2003 JEEP GRAND CHEROKEE Coolant and radiator

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Page 250 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (1) Position sensor into the coolant recovery pres-
sure container (Fig. 1).
(2) Connect the coolant level sensor electrical con-
nector (Fig. 2).
(3) Close hood.
COOLANT RECOVERY PRESS
CONTAINER
DESC

Page 251 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual ²Fan control valve
²Two stage G-rotor hydraulic drive
The hydraulic fan and drive is not serviceable.
Therefore any failure of the fan blade, hydraulic fan
drive or fan shroud requires replacement o

Page 255 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (7) After removing fan blade/viscous fan drive
assembly,do notplace viscous fan drive in horizon-
tal position. If stored horizontally, silicone fluid in
the viscous fan drive could drain into its bea

Page 256 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual An optional engine block heater (Fig. 13) is avail-
able with all models. The heater is equipped with a
power cord. The cord is attached to an engine com-
partment component with tie-straps. The heate

Page 257 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (3) Raise vehicle.
(4) Remove engine cylinder block drain plug(s)
located on the sides of cylinder block above the oil
pan rail (Fig. 16).
(5) Remove power cord from block heater.(6) Loosen screw at c

Page 258 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (2) Insert block heater assembly with element loop
pointing at twelve oclock (Fig. 19).
(3) With block heater fully seated, tighten center
screw to 2 N´m (17 in. lbs.) torque.
(4) Refill cooling sys

Page 259 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (2) Disconnect electrical connector from ECT sen-
sor (Fig. 20).
(3) Remove sensor from thermostat housing.
REMOVALÐ4.7L ENGINE
WARNING: HOT, PRESSURIZED COOLANT CAN
CAUSE INJURY BY SCALDING. COOLING

Page 260 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual The same thermostat is used for winter and sum-
mer seasons. An engine should not be operated with-
out a thermostat, except for servicing or testing.
Operating without a thermostat causes other prob-
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