Hummer H1 Service Manual page 193

4-10 Cooling System
RADIATOR LOWER TUBE ASSEMBLY REPLACEMENT
Removal
1. Drain cooling system.
2. Remove drain valve from lower tube assembly
(Figure 4-17).
3. Disconnect radiator lower tube assembly from frame
bracket.
4. Loosen clamp and disconnect water pump inlet hose from
lower tube assembly.
5. Loosen clamp and disconnect surge tank-to-lower radiator
hose from lower tube assembly.
6. Loosen clamp and disconnect lower radiator hose from
lower tube assembly.
7. Remove lower tube assembly.
FRAME BRACKET
LOWER
RADIATOR HOSE
__________________________________________________________
Figure 4-17: Radiator Lower Tube Assembly Location
Installation
1. Secure lower tube assembly to frame bracket with bolts,
washers, and locknuts. Tighten locknuts to 6 lb-ft (8 N•m)
(Figure 4-17).
2. Connect lower radiator hose to lower tube assembly and
tighten clamp.
3. Connect surge tank-to-lower radiator hose to lower tube
assembly and tighten clamp.
4. Connect water pump inlet hose to lower tube assembly
and tighten clamp.
5. Apply sealant tape to threads of drain valve and screw
drain valve into lower tube assembly.
6. Fill cooling system.
DRAIN VALVE
WATER PUMP
INLET HOSE
SURGE TANK-TO-
LOWER RADIATOR
HOSE
LOWER TUBE
ASSEMBLY
®