Jeep Wrangler 1997 Manual page 810

14- 38 FUEL SYSTEM
REMOVAL AND INSTALLATION (Continued)
REMOVAL
WARNING : THE EXHAUST MANIFOLD, EXHAUST
PIPES AND CATALYTIC CONVERTER BECOME
VERY HOT DURING ENGINE OPERATION . ALLOW
ENGINE TO COOL BEFORE REMOVING OXYGEN
SENSOR .
(1) Raise and support vehicle .
(2) Disconnect wire connector from 02S sensor .
CAUTION :
When disconnecting sensor electrical
connector, do not pull directly on wire going into
sensor.
(3) Remove 02S sensor. Snap-On oxygen sensor
wrench number YA 8875 (or equivalent) may be used
for removal and installation .
INSTALLATION
Threads of new oxygen sensors are factory coated
with anti-seize compound to aid in removal . DO
NOT add any additional anti-seize compound to
the threads of a new oxygen sensor.
(1) Install 02S sensor. Tighten to 30 N-m (22 ft .
lbs .) torque .
(2) Connect 02S sensor wire connector.
(3) Lower vehicle .
AIR CLEANER ELEMENT
REMOVAL/INSTALLATION
(1) Loosen air tube clamp at housing cover (Fig.
43) .
(2) Disconnect air tube at cover.
(3) Pry back the clips retaining air cleaner cover to
air cleaner housing.
(4) Lift cover up to expose air cleaner element .
(5) Remove air cleaner element .
(6) Clean inside of air cleaner housing and its
cover before installing new element.
(7) Reverse the preceding operation for installa-
tion . Be sure air cleaner cover is properly seated to
air cleaner housing.
ENGINE COOLANT TEMPERATURE SENSOR
The coolant temperature sensor is installed in the
thermostat housing (Fig . 44) .
REMOVAL
(1) Partially drain cooling system until coolant
level is below cylinder head . Observe the WARN-
INGS in Group 7, Cooling.
(2) Disconnect coolant temperature sensor wire
connector .
(3) Remove sensor from thermostat housing .
COVER
ENGINE
COOLANT
TEMPERATURE
SENSOR
CLAMP
Fig. 43 Air Cleaner Element
TJ
AIR TUBE
HOUSING
80a4a5d6
ELECTRICAL
CONNECTOR
Fig. 44 Engine Coolant Temperature Sensor-
Typical
INSTALLATION
(1) Apply sealant to sensor threads (new replace-
ment sensors will have sealant already applied) .
(2) Install coolant temperature sensor into thermo-
stat housing. Tighten to 11 N-m (8 ft . lbs.) torque .
(3) Connect wire connector.
(4) Fill cooling system . Refer to Group 7, Cooling
System .
INTAKE MANIFOLD AIR TEMPERATURE SENSOR
The intake manifold air temperature sensor is
installed into the intake manifold plenum near the
throttle body (Fig . 45) .