Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 53

EC(STI)-26

PCV Valve

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

14.PCV Valve

A: REMOVAL

CAUTION:

Do not remove unless the PCV valve is broken.

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

REMOVAL, Intercooler.>

2) Disconnect the vacuum hose (A) from the PCV

valve and remove the PCV valve from the PCV

connector.

B: INSTALLATION

1) Install the PCV valve to the PCV connector and

connect the vacuum hose (A) to the PCV valve.
NOTE:

Apply liquid gasket to the bolt threads of PCV

valve.
Liquid gasket:

THREE BOND 1324 (Part No. 004403042) or

equivalent

Tightening torque:

22.5 N·m (2.3 kgf-m, 16.6 ft-lb)

2) Install the intercooler. <Ref. to IN(STI)-13, IN-

STALLATION, Intercooler.>

C: INSPECTION

1. PCV VALVE

1) Check that the PCV valve has no deformation,

cracks or other damages.

2) Check that air is discharged from (B) when air is

blown into (A).

3) Check that air does not come out from (B) when

air is blown into (A).

2. OTHER INSPECTIONS

Check the vacuum hose for cracks, damage or

looseness.

(A)

EC-02746

(A)

EC-02746

EC-02505

(B)

(A)

EC-02506

(A)

(B)

EC(STI)-27

Secondary Air Pump

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

15.Secondary Air Pump

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the clip (A) which holds the harness on

the harness stay and remove the bolt (B) which

holds the secondary air pump on the vehicle.

3) Disconnect the connector (A) and air duct (B)

from secondary air pump.

4) Remove the secondary air pump from the vehi-

cle and the resonator from the secondary air pump.

B: INSTALLATION

Install in the reverse order of removal.
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)

IN-00203

EC-02691

(B)

(A)

EC-02692

(B)

(A)

(A) Clip
(B) Bolt

EC-03010

(A)

(B)

EC-02304

EC-02268

EC(STI)-28

Secondary Air Pump

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

C: INSPECTION

1. SECONDARY AIR PUMP

1) Check that the secondary air pump has no defor-

mation, cracks or other damages.

2) Connect battery positive terminal to the terminal

No. 2 and battery negative terminal to the terminal

No. 1, and inspect the secondary air pump opera-

tion.
CAUTION:

Do not operate the secondary air pump contin-

uously for 80 seconds or more.

2. OTHER INSPECTIONS

Check that the air duct or resonator has no cracks,

damage or loose part.

EC-02427

2 1

EC(STI)-29

Secondary Air Combination Valve

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

16.Secondary Air Combination

Valve

A: REMOVAL

1. SECONDARY AIR COMBINATION

VALVE LH

1) Disconnect the ground cable from battery.

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

REMOVAL, Intercooler.>

3) Disconnect the connector from the secondary air

combination valve LH.

4) Disconnect the air duct A.

5) Remove the secondary air pipe LH.

6) Remove the secondary air combination valve

LH.

2. SECONDARY AIR COMBINATION

VALVE RH

1) Disconnect the ground cable from battery.

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

REMOVAL, Intercooler.>

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

17, REMOVAL, Intake Manifold.>

4) Disconnect the air duct A.

5) Disconnect the secondary air pipe RH.

6) Remove the secondary air combination valve

RH.

(A) Secondary air combination valve LH
(B) Clip

(C) Air duct A
(D) Gasket

(E) Air duct B

(F) Secondary air pipe LH

(G) Gasket

IN-00203

(G)

(B)

(E)

(B)

(C)

(A)

(F)

(D)

EC-02720

(A) Secondary air combination valve RH
(B) Clip

(C) Air duct A
(D) Gasket

(E) Air duct B

(F) Secondary air pipe RH

(G) Gasket

IN-00203

(B)

(E)

(B)

(C)

(D)

(G)

(F)

(A)

EC-02721