Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 56
IN(STI)-6
General Description
INTAKE (INDUCTION)
B: CAUTION
• Prior to starting work, pay special attention to the following:
1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective
goggles, etc. if necessary.
2. Protect the vehicle using a seat cover, fender cover, etc.
3. Prepare the service tools, clean cloth, containers to catch grease and oil, etc.
• Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated
parts.
• When performing a repair, identify the cause of trouble and avoid unnecessary removal, disassembly and
replacement.
• Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from battery.
• Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.
• Remove contamination including dirt and corrosion before removal, installation, disassembly or assembly.
• Keep the removed parts in order and protect them from dust and dirt.
• All removed parts, if to be reused, should be reinstalled in the original positions with attention to the correct
directions, etc.
• Bolts, nuts and washers should be replaced with new parts as required.
• Be sure to tighten the fasteners including bolts and nuts to the specified torque.
C: PREPARATION TOOL
1. GENERAL TOOL
TOOL NAME
REMARKS
Mighty Vac
Used for checking waste gate actuator and air by-pass valve.
IN(STI)-7
Air Cleaner Element
INTAKE (INDUCTION)
2. Air Cleaner Element
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the air intake duct. <Ref. to IN(STI)-10,
3) Disconnect the connector (A) from air flow and
intake air temperature sensor.
4) Remove the clips (B) from the air cleaner case
(front).
5) Open the air cleaner case, and remove the air
cleaner element.
B: INSTALLATION
Install in the reverse order of removal.
CAUTION:
Be sure to use SUBARU genuine air cleaner el-
ement depending on the engine type when re-
placing the air cleaner elements. Using other air
cleaner element may affect the engine perfor-
mance.
NOTE:
• Check that there are no foreign objects in the air
cleaner case.
• If the protrusion of the air cleaner case (rear) is
removed when removing the air cleaner element,
align the protrusion of the air cleaner case (rear) to
the hole on the air cleaner case (front) to install.
C: INSPECTION
1) Check that the air cleaner element has no defor-
mation, cracks or other damages.
2) Check the air cleaner element for excessive dirt.
IN-00203
IN-02335
(A)
(B)
(B)
IN-02336
IN-02376
IN(STI)-8
Air Cleaner Case
INTAKE (INDUCTION)
3. Air Cleaner Case
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the air intake duct. <Ref. to IN(STI)-10,
3) Disconnect the connector (A) from air flow and
intake air temperature sensor.
4) Loosen the clamp (B) which holds the air intake
boot.
5) Remove the clip (C) from the air cleaner case
(front).
6) Remove the air cleaner case (rear) and air in-
take boot.
7) Remove the air cleaner element.
8) Remove bolts (A) and nuts (B) which secure the
air cleaner case (front) to the body, and remove the
air cleaner case (front).
B: INSTALLATION
1) Install the bolt (A) and nut (B) which secure the
air cleaner case (front) to the body.
Tightening torque:
Bolt (A)
6 N·m (0.6 kgf-m, 4.4 ft-lb)
Nut (B)
7.5 N·m (0.8 kgf-m, 5.5 ft-lb)
2) Install the air cleaner element.
3) Install the air cleaner case (rear) and air intake
boot.
NOTE:
When installing the air cleaner case (rear), align the
protrusion of the air cleaner case (rear) to the hole
on the air cleaner case (front) to install.
Tightening torque:
2.5 N·m (0.3 kgf-m, 1.8 ft-lb)
4) Install the clip (B) to the air cleaner case (front).
IN-00203
IN-02337
(A)
(B)
(C)
(C)
(B)
IN-02338
(A)
(B)
IN-02338
(A)
(B)
IN-02376
IN-02431
IN(STI)-9
Air Cleaner Case
INTAKE (INDUCTION)
5) Connect the connector (A) to the mass air flow
and intake air temperature sensor.
6) Install the air intake duct. <Ref. to IN(STI)-10, IN-
7) Connect the ground cable to battery.
C: INSPECTION
1) Check that the air cleaner case has no deforma-
tion, cracks or other damages.
2) Check that the air intake boot has no cracks,
damage or loose part.
IN-02335
(A)
(B)
(B)
IN-00203
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