Subaru Legacy 2004 Service Manual page 1055

14.Front Oxygen (A/F) Sensor
A: REMOVAL
1) Remove the collector cover.
2) Disconnect the ground cable from battery.
3) Disconnect the connector from front oxygen (A/
F) sensor.
4) Apply spray-type lubricant to the threaded por-
tion of front oxygen (A/F) sensor, and leave it for
one minute or more.
5) Remove the front oxygen (A/F) sensor.
CAUTION:
When removing the oxygen (A/F) sensor, wait
until exhaust pipe cools, otherwise it will dam-
age exhaust pipe.
B: INSTALLATION
1) Before installing front oxygen (A/F) sensor, ap-
ply anti-seize compound only to the threaded por-
tion of front oxygen (A/F) sensor to make the next
removal easier.
Anti-seize compound:
SS-30 JET LUBE
CAUTION:
Never apply anti-seize compound to protector
of front oxygen (A/F) sensor.
2) Install the front oxygen (A/F) sensor.
Tightening torque:
!
21 N m (2.1 kgf-m, 15.2 ft-lb)
Front Oxygen (A/F) Sensor
3) Connect the connector of front oxygen (A/F)
sensor.
4) Connect the battery ground cable to battery.
IN-00203
5) Install the collector cover.
FU-01193
FU(H4DOTC)-33
FUEL INJECTION (FUEL SYSTEMS)
FU-01193
IN-00203