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Home >> Subaru >> 2021 >> 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. Refer to INTAKE (INDUCTION) (W/O STI)>COLLECTOR COVER>REMOVAL .
  2. Disconnect the ground terminal from battery sensor. Refer to NOTE>NOTE>BATTERY .
  3. Remove the air intake duct. Refer to INTAKE (INDUCTION) (W/O STI)>AIR INTAKE DUCT>REMOVAL .
  4. Remove the radiator sub fan and fan motor. Refer to COOLING(W/O STI)>RADIATOR SUB FAN AND FAN MOTOR>REMOVAL .
  5. Drain engine coolant. Refer to COOLING(W/O STI)>ENGINE COOLANT>REPLACEMENT>DRAINING OF ENGINE COOLANT .
  6. Lower the vehicle.
  7. Remove the bolts which secure the water pump pulley cover to the turbocharger stay.
    G09480657Courtesy of SUBARU OF AMERICA, INC.
  8. Disconnect the engine coolant hose from the water pipe assembly.
    G11267175Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the bolts which secure the intake duct No. 2 to the turbocharger.
    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 wiring harness, and remove the clip (A) which secures the front oxygen (A/F) sensor harness to the water pump pulley cover.
    G09480660Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect the connector on the rear oxygen sensor from the engine wiring harness, and disconnect the ground cable from the exhaust pipe cover.
    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.
    G12442756Courtesy of SUBARU OF AMERICA, INC.
  14. Disconnect the vacuum control hose from the wastegate control solenoid valve. (Except for Canada)
    G11267180Courtesy of SUBARU OF AMERICA, INC.
  15. Disconnect the vacuum control hose from the wastegate control solenoid valve, and disconnect the engine coolant hose from the intake duct No. 1. (For Canada)
    G12442758Courtesy of SUBARU OF AMERICA, INC.
  16. Remove the bolts which secure the intake duct No. 1 to the turbocharger.
    G09480663Courtesy of SUBARU OF AMERICA, INC.
  17. Remove the nuts which secure the center exhaust pipe (rear) to the center exhaust pipe (front).
    G10267117Courtesy of SUBARU OF AMERICA, INC.
  18. Remove the bolts, springs, and nuts which secure the rear exhaust pipe to the center exhaust pipe (rear).
    G09480665Courtesy of SUBARU OF AMERICA, INC.
  19. 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
      G10267119Courtesy of SUBARU OF AMERICA, INC.
    • MT model
    G10267120Courtesy of SUBARU OF AMERICA, INC.
  20. Remove the oil catch tank. Refer to INTAKE (INDUCTION) (W/O STI)>OIL CATCH TANK>REMOVAL .
    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.
  21. Remove the bolts which secure the turbocharger stay.
    G09480669Courtesy of SUBARU OF AMERICA, INC.
  22. 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.
    G09480670Courtesy of SUBARU OF AMERICA, INC.
  23. Remove the water pump pulley cover and exhaust pipe stay from the engine and turbocharger stay.
    G09480671Courtesy of SUBARU OF AMERICA, INC.
  24. Remove the turbocharger stay from the engine.
G09480672Courtesy of SUBARU OF AMERICA, INC.
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