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Exhaust System (h4so) Subaru Impreza WRX GD/GG рестайлинг

Exhaust 24 illustrations ~837 words

Scheme 1

Scheme 1: COMPONENT
Scheme 1: COMPONENT

CAUTION

  1. Wear working clothing, including a cap, protective goggles, and protective shoes during operation.
  2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
  3. Keep the disassembled parts in order and protect them from dust or dirt.
  4. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly, and replacement.
  5. Be careful not to burn your hands, because each part on the vehicle is hot after running.
  6. Be sure to tighten fasteners including bolts and nuts to the specified torque.
  7. Place shop jacks or safety stands at the specified points.
  8. Before disconnecting electrical connectors of sensors or units, be sure to disconnect the ground cable from battery.

Scheme 2

Scheme 2: REMOVAL
Scheme 2: REMOVAL

Scheme 3

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Scheme 3

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Scheme 7

Scheme 8

Scheme 8
Scheme 8
  1. Disconnect the ground cable from battery.
  2. Disconnect the front oxygen (A/F) sensor connector.
  3. Disconnect the rear oxygen sensor connector.
  4. Lift up the vehicle.
  5. Separate the front and center exhaust pipe assembly from rear exhaust pipe. CAUTION: Be careful, the exhaust pipe is hot.
  6. Remove the under cover.
  7. Remove the nuts which hold the front exhaust pipe onto cylinder heads.
  8. Remove the bolt which installs front and center exhaust pipe assembly to hanger bracket.
  9. Remove the front and center exhaust pipe assembly from vehicle. CAUTION: Be careful not to let the front and center exhaust pipe assembly fall off when removing as it is quite heavy. After removing the front and center exhaust pipe assembly, do not apply excessive pulling force on the rear exhaust pipe.
  10. Separate the front exhaust pipe from center exhaust pipe.
  11. Remove the front oxygen (A/F) sensor and the rear oxygen sensor. See «SENSORS & SWITCHES»(/subaru/impreza-wrx/gdgg-2002-2005/remont/removal-installation/#engine-controls-removal-installation-impreza-outback-sport) .

Scheme 9

Scheme 9: INSTALLATION
Scheme 9: INSTALLATION

Scheme 10

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Scheme 16
Scheme 16
  1. Install the front and rear oxygen sensors. See «SENSORS & SWITCHES»(/subaru/impreza-wrx/gdgg-2002-2005/remont/removal-installation/#engine-controls-removal-installation-impreza-outback-sport) .
  2. Install the front exhaust pipe to center exhaust pipe. NOTE: Replace the gaskets with new ones. Tightening torque: 30 N.m (3.1 kgf-m, 22.4 ft-lb)
  3. Install the front and center exhaust pipe assembly to vehicle.
  4. Temporarily tighten the bolt which installs front and center exhaust pipe assembly to hanger bracket.
  5. Tighten the nuts which hold front exhaust pipe onto cylinder heads. Tightening torque: 30 N.m (3.1 kgf-m, 22.4 ft-lb)
  6. Install the under cover.
  7. Tighten the bolts which installs front and center exhaust pipe assembly to rear exhaust pipe. Tightening torque: 18 N.m (1.8 kgf-m, 13.0 ft-lb)
  8. Tighten the bolt which holds front and center exhaust pipe assembly to hanger bracket. Tightening torque: 35 N.m (3.6 kgf-m, 26.0 ft-lb)
  9. Lower the vehicle.
  10. Connect the rear oxygen sensor connector.
  11. Connect the front oxygen (A/F) sensor connector.
  12. Connect the battery ground cable to battery.

INSPECTION

  1. Make sure there are no exhaust leaks from connections and welds.
  2. Make sure there are no holes or rusting.

REMOVAL

After removing the center and front exhaust pipes as one unit, separate them. Refer to the procedure for removing the front exhaust pipe. See REMOVAL , Front Exhaust Pipe.

INSTALLATION

Install the center exhaust pipe and front exhaust pipe as one unit. Refer to the procedure for installing the front exhaust pipe. See INSTALLATION , Front Exhaust Pipe.

  1. Make sure there are no exhaust leaks from connections and welds.
  2. Make sure there are no holes or rusting.

Scheme 17

Scheme 17: REMOVAL
Scheme 17: REMOVAL

Scheme 18

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Scheme 19

Scheme 19
Scheme 19
  1. Separate the rear exhaust pipe from center exhaust pipe. CAUTION: Be careful, the exhaust pipe is hot.
  2. Separate the rear exhaust pipe from muffler.
  3. Apply a coat of SUBARU CRC to mating area of the cushion rubbers in advance. SUBARU CRC (Part No. 004301003)
  4. Remove the rear exhaust pipe bracket from the cushion rubber.

Scheme 20

Scheme 20: INSTALLATION
Scheme 20: INSTALLATION

Scheme 21

Scheme 21
Scheme 21

Scheme 22

Scheme 22
Scheme 22
  1. Apply a coat of SUBARU CRC to mating area of the cushion rubbers in advance. SUBARU CRC (Part No. 004301003)
  2. Install the rear exhaust pipe bracket to cushion rubber. NOTE: Replace the gaskets with new ones.
  3. Install the rear exhaust pipe to muffler. Tightening torque: 48 N.m (4.9 kgf-m, 35.4 ft-lb) NOTE: Replace the self-locking nuts with new ones.
  4. Install the rear exhaust pipe to center exhaust pipe. Tightening torque: 18 N.m (1.8 kgf-m, 13.0 ft-lb)
  1. Make sure there are no exhaust leaks from connections and welds.
  2. Make sure there are no holes or rusting.
  3. Make sure the cushion rubber is not worn or cracked.

Scheme 23

Scheme 23: REMOVAL
Scheme 23: REMOVAL

Scheme 24

Scheme 24
Scheme 24
  1. Separate the muffler from rear exhaust pipe. CAUTION: Be careful, the exhaust pipe is hot.
  2. Apply a coat of SUBARU CRC to mating area of the cushion rubbers in advance. SUBARU CRC (Part No. 004301003)
  3. Remove the front, right and left cushion rubber, and detach the muffler assembly.
  1. Install in the reverse order of removal. NOTE: Replace the gasket and self-locking nuts with new ones. For tightening torques, see «COMPONENT»(/subaru/impreza-wrx/gdgg-2002-2005/remont/exhaust/#exhaust-system-h4so) , General Description.
  1. Make sure there are no exhaust leaks from connections and welds.
  2. Make sure there are no holes or rusting.
  3. Make sure the cushion rubber is not worn or cracked.

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