Subaru Legacy IV (2008 year). Manual - part 36

FU(H4SO)-33

Variable Valve Lift Diagnosis Oil Pressure Switch

FUEL INJECTION (FUEL SYSTEMS)

13.Variable Valve Lift Diagnosis 

Oil Pressure Switch

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the air intake chamber. <Ref. to
IN(H4SO)-7, REMOVAL, Air Intake Chamber.>
3) Disconnect the connector from the variable
valve lift diagnosis oil pressure switch.
4) Remove the variable valve lift diagnosis oil pres-
sure switch.
• LH  side

• RH side

B: INSTALLATION

Install in the reverse order of removal.

NOTE:
Apply liquid gasket to the variable valve lift diagno-
sis oil pressure switch threads.

Liquid gasket:

THREE BOND 1324 (Part No. 004403042) or 
equivalent

Tightening torque:

17 N·m (1.7 kgf-m, 12.5 ft-lb)

IN-00203

FU-02731

FU-02732

FU(H4SO)-34

Oil Temperature Sensor

FUEL INJECTION (FUEL SYSTEMS)

14.Oil Temperature Sensor

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the air intake chamber. <Ref. to
IN(H4SO)-7, REMOVAL, Air Intake Chamber.>
3) Remove the engine harness connector from the
bracket.
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.

NOTE:
Apply liquid gasket to the oil temperature sensor
threads.

Liquid gasket:

THREE BOND 1324 (Part No. 004403042) or 
equivalent

Tightening torque:

18 N·m (1.8 kgf-m, 13.3 ft-lb)

IN-00203

FU-02733

FU(H4SO)-35

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 battery.

3) Remove the air intake duct. <Ref. to IN(H4SO)-
8, REMOVAL, Air Intake Duct.>
4) Remove the clip fastening the harness and dis-
connect the front oxygen (A/F) sensor connector.

5) Lift up the vehicle.
6) Remove the under cover.
7) Apply spray-type lubricant to the threaded por-
tion of front oxygen (A/F) sensor, and leave it for
one minute or more.

8) 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.

(A) Front oxygen (A/F) sensor connector

(B) Rear oxygen sensor connector

(C) Clip

IN-00203

(C)

(B)

(A)

EX-02350

(A) Front oxygen (A/F) sensor

(B) Rear oxygen sensor

(A)

(B)

FU-02735

FU(H4SO)-36

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)

3) Install the under cover.
4) Lower the vehicle.
5) Connect the connector of front oxygen (A/F)
sensor connector and fasten the harness with clips.

6) Connect the ground cable to battery.

(A) Front oxygen (A/F) sensor

(B) Rear oxygen sensor

(A) Front oxygen (A/F) sensor connector

(B) Rear oxygen sensor connector

(C) Clip

(A)

(B)

FU-02735

(C)

(B)

(A)

EX-02350

IN-00203