Jeep 1997 Grand Cherokee Service Manual page 297

ZG
REMOVAL AND INSTALLATION (Continued)
Fig. 22 Thermal Viscous Fan Drive and Blade
Assembly
(8) Remove the drive belt by removing the auto-
matic belt tensioner. For procedures, refer to Belt
Removal/Installation in the Engine Accessory Drive
Belts section of this group.
WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAMP (Fig. 23).
GLASSES WHEN SERVICING CONSTANT TENSION
CLAMPS.
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 24). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.
(9) A metal coolant tube (used to connect rubber
coolant hoses), and its mounting bracket are attached
to the front of the water pump (Fig. 25). A rubber
hose connects this tube to the engine. Disconnect the
hose clamp and rubber hose at the back of the ther-
mostat. Position the hose to the side.
(10) Remove the 3 water pump pulley bolts (Fig.
21).
(11) Remove the water pump pulley from the
water pump.
ALWAYS WEAR SAFETY
Fig. 23 Hose Clamp Tool
Fig. 24 Clamp Number/Letter Location
(12) Disconnect the drain hose from the vent tube
at the bottom of water pump (Fig. 21).
(13) Remove the 4 water pump mounting bolts
(Fig. 21).
(14) Remove water pump from engine.
INSTALLATION
(1) Clean the o-ring mating surfaces. If the origi-
nal pump is to be reinstalled, remove any deposits or
other foreign material. Inspect the water pump,
water pump adapter and water pump mating sur-
faces for erosion or damage from cavitation.
(2) Position a new rubber o-ring seal (Fig. 21)
between the pump and pump adapter. Hold the seal
with petroleum jelly.
(3) Position the pump to the engine.
COOLING SYSTEM 7 - 23