Front Oxygen (Nf) Sensor - Subaru IMPREZA 2002 Service Manual

FRONT OXYGEN (NF) SENSOR
FUEL INJECTION (FUEL SYSTEMS)
14.Front Oxygen (NF) Sensor
A: REMOVAL
1) Disconnect the battery ground cable.
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2) Disconnect the connector from the front oxygen
(NF) sensor.
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3) Lift-up the vehicle.
4) Apply SUBARU CRC or its equivalent to the
threaded portion of front oxygen (NF) sensor, and
leave it for one minute or more.
SUBARU CRC (Part No. 004301003)
5) Remove the front oxygen (NF) sensor.
CAUTION:
When removing the oxygen (NF) sensor, wait
until exhaust pipe cools, otherwise it will dam-
age exhaust pipe.
B: INSTALLATION
1) Before installing front oxygen (NF) sensor, apply
the anti-seize compound only to the threaded por-
tion of front oxygen (NF) sensor to make the next
removal easier.
An ti-seize compound:
CAUTION:
Never apply anti-seize compound to protector
of front oxygen (NF) sensor.
SS-30 by JET LUBE
2) Install the front oxygen (NF) sensor.
Tightening torque:
21 N.m (2.7 kgf-m, 15.2 ff-lb)
iwer the vehicle.
4) Connect the connector of front oxygen (NF) sen-
sor.
FU(S0HC)-43