Hummer H3. Manual — part 1109

Fig. 30: View Of Thermostat Housing
Courtesy of GENERAL MOTORS CORP.

5. Remove the thermostat housing bolts.

6. Remove the thermostat housing from the engine block.

7. Clean and inspect the thermostat housing.

8. Clean and inspect the sealing surface of the engine block.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

Fig. 31: View Of Thermostat Housing
Courtesy of GENERAL MOTORS CORP.

1. Position the thermostat housing to the engine block.

2. Install the thermostat housing bolts.

Tighten: Tighten the bolts to 10 N.m (89 lb in).

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

Fig. 32: View Of Radiator Inlet Hose & Thermostat Housing
Courtesy of GENERAL MOTORS CORP.

3. Position the J 38185 to the clamp (3) in order to connect the radiator inlet hose (2) to the

thermostat housing (4). See Special Tools.

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

Wheelhouse Panel Replacement (Rear) .

5. Lower the vehicle.

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

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

7. Inspect all sealing surfaces for leaks after starting the engine.

2007 Hummer H3

2007 ENGINE Engine Cooling - H3

WATER OUTLET HOUSING REPLACEMENT (WITH LLR)

Tools Required

J 38185 Hose Clamp Pliers. See Special Tools.

Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or

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

Fig. 33: Locating Radiator Outlet Hose To Water Outlet Housing Clamp
Courtesy of GENERAL MOTORS CORP.

2. Position the J 38185 to the clamp (8) in order to remove the radiator outlet hose (7) from

2007 Hummer H3

2007 ENGINE Engine Cooling - H3