Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 58

IN(STI)-14

Intercooler

INTAKE (INDUCTION)

7) Install the bolts (C) which secures the air by-

pass valve to the intercooler, and install the air by-

pass valve.
NOTE:

Use a new gasket.
Tightening torque:

T1: 3 N·m (0.3 kgf-m, 2.2 ft-lb)

T2: 16 N·m (1.6 kgf-m, 11.8 ft-lb)

8) Install the PCV pipe to the intercooler.
Tightening torque:

5.5 N·m (0.6 kgf-m, 4.1 ft-lb)

C: DISASSEMBLY

1) Remove the intercooler duct from the intercool-

er.

2) Remove the intake duct from intercooler duct.

D: ASSEMBLY

1) Install the intake duct to the intercooler duct.
Tightening torque:

3 N·m (0.3 kgf-m, 2.2 ft-lb)

2) Install the intercooler duct to the intercooler.
NOTE:

Use a new gasket.
Tightening torque:

16 N·m (1.6 kgf-m, 11.8 ft-lb)

E: INSPECTION

1) Check that the intercooler and intercooler duct

have no deformation, cracks or other damages.

2) Check that the hose and intake duct have no

cracks, damage or loose part.

IN-03502

(A)

(B)

(C)

T1

T2

IN-03078

IN-03496

IN-02350

IN-02350

IN-03496

IN(STI)-15

Turbocharger

INTAKE (INDUCTION)

7. Turbocharger

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Lift up the vehicle.

3) Drain approximately 3.0 L (3.2 US qt, 2.6 Imp qt)

of coolant. <Ref. to CO(STI)-13, DRAINING OF

ENGINE COOLANT, REPLACEMENT, Engine

Coolant.>

4) Lower the vehicle.

5) Remove the intercooler. <Ref. to IN(STI)-12,

REMOVAL, Intercooler.>

6) Remove the intercooler stay.

7) Remove the center exhaust pipe. <Ref. to

EX(STI)-8, REMOVAL, Center Exhaust Pipe.>

8) Lower the vehicle.

9) Remove the joint pipe from the turbocharger.

10) Disconnect the engine coolant hose from the

upper side of the water pipe.

11) Disconnect the air control hose (A), and loosen

the clamp holding the intake duct to the turbocharg-

er.

12) Remove the oil inlet pipe from the turbocharg-

er.
CAUTION:

In order to prevent damaging the oil pipe on the

cylinder head side, fix the section (a) shown in

the figure when loosing the oil inlet pipe flare

nut, and avoid the part from rotating together

while loosening the nut.

IN-00203

EX-00007

IN-02390

IN-02594

IN-02930

(A)

(a)

IN-02955

IN-02633

IN(STI)-16

Turbocharger

INTAKE (INDUCTION)

13) Disconnect the engine coolant hose from the

lower side of the water pipe.

14) Disconnect the oil outlet hose from the oil outlet

pipe, and remove the turbocharger.

15) Remove the turbocharger stay.

B: INSTALLATION

1) Install the turbocharger stay.
Tightening torque:

T1: 33 N·m (3.4 kgf-m, 24.3 ft-lb)

T2: 42.5 N·m (4.3 kgf-m, 31.3 ft-lb)

2) Connect the oil outlet hose to the oil outlet pipe.

3) Connect the engine coolant hose to the lower

side of the water pipe.

(A) To cylinder head RH
(B) To cylinder block RH

IN-02931

IN-02310

IN-02859

(A)

(A)

(B)

(A) To cylinder head RH
(B) To cylinder block RH

T1

IN-02860

(A)

(A)

(B)

T2

IN-02310

IN-02931

IN(STI)-17

Turbocharger

INTAKE (INDUCTION)

4) Temporarily tighten the union bolts and flare

nuts which secure the oil inlet pipe to the turbo-

charger.
NOTE:

Use a new gasket.

5) Tighten the union bolts and flare nuts which se-

cure the oil inlet pipe to the turbocharger.
CAUTION:

In order to prevent damaging the oil pipe on the

cylinder head side, fix the section (a) shown in

the figure when tightening the oil inlet pipe flare

nut, and avoid the part from rotating together

while tightening the nut.

Tightening torque:

T1: 16 N·m (1.6 kgf-m, 11.8 ft-lb)

T2: 20 N·m (2.0 kgf-m, 14.8 ft-lb)

6) Connect the air control hose (A), and install the

intake duct to the turbocharger.
Tightening torque:

3 N·m (0.3 kgf-m, 2.2 ft-lb)

7) Connect the engine coolant hoses to the upper

side of the water pipe.

8) Install the joint pipe to turbocharger.
NOTE:

Use a new gasket.
Tightening torque:

42.5 N·m (4.3 kgf-m, 31.3 ft-lb)

9) Lift up the vehicle.

10) Install the center exhaust pipe. <Ref. to

EX(STI)-9, INSTALLATION, Center Exhaust

Pipe.>

11) Lower the vehicle.

IN-02633

(a)

IN-02955

IN-02613

T1

T2

IN-02930

(A)

IN-02594

IN-02390