Jeep Grand Cherokee WJ. Manual - part 68

(5) Remove the mounting bolts form the shroud

(Fig. 41).

(6) Remove the radiator core support.
(7) Remove the radiator mounting bolts.
(8) Gently pull radiator toward front of vehicle to

provide clearance to remove fan shroud.

(9) Remove the shroud and fan from vehicle.

INSTALLATION

NOTE: The fan can not be installed seperate from
the shroud. Both fan and shroud must be installed
together.

(1) Carefully position the viscous fan into the

shroud, then position the shroud and fan into the
vehicle.

(2) Install radiator mounting bolts.
(3) Reconnect transmission oil cooler line to retain-

ing clip (Fig. 40A).

(4) Install radiator core support.

NOTE: The lower left side mounting bolt can only
be accessed from under vehicle.

(5) Install the mounting bolts into the shroud
(6) Attach the electrical connector onto the shroud,

then connect the connector to the electric fan connector.

(7) Install the viscous fan onto the water pump.

Using special tool 6958 Spanner Wrench and 8346
Adapters, tighten the viscous fan onto the water
pump (Fig. 40).

RADIATOR

REMOVAL

WARNING: DO

NOT

REMOVE

THE

CYLINDER

BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAINCOCK WITH THE SYSTEM HOT AND UNDER
PRESSURE. SERIOUS BURNS FROM COOLANT
CAN OCCUR. REFER TO COOLING SYSTEM DRAIN-
ING IN THIS GROUP.

Do not waste reusable coolant. If the solution is

clean, drain the coolant into a clean container for reuse.

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, SUCH AS SPECIAL CLAMP TOOL (NUMBER
6094) (Fig. 42). SNAP-ON CLAMP TOOL (NUMBER
HPC-20) MAY BE USED FOR LARGER CLAMPS.
ALWAYS WEAR SAFETY GLASSES WHEN SERVIC-
ING CONSTANT TENSION CLAMPS.

CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 43). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.

CAUTION: When removing the radiator or A/C con-
denser for any reason, note the location of all radi-
ator-to-body and radiator-to-A/C condenser rubber
air seals (Fig. 44). These are used at the top, bot-
tom and sides of the radiator and A/C condenser.
To

prevent

overheating,

these

seals

must

installed to their original positions.

(1) Disconnect the negative battery cable at bat-

tery.

Fig. 40A Transmission Oil Cooler Line Retaining

Clip and Electric Fan Electrical Connector

1 – TRANSMISSION OIL COOLER LINE
2 – CLIP
3 – TRANSMISSION OIL COOLER LINE
4 – ELECTRIC FAN ELECTRICAL CONNECTOR
5 – FAN SHROUD

Fig. 41 Fan Shroud and Electric Fan 4.7L Engine

1 – RADIATOR
2 – ELECTRIC COOLING FAN CONNECTOR
3 – FAN SHROUD
4 – ELECTRIC COOLING FAN

7 - 34

COOLING SYSTEM

REMOVAL AND INSTALLATION (Continued)

2000 WJ Service Manual
Publication No. 81-370-0047
TSB 26-03-00

March, 2000

WARNING: DO

NOT

REMOVE

THE

CYLINDER

BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAINCOCK WITH THE SYSTEM HOT AND UNDER
PRESSURE. SERIOUS BURNS FROM COOLANT
CAN OCCUR. REFER TO COOLING SYSTEM DRAIN-
ING IN THIS GROUP.

Do not waste reusable coolant. If the solution is

clean, drain the coolant into a clean container for
reuse.

CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 43). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.

(2) Drain coolant from radiator. Refer to Draining

Cooling System in this section.

NOTE: The 4.0L engine does not require special
tool 6958 spanner wrench or 8346 adapters to
remove the fan drive from the water pump.

(3)

The thermal viscous fan drive is attached

(threaded) to the water pump hub shaft. Remove fan/
viscous fan drive assembly from water pump by turn-
ing mounting nut counterclockwise as viewed from
front. Threads on viscous fan drive are RIGHT
HAND. Using spanner wrench 6958 with adapters
8346 (4.7L engines only) and a 36 MM Fan Wrench
(Fig. 45) loosen the fan drive/ fan blade. Drive belt
removal is not necessary for removal of fan drive.

Fig. 42 Hose Clamp Tool—Typical

1 – HOSE CLAMP TOOL 6094
2 – HOSE CLAMP

Fig. 43 Clamp Number/Letter Location—Typical

1 – TYPICAL CONSTANT TENSION HOSE CLAMP
2 – CLAMP NUMBER/LETTER LOCATION
3 – TYPICAL HOSE

Fig. 44 Air Seals—Typical

1 – AIR DAM
2 – RADIATOR
3 – AIR DAM
4 – A/C CONDENSER
5 – AIR SEAL

COOLING SYSTEM

7 - 35

REMOVAL AND INSTALLATION (Continued)

(4) Do not attempt to remove fan/viscous fan drive

assembly from vehicle at this time.

(5) Remove the front grill. Refer to Group 23 for

procedure.

(6) Remove two radiator mounting bolts (Fig. 48)

(Fig. 47).

(7) Disconnect both transmission cooler lines from

radiator.

(8) Disconnect electric fan connector, then discon-

nect connector harness from shroud (all 4.7L engines
and heavy cooling package 4.0L only) (Fig. 48) (Fig.
47).

(9) Disconnect the radiator upper and lower hoses

(Fig. 48) (Fig. 47).

(10) Disconnect the overflow hose from radiator

(Fig. 48) (Fig. 47).

(11) Remove the air inlet duct at the grill.
(12) The lower part of radiator is equipped with

two alignment dowel pins (Fig. 46). They are located
on the bottom of radiator tank and fit into rubber
grommets. These rubber grommets are pressed into
the radiator lower crossmember.

WARNING: THE AIR CONDITIONING SYSTEM (IF
EQUIPPED) IS UNDER A CONSTANT PRESSURE
EVEN WITH THE ENGINE OFF. REFER TO REFRIG-
ERANT WARNINGS IN GROUP 24, HEATING AND
AIR CONDITIONING BEFORE HANDLING ANY AIR
CONDITIONING COMPONENT.

(13) If equipped with an auxiliary automatic trans-

mission oil cooler, use caution when removing radia-
tor. The oil cooler lines are routed through a rubber
air seal on the right side of radiator. Do not cut or
tear this seal.

(14) Gently lift up and remove radiator from vehi-

cle. Be careful not to scrape the radiator fins against
any other component. Also be careful not to disturb
the air conditioning condenser (if equipped) (Fig. 48).

INSTALLATION

CAUTION: Before installing the radiator or A/C con-
denser, be sure the radiator-to-body and radiator-to-
A/C condenser rubber air seals (Fig. 44) are properly
fastened to their original positions. These are used
at the top, bottom and sides of the radiator and A/C
condenser. To prevent overheating, these seals must
be installed to their original positions.

(1) Equipped with air conditioning: Gently lower

the radiator into the vehicle. Guide the two radiator
alignment dowels through the holes in the rubber air
seals first and then through the A/C support brackets
(Fig. 46). Continue to guide the alignment dowels
into the rubber grommets located in lower radiator
crossmember. The holes in the L-shaped brackets
(located on bottom of A/C condenser) must be posi-
tioned between bottom of rubber air seals and top of
rubber grommets.

Fig. 45 Viscous Fan Drive 4.7L Engine

1 – SPECIAL TOOL 6958 SPANNER WRENCH WITH ADAPTER

PINS 8346

2 – FAN

Fig. 46 Radiator Alignment Dowels

1 – RADIATOR
2 – ALIGNMENT DOWEL
3 – RADIATOR LOWER ISOLATOR
4 – RADIATOR LOWER CROSSMEMBER

7 - 36

COOLING SYSTEM

REMOVAL AND INSTALLATION (Continued)

(2) Connect the radiator upper and lower hoses

and hose clamps to radiator (Fig. 48).

CAUTION: The tangs on the hose clamps must be
positioned straight down.

(3) Install coolant reserve/overflow tank hose at

radiator (Fig. 48) (Fig. 47).

(4) Connect both transmission cooler lines at the

radiator (Fig. 48) (Fig. 47).

(5) Install both radiator mounting bolts (Fig. 48)

(Fig. 47).

(6) Install air inlet duct at grill.
(7) Attach electric fan harness to shroud, then con-

nect harness to connector (all 4.7L engines and heavy
cooling 4.0L only) (Fig. 48) (Fig. 47).

(8) Install the grill. Refer to group 23, Body.
(9) Install the fan/viscous fan drive assembly to

the water pump.

(10) Rotate the fan blades (by hand) and check for

interference at fan shroud.

(11) Be sure of at least 25 mm (1.0 inch) between

tips of fan blades and fan shroud.

(12) Fill cooling system.
(13) Connect battery cable at battery.
(14) Start and warm engine. Check for leaks.

WATER PUMP BYPASS HOSE—4.0L ENGINE

REMOVAL

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, SUCH AS SPECIAL CLAMP TOOL (NUMBER
6094) (Fig. 49). SNAP-ON CLAMP TOOL (NUMBER
HPC-20) MAY BE USED FOR LARGER CLAMPS.
ALWAYS WEAR SAFETY GLASSES WHEN SERVIC-
ING CONSTANT TENSION CLAMPS.

CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 50). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.

(1) Partially drain cooling system. Refer to Drain-

ing Cooling System in this group.

(2) Do not waste reusable coolant. If solution is

clean, drain coolant into a clean container for reuse.

(3) Loosen both bypass hose clamps (Fig. 49) and

position to center of hose. Remove hose from vehicle.

Fig. 47 Radiator, Shroud and Electric Fan—4.0L

Engine

1 – RADIATOR/SHROUD/FAN ASSEMBLY
2 – OVER FLOW HOSE
3 – ELECTRIC FAN CONNECTOR
4 – RADIATOR MOUNTING BOLT(S)
5 – CLAMP

Fig. 48 Radiator, Shroud and Electric Fan—4.7L

Engine

1 – RADIATOR/SHROUD/FAN ASSEMBLY
2 – CLAMP
3 – OVER FLOW HOSE
4 – ELECTRIC FAN CONNECTOR
5 – RADIATOR MOUNTING BOLT(S)

COOLING SYSTEM

7 - 37

REMOVAL AND INSTALLATION (Continued)

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