Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 34

FU(STI)-48

Tumble Generator Valve Assembly

FUEL INJECTION (FUEL SYSTEMS)

12.Tumble Generator Valve As-

sembly

A: REMOVAL

1) Release the fuel pressure. <Ref. to FU(STI)-67,

RELEASING  OF  FUEL  PRESSURE,  PROCE-

DURE, Fuel.>

2) Disconnect the ground cable from battery.

3) Open the fuel filler lid and remove the fuel filler

cap.

4) Remove the intake manifold. <Ref. to FU(STI)-

17, REMOVAL, Intake Manifold.>

5) Disconnect the connector from the tumble gen-

erator valve assembly.

6) Remove  the  fuel  injector.  <Ref.  to  FU(STI)-45,

REMOVAL, Fuel Injector.>

7) Remove  the  tumble  generator  valve  assembly

from the intake manifold.

B: INSTALLATION

Install in the reverse order of removal.
NOTE:

Use a new gasket.
Tightening torque:

8.3 N·m (0.8 kgf-m, 6.1 ft-lb)

C: INSPECTION

1) Check that the tumble generator valve assembly

has no deformation, cracks or other damages.

2) Check tumble generator valve for contamination

or clogging.

IN-00203

FU-04604

FU-03603

FU(STI)-49

Tumble Generator Valve Actuator

FUEL INJECTION (FUEL SYSTEMS)

13.Tumble Generator Valve Ac-

tuator

A: SPECIFICATION

The  tumble  generator  valve  assembly  cannot  be

disassembled.

Refer  to  “Tumble  Generator  Valve  Assembly”  for

removal  and  installation  procedures.  <Ref.  to

FU(STI)-48, REMOVAL, Tumble Generator Valve

Assembly.> <Ref. to FU(STI)-48, INSTALLATION,

Tumble Generator Valve Assembly.>

FU(STI)-50

Oil Flow Control Solenoid Valve

FUEL INJECTION (FUEL SYSTEMS)

14.Oil Flow Control Solenoid 

Valve

A: REMOVAL

1. INTAKE SIDE

Oil  flow  control  solenoid  valve  is  a  unit  with  front

camshaft cap.

Refer to “Camshaft” for removal procedures. <Ref.

to ME(STI)-61, REMOVAL, Camshaft.>

2. EXHAUST SIDE

1) Disconnect the ground cable from battery.

2) Lift up the vehicle.

3) Remove  the  under  cover.  <Ref.  to  EI-28,  RE-

MOVAL, Front Under Cover.>

4) Remove the front exhaust pipe. (right side only.)

<Ref.  to  EX(STI)-6,  REMOVAL,  Front  Exhaust

Pipe.>

5) Remove  the  engine  harness  cover.  (right  side

only.)

6) Disconnect the ground cable (A). (left side only)

7) Disconnect  the  connector  (B)  from  the  oil  flow

control solenoid valve, and remove the oil flow con-

trol solenoid valve from the cylinder head.

B: INSTALLATION

1. INTAKE SIDE

Refer  to  “Camshaft”  for  installation  procedure.

<Ref. to ME(STI)-64, INSTALLATION, Camshaft.>

2. EXHAUST SIDE

Install in the reverse order of removal.
NOTE:

Use a new gasket.
Tightening torque:

T1: 7.5 N·m (0.8 kgf-m, 5.5 ft-lb)

T2: 10 N·m (1.0 kgf-m, 7.4 ft-lb)

Tightening torque:

5 N·m (0.5 kgf-m, 3.7 ft-lb)

IN-00203

FU-03616

FU-05832

(A)

(B)

FU-03605

T1

T2

T2

FU-03616

FU(STI)-51

Oil Flow Control Solenoid Valve

FUEL INJECTION (FUEL SYSTEMS)

C: DISASSEMBLY

1. INTAKE SIDE

1) Remove the two mounting bolts securing oil re-

turn  cover,  and  remove  the  oil  return  cover  and

gasket.

2) Remove the bolt securing oil flow control sole-

noid valve, and remove the oil flow control solenoid

valve.

2. EXHAUST SIDE

The oil flow control solenoid valve on the exhaust

side cannot be disassembled.

D: ASSEMBLY

1. INTAKE SIDE

1) Install the oil flow control solenoid valve.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

2) Apply liquid gasket to the two bolts securing oil

return cover.
Liquid gasket:

THREE BOND 1324 (Part No. 004403042)

3) Attach the oil return cover and gasket.
Tightening torque:

9 N·m (0.9 kgf-m, 6.6 ft-lb)

NOTE:

Use a new gasket.

2. EXHAUST SIDE

The oil flow control solenoid valve on the exhaust

side cannot be disassembled.

E: INSPECTION

1) Check that the oil flow control solenoid valve has

no deformation, cracks or other damages.

2) Measure  the  resistance  between  the  oil  flow

control solenoid valve terminals.

(A) Oil flow control solenoid valve
(B) Oil return cover

(C) Gasket
(D) Front camshaft cap

FU-05699

(A)

(D)

(C)

(B)

(A) Oil flow control solenoid valve
(B) Oil return cover

(C) Gasket
(D) Front camshaft cap

Terminal No.

Standard

1 and 2

7.4±0.5 Ω 

(when 20°C (68°F))

FU-05700

(A)

(D)

(C)

(B)

2 1

EC-02428