Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service 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,
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-
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,
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,
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
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