Jeep 1996 Grand Cherokee Service Manual page 222

ZJ
REMOVAL AND INSTALLATION (Continued)
Fig. 30 Clamp Number/Letter Location
(12) Remove the four pump mounting bolts (Fig.
31) and remove pump from vehicle. Discard old gas-
ket. Note that one of the four bolts is longer than the
other bolts.
Fig. 31 Water Pump Remove/Install—Typical
(13) If pump is to be replaced, the heater hose fit-
ting must be removed. Note position of fitting before
removal.
INSTALLATION
(1) If pump is being replaced, install the heater
hose fitting to the pump. Use a sealant on the fitting
such as Mopar Thread Sealant With Teflon. Refer
to the directions on the package.
(2) Clean the gasket mating surfaces. If the origi-
nal pump is used, remove any deposits or other for-
eign material. Inspect the cylinder block and water
pump mating surfaces for erosion or damage from
cavitation.
(3) Install the gasket and water pump. The sili-
cone bead on the gasket should be facing the water
pump. Also, the gasket is installed dry. Tighten
mounting bolts to 30 N·m (22 ft. lbs.) torque. Rotate
the shaft by hand to be sure it turns freely.
(4) Connect the radiator and heater hoses to the
water pump.
(5) Position water pump pulley to water pump
hub.
(6) If equipped with a water pump mounted fan,
install fan and four nuts to water pump hub. If not
equipped with a water pump mounted fan, install
four pump hub bolts. Tighten bolts (or nuts) to 27
N·m (20 ft. lbs.) torque.
(7) Install power steering pump.
CAUTION: When installing the serpentine engine
accessory drive belt, the belt MUST be routed cor-
rectly. If not, the engine may overheat due to the
water pump rotating in the wrong direction. Refer to
the Belt Removal and Installtion in this group for
appropriate belt routing. You may also refer to the
Belt Routing Label in the vehicle engine compart-
ment.
(8) Adjust accessory drive belt, refer to Accessory
Drive Belt removal and installation in this group.
(9) Fill cooling system with coolant and check for
leaks. Refer to Refilling Cooling System in this
group.
(10) Connect battery cable to battery.
(11) Start and warm the engine. Check for leaks.
WATER PUMP 5.2L ENGINE
The water pump on 5.2L engines is bolted directly
to the engine timing chain case/cover.
A gasket is used as a seal between the water pump
and timing chain case/cover.
If water pump is replaced because of bearing/shaft
damage, or leaking shaft seal, the mechanical cooling
fan assembly should also be inspected. Inspect for
fatigue cracks, loose blades, or loose rivets that could
have resulted from excessive vibration. Replace fan if
COOLING SYSTEM 7 - 29