Jeep 1997 Grand Cherokee Service Manual page 256

MOUNTING BOLT WATER PUMP FAN BLADE O-RING
TURN CLOCKWISE TO REMOVE
7 - 28 COOLING SYSTEM
REMOVAL AND INSTALLATION (Continued)
Fig. 34 Belt Tensioner Assembly—5.2/5.9LEngines
(11) Remove lower radiator hose clamp and remove
lower hose at water pump.
(12) Remove heater hose clamp (Fig. 35) and
heater hose from heater hose coolant return tube.
(13) Loosen heater hose coolant return tube
mounting bolt and nut (Fig. 35) and remove tube
from water pump. Discard the old tube o-ring.
Fig. 35 Coolant Return Tube—5.2/5.9LEngines
(14) Remove seven water pump mounting bolts
(Fig. 36).
COOLANT RETURN TUBE IDLER PULLEY MOUNTING NUT HEATER HOSE TENSIONER
BELT
WATER PUMP MOUNT- ING BOLTS
Fig. 36 Water Pump Bolts—5.2/5.9L Engines—
(15) Loosen clamp at water pump end of bypass
hose (Fig. 32). Slip bypass hose from water pump
while removing pump from vehicle. Discard old gas-
ket.
CAUTION: Do not pry water pump at timing chain
case/cover. The machined surfaces may be dam-
aged resulting in leaks.
INSTALLATION
(1) Clean gasket mating surfaces.
(2) Using a new gasket, install water pump to
engine as follows: Guide water pump nipple into
bypass hose as pump is being installed. Install water
pump bolts (Fig. 36). Tighten water pump mounting
bolts to 40 N·m (30 ft. lbs.) torque.
(3) Position bypass hose clamp to bypass hose.
(4) Spin water pump to be sure that pump impel-
ler does not rub against timing chain case/cover.
(5) Install a new o-ring to the heater hose coolant
return tube (Fig. 35). Coat the new o-ring with anti-
freeze before installation.
(6) Install coolant return tube to engine (Fig. 35).
Be sure the slot in tube bracket is bottomed to the
mounting bolt. This will properly position return
tube.
(7) Connect radiator lower hose to water pump.
(8) Connect heater hose and hose clamp to coolant
return tube.
(9) Install water pump pulley. Tighten bolts to 27
N·m (20 ft. lbs.) torque. Place a bar or screwdriver
between water pump pulley bolts (Fig. 32) to prevent
pulley from rotating.
(10) Relax tension from belt tensioner (Fig. 34).
Install drive belt.
Typical
ZG