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ON-CAR SERVICES
[09A2] 2-2
fig . 7 7
9. Oxygen (02) Sensor
A: REPLACEMENT
Oxygen (Oz) sensor is one of the important emission
control parts. Therefore, replace it as follows only when
it is damaged by external force, or if it seems to be out
of order according to troubleshooting etc.
1 . REMOVAL
1) Disconnect Oz sensor cord .
2) Apply SUBARU CRC (004301003) or its equivalent to
threaded portion of oxygen (Oz) sensor, and leave it for
one minute or more .
3) Loosen oxygen (O2) sensor by turning it 10 to 40
degrees with special tool (SOCKET: 499990110) and
wrench .
4) Apply SUBARU CRC (004301003) to threaded por-
tion of oxygen (OZ) sensor again, and leave it for one
minute or more .
5) Remove oxygen (OZ) sensor by using socket and
wrench .
When removing, do not force oxygen (OZ) sensor
especially when exhaust pipe is cold ; otherwise it will
damage the exhaust pipe .
2. INSTALLATION
1) Apply anti-seize compound ("SS-30" made by JET-
LUBE Inc. in U .S .A . or its equivalent) only to threaded
portion of oxygen (02) sensor to make the next removal
easier .
Never apply anti-seize compound to protector of oxy-
gen (OZ) sensor.
2) By using socket and torque wrench, install oxygen
(OZ) sensor onto front exhaust pipe by tightening it to
the specified torque .
Torque [oxygen (OZ) sensor]:
25 - 34 N"m (2 .5 - 3.5 kg-m, 18 - 25 ft-Ib)
3) Securely connect oxygen (Oz) sensor cord .
7
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Troubleshooting
