Jeep Grand Cherokee WK. Manual — part 202
CAUTION: The cooling system normally operates at 97-124 kPa (14-18 psi) pressure. Exceeding this pres-
sure may damage the radiator or hoses.
Allow the radiator to fill with water. When radiator is filled, apply air in short blasts allowing radiator to refill between
blasts. Continue this reverse flushing until clean water flows out through rear of radiator cooling tube passages. For
more information, refer to operating instructions supplied with flushing equipment. Have radiator cleaned more
extensively by a radiator repair shop.
REVERSE FLUSHING ENGINE
Drain the cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE). Remove the thermostat housing
and thermostat. Install the thermostat housing. Disconnect the radiator upper hose from the radiator and attach the
flushing gun to the hose. Disconnect the radiator lower hose from the water pump. Attach a lead away hose to the
water pump inlet fitting.
CAUTION: Be sure that the heater control valve is closed (heat off). This is done to prevent coolant flow
with scale and other deposits from entering the heater core.
Connect the water supply hose and air supply hose to the flushing gun. Allow the engine to fill with water. When the
engine is filled, apply air in short blasts, allowing the system to fill between air blasts. Continue until clean water
flows through the lead away hose. For more information, refer to operating instructions supplied with flushing equip-
ment.
Remove the lead away hose, flushing gun, water supply hose and air supply hose. Remove the thermostat housing
(Refer to 7 - COOLING/ENGINE/ENGINE COOLANT THERMOSTAT - REMOVAL). Install the thermostat and hous-
ing with a replacement gasket (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT THERMOSTAT - INSTALLA-
TION). Connect the radiator hoses. Refill the cooling system with the correct antifreeze/water mixture (Refer to 7 -
COOLING - STANDARD PROCEDURE).
7 - 14
COOLING
WK
SPECIFICATIONS
TORQUE
DESCRIPTION
N·m
Ft. Lbs.
In. Lbs.
Automatic Belt Tensioner to Mounting Bracket Bolt
3.7L
4.7L
41
30
-
5.7L
3.0L DIESEL
Automatic Belt Tensioner Pulley Bolt
3.7L
4.7L
61
45
-
5.7L
3.0L DIESEL
Block Heater Bolt
3.7L
4.7L
2
-
17
5.7L
2.7L DIESEL
Fan Blade Assembly to Viscous Drive Bolts
4.7L
23
—
200
Generator Mounting Bolts 4.7L
57
42
—
Radiator Upper Isolator to Crossmember Nuts
3
—
20
Radiator Upper Isolator to Radiator Nuts
4
—
36
Radiator Brace Bolts
10
—
90
Thermostat Housing Bolts
3.7L
22
16
—
4.7L
13
—
115
5.7L
3.0L DIESEL
Upper Radiator Crossmember to Body Bolts
10
—
90
Water Pump Bolts
3.7L
23
17
—
4.7L
58
43
—
5.7L
3.0L DIESEL
WK
COOLING
7 - 15
DESCRIPTION
N·m
Ft. Lbs.
In. Lbs.
Water Pump Pulley to Water Pump Bolts
3.7L
28
—
250
4.7L
5.7L
3.0L DIESEL
High Pressure Inlet Hose to Hydraulic Fan Drive (1/2 inch Fitting)
49
36
—
High Pressure Outlet Hose to Steering Gear (3/8 inch Fitting)
29
21.5
—
Fan Shroud to Radiator Mounting Bolts
6
—
50
FILL VOLUMES
SPECIFICATIONS
DESCRIPTION
SPECIFICATION
Metric
Standard
3.7L
9 L
10.0 qts.
4.7L
13.7 L
14.5 qts.
5.7L
13.7 L
14.5 qts.
3.0L DIESEL
7 - 16
COOLING
WK
SPECIAL TOOLS
COOLING
Pliers 6094
RELEASE TOOL 8875A
PRESSURE TESTER 7700;A
Coolant Refractometer 8286
WK
COOLING
7 - 17
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