Hummer H1 Service Manual page 197

4-14 Cooling System
Installation
1. If new pump is being installed, transfer hose adapter fit-
tings to new pump. Apply Loctite PST to fitting threads
beforehand.
2. Apply coat of Permatex no. 2, Ultra Black, or Ultra
Copper to each side of water pump gasket. Then position
gasket on pump.
3. Apply 1/8 - 3/16 in. (3.3-5 mm) wide bead of sealer to
backing plate (Figure 4-28). Encircle bolt hole at bottom
of plate with sealer as shown. Also apply sealer to threads
of bolt or stud used in this hole to avoid leaks.
4. Install adapter plate and water pump on front cover.
Tighten all studs and short bolts marked A to 13-20 lb-ft
Figure 4-26: Water Pump and Adapter Plate Removal/Installation
__________________________________________________________
ADAPTER PLATE
A
A
B
A
BYPASS ADAPTER
WATER PUMP
Figure 4-27: Water Pump
(18-27 N•m). Tighten large studs and large bolt marked B
to 25-37 lb-ft (34-50 N•m) (Figure 4-26).
5. Attach hoses to water pump.
6. Install fan and clutch.
7. Install and adjust serpentine drive belt.
8. Install radiator, shroud, coolers, and A/C condenser as
assembly.
9. Evacuate and recharge A/C system.
10. Refill engine cooling system.
11. Install hood.
12. Start engine, bleed air from cooling system, and top off
coolant level.
WATER PUMP
B
BACKING PLATE
GASKET
FRONT
COVER
®