Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 29

FU(STI)-28

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

20) Remove the bolts holding the fuel pipe assem-

bly to the intake manifold, and remove the fuel pipe

assembly.

21) Remove the intake duct from intake manifold.

22) Remove the tumble generator valve assembly

from the intake manifold.

23) Remove the nipple from the intake manifold.

D: ASSEMBLY

1) Apply liquid gasket to the nipple threads, and in-

stall the nipple to the intake manifold.
Liquid gasket:

THREE BOND 1105 (Part No. 004403010)

Tightening torque:

T1: 17 N·m (1.7 kgf-m, 12.5 ft-lb)

T2: 25 N·m (2.5 kgf-m, 18.4 ft-lb)

2) Install the tumble generator valve assembly onto

intake manifold.
NOTE:

Use a new gasket.
Tightening torque:

8.3 N·m (0.8 kgf-m, 6.1 ft-lb)

3) Install the air intake duct to the intake manifold.
Tightening torque:

17 N·m (1.7 kgf-m, 12.5 ft-lb)

FU-00051

FU-06580

FU-03603

FU-05787

FU-05788

T1

T2

FU-03603

FU-06580

FU(STI)-29

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

4) Install the fuel pipe assembly to the intake man-

ifold.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

5) Install the fuel injector pipe LH and connect the

LH side fuel hose to the fuel injector pipe LH. <Ref.

to  FU(STI)-97,  CONNECTING  FUEL  DELIVERY

HOSE, FUEL RETURN HOSE AND FUEL HOSE,

INSTALLATION, Fuel Delivery, Return and Evapo-

ration Lines.>

6) Install the fuel injector pipe RH and connect the

RH side fuel hose to the fuel injector pipe RH. <Ref.

to  FU(STI)-97,  CONNECTING  FUEL  DELIVERY

HOSE, FUEL RETURN HOSE AND FUEL HOSE,

INSTALLATION, Fuel Delivery, Return and Evapo-

ration Lines.>

7) Install the engine harness to the intake manifold

and attach the harness brackets holding the engine

harness.
Tightening torque:

19 N·m (1.9 kgf-m, 14.0 ft-lb)

8) Install the fuel injector.
NOTE:

Use new O-rings.

FU-00051

FU-04606

FU-04605

FU-03567

FU-03513

FU(STI)-30

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

9) Install the bolts which hold fuel injector pipe.

• RH side
Tightening torque:

19 N·m (1.9 kgf-m, 14.0 ft-lb)

• LH side
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

Tightening torque:

19 N·m (1.9 kgf-m, 14.0 ft-lb)

10) Connect the connector to the tumble generator

valve assembly.

11) Connect the connectors to the fuel injector.

12) Secure the engine harness to the fuel injector

pipe with the harness band (A).

• RH side

• LH side

13) Install the throttle body to the intake manifold.
NOTE:

Use a new gasket.
Tightening torque:

8 N·m (0.8 kgf-m, 5.9 ft-lb)

FU-03512

FU-03594

FU-03595

FU-04604

FU-03508

FU-05919

(A)

FU-05920

(A)

FU-05692

FU(STI)-31

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

14) Secure the engine harness and vacuum hose

using the clip (A), and secure the engine harness to

the engine harness stay using the clip (B), and in-

stall the bolt which holds the engine harness to the

intake manifold.
Tightening torque:

19 N·m (1.9 kgf-m,14.0 ft-lb)

15) Connect  connector  (A)  to  the  throttle  position

sensor and connector (B) to the manifold pressure

sensor.

16) Install  the  engine  ground  terminal  to  intake

manifold.
Tightening torque:

19 N·m (1.9 kgf-m, 14.0 ft-lb)

17) Install the solenoid valve bracket together with

the wastegate control solenoid valve.
Tightening torque:

T1: 6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

T2: 19 N·m (1.9 kgf-m, 14.0 ft-lb)

18) Connect  the  vacuum  hose  (B)  to  the  intake

duct, then connect the connector (A) to the waste-

gate control solenoid valve.

FU-03565

(A)

(B)

FU-05918

(B)

(A)

FU-03588

FU-06581

T1

T2

FU-06578

(A)

(B)