Subaru 1600 Service Manual page 74

9. Oxycen (0
2 )
Sensor
Oxygen (0,) sensor is installed on
front exhaust pipe, and 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.
A5-679
Fig. 3·39
1)
Removal
1) Disconnect 0, sensor cord.
2) Apply SUBARU GUARD
(000902821) or its equivalent to
threaded portion of oxygen (0,)
sensor, and leave it for one minute or
more.
ENGINE
3) Loosen oxygen (0,) sensor by
turning it 10 to 40 degrees with special
tool (Socket: 499990100) and wrench.
AS'S80
Fig. 3-40
4) Apply SUBARU GUARD
(000902821) to threaded portion of
oxygen (Ol) sensor again, and leave it
for one minute or more.
S) Remove oxygen (0,) sensor by
using special tool (Socket: 499990100)
and wrench.
NOTE:
When removing, do not force oxygen
(0
2 )
sensor especially when front
exhaust pipe is cold; othelWise it will
damage the front 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 (0,) sensor to make
the next removal easier.
NOTE:
Never apply anti-seize compound to
protector of oxygen
(0
2 )
sensor.
2) By using special tool (Socket:
499990100) and torque wrench, install
oxygen (0,) sensor onto front exhaust
pipe by tightening it to the specified
torque.
Torque
[oxygen (Ol)
sensor}
22 - 29 N'm
(2.2 - 3.0 kg-m,
16 - 22 ft-Ib)
3) Securely connect oxygen (0,)
sensor cord.