Hummer H1 Service Manual page 191

4-8 Cooling System
3. Connect surge tank-to-lower radiator hose to surge tank.
4. Connect radiator vent hose to surge tank.
5. Connect overflow hose to surge tank.
6. Fill and purge cooling system.
SURGE TANK
BRACKET
LOW COOLANT
SENSOR
VENT HOSE FITTING
(HOSE NOT SHOWN)
Figure 4-12: Surge Tank Replacement
SURGE TANK-TO-RADIATOR VENT HOSE
REPLACEMENT
Removal
1. Depressurize cooling system.
2. Loosen two clamps and remove radiator vent hose from
radiator and surge tank (Figure 4-13).
3. Reclaim coolant.
Installation
1. Secure radiator vent hose to surge tank and radiator with
two clamps (Figure 4-13).
2. Tighten coolant filler cap.
3. Replace coolant.
____________________________________________________________
OVERFLOW
HOSE
SURGE TANK-TO-LOWER
RADIATOR HOSE
SURGE TANK
Figure 4-13: Surge Tank-to-Radiator Vent Hose
THERMOSTAT BYPASS HOSE REPLACEMENT
Removal
1. Drain cooling system.
2. Loosen two clamps and remove bypass hose from nipples
on water pump and water crossover (Figure 4-14).
Installation
1. Secure bypass hose to nipples on water pump and water
crossover with two clamps (Figure 4-14).
2. Fill cooling system.
NIPPLES
Figure 4-14: Thermostat Bypass Hose
Replacement
VENT HOSE
RADIATOR
Location
BLEEDER VALVE
WATER CROSSOVER
BYPASS
HOSE
WATER PUMP
®