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Home >> Subaru >> 2004 >> Baja Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Exhaust >> Exhaust (H4SO U5 (PZEV)) >> Front Exhaust Pipe >> Removal

Front Exhaust Pipe: Removal

  1. Disconnect ground cable from battery.
  2. Disconnect front oxygen (A/F) sensor connector.
    • LH side
      Fig 1: Disconnecting Front Oxygen (A/F) Sensor Connector
      G00852000Courtesy of SUBARU OF AMERICA, INC.
    • RH side
    Fig 2: Disconnecting Front Oxygen (A/F) Sensor Connector (RH Side)
    G00852001Courtesy of SUBARU OF AMERICA, INC.
  3. Disconnect front oxygen sensor connector.
    • LH side
      Fig 3: Disconnecting Front Oxygen Sensor Connector (LH Side)
      G00852002Courtesy of SUBARU OF AMERICA, INC.
    • RH side
    Fig 4: Disconnecting Front Oxygen Sensor Connector (RH Side)
    G00852003Courtesy of SUBARU OF AMERICA, INC.
  4. Lift-up the vehicle.
  5. Remove under cover.
  6. Disconnect rear oxygen sensor connector.
    Fig 5: Disconnecting Rear Oxygen Sensor Connector
    G00852004Courtesy of SUBARU OF AMERICA, INC.
  7. Separate front exhaust pipe assembly from rear exhaust pipe.
    WARNING: Be careful, exhaust pipe is hot. 
    Fig 6: Separating Front Exhaust Pipe Assembly From Rear Exhaust Pipe
    G00852005Courtesy of SUBARU OF AMERICA, INC.
  8. Remove nuts which hold front exhaust pipe onto cylinder heads.
    CAUTION: Be careful not to pull down front exhaust pipe assembly. 
    Fig 7: Removing Nuts Which Hold Front Exhaust Pipe Onto Cylinder Heads
    G00852006Courtesy of SUBARU OF AMERICA, INC.
  9. Remove bolt which secures front exhaust pipe assembly to hanger bracket.
    Fig 8: Removing Bolt Which Secures Front Exhaust Pipe Assembly To Hanger Bracket
    G00852007Courtesy of SUBARU OF AMERICA, INC.
  10. Remove front exhaust pipe from the vehicle.
    CAUTION:
    • Disconnect front oxygen (A/F) sensor, front oxygen sensor and rear oxygen sensor harness from bracket. 
    • Be careful not to let front exhaust pipe assembly fall off when removing as it is quite heavy. 
    • After removing front exhaust assembly, do not apply excessive pulling force on rear exhaust pipe. 
  11. Separate front exhaust pipe (RH) from front exhaust pipe assembly.
    Fig 9: Separating Front Exhaust Pipe (RH) From Front Exhaust Pipe Assembly
    G00852008Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect front oxygen (A/F) sensor, front oxygen sensor and rear oxygen sensor. Refer to REMOVAL , Front Oxygen (A/F) Sensor. Refer to REMOVAL , Front Oxygen Sensor and REMOVAL , Rear Oxygen Sensor.