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Home >> Subaru >> 2017 >> WRX Base >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System (2.0L) >> Front Exhaust Pipe >> Removal

Front Exhaust Pipe: Removal

CAUTION: Vehicle components are extremely hot after driving. Be wary of receiving burns from heated parts.
  1. Remove the collector cover. <Ref. to REMOVAL , Collector Cover.>
  2. Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Note.>
  3. Remove the air intake duct. <Ref. to REMOVAL , Air Intake Duct.>
  4. Remove the radiator sub fan and fan motor. <Ref. to REMOVAL , Radiator Sub Fan and Fan Motor.>
  5. Drain engine coolant. <Ref. to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.>
  6. Lower the vehicle.
  7. Remove the bolts which secure the water pump pulley cover to the turbocharger stay.
    Fig 1: Locating Water Pump Pulley Cover Bolts
    G09480657Courtesy of SUBARU OF AMERICA, INC.
  8. Disconnect the engine coolant hose from the water pipe assembly.
    Fig 2: Locating Engine Coolant Hose
    G11267175Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the bolts which secure the intake duct No. 2 to the turbocharger.
    Fig 3: Locating Intake Duct No. 2 To Turbocharger Bolts
    G11266618Courtesy of SUBARU OF AMERICA, INC.
  10. Lift up the vehicle.
  11. Disconnect the connector on the front oxygen (A/F) sensor from the engine harness, and remove the clip (A) which secures the front oxygen (A/F) sensor harness to the water pump pulley cover.
    Fig 4: Locating Front Oxygen (A/F) Sensor Connector
    G09480660Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect the connector on the rear oxygen sensor from the engine harness, and disconnect the ground cable from the exhaust pipe cover.
    Fig 5: Locating Rear Oxygen Sensor Connector
    G10267114Courtesy of SUBARU OF AMERICA, INC.
  13. Disconnect the union screw pipe assembly from the oil pipe assembly, and disconnect the engine coolant hose from the water pipe RH.
    CAUTION: In order to prevent damaging the oil pipe assembly, fix the section (a) shown in the figure when loosing the flare nut on the union screw pipe assembly, and avoid the part from rotating together while loosening the nut.
    Fig 6: Locating Union Screw Pipe Assembly Flare Nut
    G11267179Courtesy of SUBARU OF AMERICA, INC.
  14. Disconnect the vacuum control hose from the wastegate control solenoid valve.
    Fig 7: Locating Vacuum Control Hose
    G11267180Courtesy of SUBARU OF AMERICA, INC.
  15. Remove the bolts which secure the intake duct No. 1 to the turbocharger.
    Fig 8: Locating Intake Duct No. 1 Bolts
    G09480663Courtesy of SUBARU OF AMERICA, INC.
  16. Remove the nuts which secure the center exhaust pipe (rear) to the center exhaust pipe (front).
    Fig 9: Locating Center Exhaust Pipe (Rear) Nuts
    G10267117Courtesy of SUBARU OF AMERICA, INC.
  17. Remove the bolts, springs, and nuts which secure the rear exhaust pipe to the center exhaust pipe (rear).
    Fig 10: Locating Center Exhaust Pipe (Rear) Bolts
    G09480665Courtesy of SUBARU OF AMERICA, INC.
  18. Remove the bolt which holds center exhaust pipe (rear) to the hanger bracket, and remove the center exhaust pipe (rear).
    NOTE: For CVT model, removing the exhaust pipe bracket from the center exhaust pipe (rear) will adversely affect the positioning accuracy. Therefore, do not remove the bolts in section (a) shown in the figure.
    • CVT model
      Fig 11: Locating Hanger Bracket Bolts (CVT Model)
      G10267119Courtesy of SUBARU OF AMERICA, INC.
    • MT model
    Fig 12: Locating Hanger Bracket Bolts (MT Model)
    G10267120Courtesy of SUBARU OF AMERICA, INC.
  19. Remove the oil catch tank. <Ref. to REMOVAL , Oil Catch Tank.>
    CAUTION: This procedure is required to prevent oil from remaining in the compressor and turbine areas if the residual oil inside the oil catch tank back flows.
  20. Remove the bolts which secure the turbocharger stay.
    Fig 13: Locating Turbocharger Stay Bolts
    G09480669Courtesy of SUBARU OF AMERICA, INC.
  21. While holding the front exhaust pipe with transmission jack, remove the nuts which hold the front exhaust pipe to the cylinder head exhaust port, and remove the front exhaust pipe.
    Fig 14: Locating Front Exhaust Pipe Bolts
    G09480670Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the water pump pulley cover and exhaust pipe stay from the engine and turbocharger stay.
    Fig 15: Locating Exhaust Pipe Stay Bolts
    G09480671Courtesy of SUBARU OF AMERICA, INC.
  23. Remove the turbocharger stay from the engine.
    Fig 16: Locating Engine Turbocharger Stay Bolts
    G09480672Courtesy of SUBARU OF AMERICA, INC.
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