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7 - 28
COOLING SYSTEM
REMOVAL AND INSTALLATION (Continued)
CAUTION :
A number or letter is stamped into the
tongue of constant tension clamps (Fig. 26) . If
replacement is necessary, use only an original
equipment clamp with matching number or letter.
(2) Remove radiator upper hose and heater hose at
thermostat housing .
(3) Disconnect wiring connector at engine coolant
temperature sensor.
(4) Remove thermostat housing mounting bolts,
thermostat housing, gasket and thermostat (Fig. 28) .
Discard old gasket .
(5) Clean the gasket mating surfaces .
LONG
GASKET
THERMOSTAT
BOLT
SHORT
BOLT
J9307-13
Fig. 28 Thermostat Removalllnstallation
(6)
Clean the gasket mating surfaces .
INSTALLATION
(1)
Install the replacement thermostat
so
that the
pellet, which is encircled by a coil spring, faces the
engine . All thermostats are marked on the outer
flange to indicate the proper installed position.
(2) Observe the recess groove
in
the engine cylin-
der head (Fig . 29) .
(3) Position thermostat into this groove with arrow
and air bleed hole on outer flange, pointing up .
(4)
Install replacement gasket and thermostat
housing .
CAUTION :
Tightening
the
thermostat
housing
unevenly or with the thermostat out of its recess
may result in a cracked housing .
(5) Tighten the housing bolts to 20 N-m (15 ft. lbs .)
torque .
TJ
GROOVE
J9307-25
Fig. 29 Thermostat Recess
(6)
Install hoses to thermostat housing.
(7) Install electrical connector to coolant tempera-
ture sensor.
(8) Be sure that the radiator draincock is tightly
closed . Fill the cooling system to the correct level
with the required coolant mixture . Refer to Refilling
Cooling System in this group .
(9) Start and warm the engine . Check for leaks .
RADIATOR
REMOVAL
WARNING :
DO NOT REMOVE THE CYLINDER
BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAINCOCK WITH THE SYSTEM HOT AND PRES-
SURIZED. SERIOUS BURNS FROM THE COOLANT
CAN OCCUR .
(1) Disconnect negative battery cable at battery.
(2) Observe the previous WARNINGS. Remove the
radiator cap.
(3) Position drain pan under draincock . Open radi-
ator draincock and drain radiator.DO NOT WASTE
reusable coolant . If solution is clean, drain coolant
into a clean container for reuse. DO NOT WASTE
reusable coolant . If solution is clean, drain coolant
into a clean container for reuse.
(4) Remove radiator upper and lower hose clamps .
Remove radiator hoses.
(5) Disconnect coolant reserve/overflow tank hose
from radiator.
(6) Remove the four fan shroud mounting bolts
(Fig . 30) . On some models the power steering fluid
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Table of Contents
Troubleshooting
