Coolant Replacement; Removal And Installation; Radiator - Jeep 1997 Grand Cherokee Service Manual

7 - 18 COOLING SYSTEM
SERVICE PROCEDURES (Continued)
(1) Tighten the

radiator

removed), the cylinder block drain-plug.
(2) Remove the plastic radiator fill vent valve
(unscrews counter- clockwise) from the radiator. The
fill vent valve is located on the top of the right radi-
ator tank (Fig. 13).
Fig. 13 Radiator Fill Vent Valve
(3) With the fill vent valve removed, proceed to fill
the system using a 50/50 mixture of water and anti-
freeze as described in the Coolant section of this
group.
(4) Continue to fill the cooling system until coolant
is observed escaping from the fill vent opening. When
this occurs, install the fill vent valve. The plastic
fill vent valve is equipped with a rubber o-
ring. Do not over tighten the fill vent valve.
(5) Continue to fill the system until the coolant
tank is full.
(6) Install and tighten the coolant tank pressure/
vent cap. Do not use any type of tool when tight-
ening the cap. Hand tighten only.
(7) With the heater control unit in the HEAT posi-
tion, operate engine with coolant tank cap tightened.
(8) After engine has reached normal operating
temperature, shut engine off and allow it to cool.
(9) Remove coolant tank cap.
(10) Add coolant into the coolant tank up to the
COLD mark. If possible, only add coolant when
the engine is cold. Coolant level in a warm
engine will be higher in the tank due to ther-
mal expansion.
(11) After the engine has been operated through a
few heat-up and cool-down cycles, recheck the coolant
level in the tank.
draincock and (if

COOLANT REPLACEMENT

It is recommended that the cooling system be
drained and flushed at 84,000 kilometers (52,500
miles), or 3 years, whichever occurs first. Then every
two years, or 48,000 kilometers (30,000 miles),
whichever occurs first.

REMOVAL AND INSTALLATION

RADIATOR
WARNING: DO NOT REMOVE THE CYLINDER
BLOCK DRAIN-PLUG, THE COOLANT TANK CAP,
THE RADIATOR FILL VENT VALVE, OR LOOSEN
THE RADIATOR DRAINCOCK WITH THE SYSTEM
HOT AND PRESSURIZED. SERIOUS BURNS FROM
THE COOLANT CAN OCCUR.
DO NOT WASTE reusable coolant. If solution is
clean, drain 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 (Fig. 14).
GLASSES WHEN SERVICING CONSTANT TENSION
CLAMPS.
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 15). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.
Fig. 14 Hose Clamp Tool
ALWAYS WEAR SAFETY
ZG