 

Tighten: Tighten the bolts to 20 N.m (15 lb ft). 

Fig. 45: Oil Cooler Hoses 
Courtesy of GENERAL MOTORS CORP. 

6. Install the engine oil cooler hoses to the fan shroud.  

7. Install the engine oil cooler hoses to the radiator. Refer to Engine Oil Cooler Pipe/Hose Quick Connect 

Fitting .  

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

FAN REPLACEMENT 

Tools Required 

J 46406 Fan Clutch Remover and Installer. See Special Tools and Equipment . 

Removal Procedure 

Fig. 46: Installing J 46406 To Fan Clutch 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

1. Remove the fan shroud. Refer to Fan Shroud Replacement .  

2. Install J 46406 to the fan clutch. See Special Tools and Equipment . 

Fig. 47: View Of Fan Assembly 
Courtesy of GENERAL MOTORS CORP. 

3. Remove the fan hub nut from the water pump. 

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

Fig. 48: Fan Clutch & Fan Blade 
Courtesy of GENERAL MOTORS CORP. 

4. Remove the bolts from the fan clutch.  

5. Separate the fan clutch from the fan blade.  

Installation Procedure 

CAUTION: Do not use or attempt to repair a damaged cooling fan assembly. Replace 

damaged fans with new assemblies. An unbalanced cooling fan could fly 
apart causing personal injury and property damage.

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2