Subaru Legacy IV (2008 year). Service manual - part 235

FU(H4DOTC)-43

Tumble Generator Valve Position Sensor

FUEL INJECTION (FUEL SYSTEMS)

14.Tumble Generator Valve 

Position Sensor

A: SPECIFICATION

The tumble generator valve assembly cannot be
disassembled.
Refer to “Tumble Generator Valve Assembly” for
removal and installation procedures. <Ref. to
FU(H4DOTC)-41, REMOVAL, Tumble Generator
Valve Assembly.> <Ref. to FU(H4DOTC)-41, IN-
STALLATION, Tumble Generator Valve Assem-
bly.>

FU(H4DOTC)-44

Oil Flow Control Solenoid Valve

FUEL INJECTION (FUEL SYSTEMS)

15.Oil Flow Control Solenoid 

Valve

A: REMOVAL

Oil flow control solenoid valve is a unit with front
camshaft cap.
Refer to “Camshaft” for removal procedure. <Ref.
to ME(H4DOTC)-58, REMOVAL, Camshaft.>

B: INSTALLATION

Refer to “Camshaft” for installation procedure.
<Ref. to ME(H4DOTC)-59, INSTALLATION, Cam-
shaft.>

C: DISASSEMBLY

1) Remove the 2 mounting bolts and remove the oil
return cover and gasket.
2) Remove the mounting bolt and remove the oil
flow control solenoid valve.

D: ASSEMBLY

1) Install the oil flow control solenoid valve.

Tightening torque:

8 N·m (0.8 kgf-m, 5.9 ft-lb)

2) Apply liquid gasket to the two bolts which secure
the oil return cover.

Liquid gasket:

THREE BOND 1324 (Part No. 004403042) or 
equivalent

3) Attach the oil return cover and gasket.

Tightening torque:

8 N·m (0.8 kgf-m, 5.9 ft-lb)

NOTE:
Use a new gasket.

(A) Oil flow control solenoid valve

(B) Oil return cover

(C) Gasket

(D) Front camshaft cap

FU-03158

(A)

(D)

(C)

(B)

(A) Oil flow control solenoid valve

(B) Oil return cover

(C) Gasket

(D) Front camshaft cap

FU-03158

(A)

(D)

(C)

(B)

FU(H4DOTC)-45

Wastegate Control Solenoid Valve

FUEL INJECTION (FUEL SYSTEMS)

16.Wastegate Control Solenoid 

Valve

A: REMOVAL

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

3) Disconnect the connector from the wastegate
control solenoid valve (A).
4) Disconnect pressure hose (B) from the waste-
gate control solenoid valve.
5) Remove the wastegate control solenoid valve
from the bracket

B: INSTALLATION

Install in the reverse order of removal.

Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

IN-00203

FU-01192

(A)

(B)

FU(H4DOTC)-46

Front Oxygen (A/F) Sensor

FUEL INJECTION (FUEL SYSTEMS)

17.Front Oxygen (A/F) Sensor

A: REMOVAL

1) Set the vehicle on a lift.
2) Remove the collector cover.
3) Disconnect the ground cable from battery.

4) Remove the air intake duct and air cleaner case.
<Ref. to IN(H4DOTC)-9, REMOVAL, Air Intake
Duct.> <Ref. to IN(H4DOTC)-8, REMOVAL, Air
Cleaner Case.>
5) Disconnect the connector from front oxygen (A/
F) sensor.

6) Lift up the vehicle.
7) Remove the under cover.
8) Apply spray-type lubricant or equivalent to the
threaded portion of front oxygen (A/F) sensor, and
leave it for one minute or more.
9) 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.

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:

30 N·m (3.1 kgf-m, 22.1 ft-lb)

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

6) Install the air intake duct and air cleaner case.
<Ref. to IN(H4DOTC)-8, INSTALLATION, Air
Cleaner Case.> <Ref. to IN(H4DOTC)-9, INSTAL-
LATION, Air Intake Duct.>

IN-00203

FU-03235

FU-03994

FU-03994

FU-03235