Hummer H2. Manual — part 1412

Fig. 105: Installing Engine Coolant Heater In Place Of Drain Plug
Courtesy of GENERAL MOTORS CORP.

7. Install the coolant heater in place of the drain plug.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ENGINE Engine Cooling - Hummer H2

Tighten: Tighten the coolant heater to 50 N.m (37 lb ft).

Fig. 106: Engine Coolant Heater Cord Electrical Connector & Coolant Heater
Courtesy of GENERAL MOTORS CORP.

8. Push the engine coolant heater cord electrical connector (2) firmly into the coolant heater (1).

IMPORTANT: The engine coolant heater cord must not touch the engine, hot pipes,

manifold, or any moving parts. Always keep the electrical cord neatly
rolled up with the end of the cord tucked in the center of the coil and
secured in place.

2004 Hummer H2

2004 ENGINE Engine Cooling - Hummer H2

Fig. 107: Engine Coolant Heater Cord
Courtesy of GENERAL MOTORS CORP.

9. Place the cord into position.

10. Install the heater cord bolt and retainer.

Tighten: Tighten the heater cord bolt to 8 N.m (71 lb in).

NOTE:

The heater cord must not touch the engine, hot pipes, manifold, or any
moving parts. Route the cord to the left front of the engine compartment
securing with tie straps as necessary to prevent damage.

2004 Hummer H2

2004 ENGINE Engine Cooling - Hummer H2

Fig. 108: Oil Cooler Hose Bracket Bolt & Adapter Bolts
Courtesy of GENERAL MOTORS CORP.

11. Position the oil cooler hose adapter.

12. Install a NEW oil cooler hose adapter gasket.

13. Install the oil cooler hose adapter bolts (2).

Tighten: Tighten the oil cooler hose adapter bolts to 12 N.m (106 lb in).

14. Install the oil cooler hose bracket bolt (1).

Tighten: Tighten the oil cooler hose bracket bolt to 25 N.m (18 lb ft).

2004 Hummer H2

2004 ENGINE Engine Cooling - Hummer H2