Subaru Legacy IV (2008 year). Manual - part 453

FU(H6DO)-31

Oil Temperature Sensor

FUEL INJECTION (FUEL SYSTEMS)

14.Oil Temperature Sensor

A: REMOVAL

1) Remove the collector cover.
2) Disconnect the ground cable from battery.

3) Remove the air intake chamber. <Ref. to
IN(H6DO)-7, REMOVAL, Air Intake Chamber.>
4) Disconnect the connector from the oil tempera-
ture sensor.

5) Remove the oil temperature sensor.

B: INSTALLATION

Install in the reverse order of removal.

Tightening torque:

22 N·m (2.2 kgf-m, 16.2 ft-lb)

IN-00203

FU-02138

FU(H6DO)-32

Front Oxygen (A/F) Sensor

FUEL INJECTION (FUEL SYSTEMS)

15.Front Oxygen (A/F) Sensor

A: REMOVAL

1) Set the vehicle on a lift.
2) Disconnect the ground cable from the battery.

3) Lift up the vehicle.
4) Disconnect the connector of front oxygen (A/F)
sensor.
• LH  side

• RH side

5) Apply spray-type lubricant to the threaded por-
tion of front oxygen (A/F) sensor, and leave it for
one minute or more.

6) Remove the front oxygen (A/F) sensor.

CAUTION:
When removing the front oxygen (A/F) sensor,
wait until exhaust pipe cools, otherwise it will
damage the exhaust pipe.
• LH  side

• RH  side

IN-00203

FU-02139

FU-02140

FU-02141

FU-02142

FU(H6DO)-33

Front Oxygen (A/F) Sensor

FUEL INJECTION (FUEL SYSTEMS)

B: INSTALLATION

CAUTION:
If lubricant is spilt onto the exhaust pipe, wipe it
off with cloth to avoid emission of smoke or
causing a fire.
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.

CAUTION:
Never apply anti-seize compound to the protec-
tor of front oxygen (A/F) sensor.

Anti-seize compound:

NEVER-SEEZ NSN, JET LUBE SS-30 or 
equivalent

2) Install the front oxygen (A/F) sensor.

Tightening torque:

21 N·m (2.1 kgf-m, 15.5 ft-lb)

• LH  side

• RH side

3) Connect the connector of front oxygen (A/F)
sensor.
• LH  side

• RH  side

4) Lower the vehicle.
5) Connect the ground cable to battery.

FU-02141

FU-02142

FU-02139

FU-02140

IN-00203

FU(H6DO)-34

Rear Oxygen Sensor

FUEL INJECTION (FUEL SYSTEMS)

16.Rear Oxygen Sensor

A: REMOVAL

1) Set the vehicle on a lift.
2) Disconnect the ground cable from the battery.

3) Lift up the vehicle.
4) Disconnect the connector from rear oxygen sen-
sor.
• LH  side

• RH side

5) Remove the clip holding the harness.
6) Apply spray-type lubricant to the threaded por-
tion of rear oxygen sensor, and leave it for one
minute or more.

7) Remove the rear oxygen sensor.

CAUTION:
When removing the rear oxygen sensor, wait
until exhaust pipe cools, otherwise it will dam-
age the exhaust pipe.
• LH  side

• RH  side

IN-00203

FU-02143

FU-02144

FU-02145

FU-02146