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Engine Intake System (H4SO) (except Sti) Subaru Impreza WRX STI GR

Mechanical 13 illustrations ~735 words

Scheme 289

Scheme 289: COMPONENT
Scheme 289: COMPONENT

Tightening torque: N.m (kgf-m, ft-lb)

T1: 1 (0.1, 0.7)

T2: 3 (0.3, 2.2)

T3: 6 (0.6, 4.4)

T4: 6.5 (0.7, 4.8)

T5: 7.5 (0.8, 5.5)

T6: 16 (1.6, 11.8)

CAUTION

  1. Wear appropriate work clothing, including a cap, protective goggles and protective shoes when performing any work.
  2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
  3. Keep the disassembled parts in order and protect them from dust and dirt.
  4. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly and replacement.
  5. Vehicle components are extremely hot after driving. Be wary of receiving burns from heated parts.
  6. Be sure to tighten fasteners including bolts and nuts to the specified torque.
  7. Place shop jacks or rigid racks at the specified points.
  8. Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from the battery.

Scheme 290

Scheme 290: REMOVAL
Scheme 290: REMOVAL

Scheme 291

Scheme 291
Scheme 291

Scheme 292

Scheme 292
Scheme 292
  1. Disconnect the ground cable from battery.
  2. Disconnect the connector (A) from the mass air flow and intake air temperature sensor, and remove the clip (B).
  3. Loosen the clamp (A) which connects the air cleaner case to intake boot.
  4. Remove the clips (B) securing the upper side of air cleaner case.
  5. Remove the air cleaner case (rear) and air cleaner element.

Scheme 293

Scheme 293
Scheme 293

INSTALLATION

Install in the reverse order of removal.

CAUTIONBe sure to use SUBARU genuine air cleaner element depending on the engine type when replacing the air cleaner elements. Using other air cleaner element may affect the engine performance.

Note. Check that there are no foreign objects in the air cleaner case. 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.

Scheme 294

Scheme 294
Scheme 294

Tightening torque

Clamp (A) 3 N.m (0.3 kgf-m, 2.2 Mb)

INSPECTION

Replace if excessively damaged or dirty.

Scheme 295

Scheme 295
Scheme 295

Scheme 296

Scheme 296
Scheme 296

Scheme 297

Scheme 297
Scheme 297

Scheme 298

Scheme 298
Scheme 298
  1. Disconnect the ground cable from battery.
  2. Remove the air intake duct. REMOVAL, Air Intake Duct.>
  3. Disconnect the connector (A) from the mass air flow and intake air temperature sensor, and remove the clip (B).
  4. Loosen the clamp (A) which connects the air cleaner case to intake boot.
  5. Remove the clips (B) from the air cleaner case (front).
  6. Remove the air cleaner case (rear) and air cleaner element.
  7. Remove the bolt (A) and nut (B) which secure the air cleaner case (front) to the body.
  8. Remove the air cleaner case (front).
  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 case (rear) and air cleaner element. 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.
  3. Install the clips (B) to the air cleaner case (front), then tighten the clamp (A) that connects the air cleaner case (rear) to the intake boot. Tightening torque: Clamp (A) 3 N.m (0.3 kgf-m, 2.2 ft-lb)
  4. Connect the connector (A) to the mass air flow and intake air temperature sensor, and fasten the harness to clip (B).
  5. Install the air intake duct. INSTALLATION, Air Intake Duct.>
  6. Connect the ground cable to battery.

Check for cracks or loose connections.

Scheme 299

Scheme 299: REMOVAL
Scheme 299: REMOVAL
  1. Loosen the clamp (A) which connects air intake chamber to throttle body.
  2. Loosen the clamp (B) which connects intake boot to air intake chamber.
  3. Remove the bolt (C) which secures air intake chamber to the air intake chamber stay.
  4. Disconnect the connector (D).
  5. Disconnect the blow-by hoses, and then remove air intake chamber.

Install in the reverse order of removal.

Tightening torque

Clamp (A), (B)

3 N.m (0.3 kgf-m, 2.2 ft-lb)

Bolt (C)

6.5 N.m (0.7 kgf-m, 4.8 ft-lb)

Scheme 300

Scheme 300: INSTALLATION
Scheme 300: INSTALLATION
  1. Check for cracks or loose connections.
  2. Inspect that no foreign objects are mixed in the air intake chamber.

REMOVAL

Remove the clip which secures the air intake duct, and remove the air intake duct.

Scheme 301

Scheme 301: REMOVAL
Scheme 301: REMOVAL

Install in the reverse order of removal.

  1. Check for cracks or loose connections.
  2. Check that no foreign matter is mixed in air intake duct.

The resonator chamber and air cleaner case are integrated into one unit; therefore, refer to "AIR CLEANER CASE" for the removal procedure. REMOVAL, Air Cleaner Case.>

The resonator chamber and air cleaner case are integrated into one unit; therefore, refer to "AIR CLEANER CASE" for installation procedure. INSTALLATION, Air Cleaner Case.>

Check for cracks or loose connections.

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