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Home >> Subaru >> 2011 >> Outback Premium, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection Fuel Systems (H4SO) >> Intake Manifold >> Removal >> Multi-Function Duct Assembly
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Multi-Function Duct Assembly

  1. Release the fuel pressure. Refer to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel.
  2. Disconnect the ground cable from battery.
    Fig 1: Disconnecting Ground Cable From Battery
    G07909633Courtesy of SUBARU OF AMERICA, INC.
  3. Open the fuel filler lid and remove the fuel filler cap.
  4. Lift up the vehicle.
  5. Remove the under cover. Refer to FRONT UNDER COVER .
  6. Drain approximately 3.0 l  (3.2 US qt, 2.6 Imp qt) of coolant. Refer to ENGINE COOLANT .
  7. Lower the vehicle.
  8. Remove the intake manifold. Refer to INTAKE MANIFOLD , REMOVAL, Intake Manifold.
  9. Remove the bolt, and disconnect the bulkhead harness connector from the engine harness connector and rear engine hanger.
    Fig 2: Locating Bulkhead Harness Connector Bolt
    G05953679Courtesy of SUBARU OF AMERICA, INC.
  10. Slide the engine harness connector in the direction of the arrow and remove it from the rear engine hanger.
    Fig 3: Sliding Engine Harness Connector
    G07909635Courtesy of SUBARU OF AMERICA, INC.
  11. Disconnect the connector from the knock sensor.
    Fig 4: Locating Knock Sensor Connector
    G07909636Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect the water hose (A) and EGR pipe (B) from the LH side of multi-function duct assembly.
    Fig 5: Identifying Water Hose And EGR Pipe
    G06648263Courtesy of SUBARU OF AMERICA, INC.
  13. Disconnect the PCV hose (A) and water hose (B) from the RH side of multi-function duct assembly.
    Fig 6: Identifying PCV Hose And Water Hose
    G06648264Courtesy of SUBARU OF AMERICA, INC.
  14. Disconnect the connectors from the engine coolant temperature sensor (A), oil pressure switch (B) and crankshaft position sensor (C).
    Fig 7: Identifying Engine Coolant Temperature Sensor, Oil Pressure Switch And Crankshaft Position Sensor Connectors
    G06648265Courtesy of SUBARU OF AMERICA, INC.
  15. Disconnect the connectors from front oxygen (A/F) sensor (A) and rear oxygen sensor (B).
  16. Disconnect the connector (C) from the ignition coil of #1 cylinder.
  17. Disconnect the connectors from oil switching solenoid valve RH (D), oil temperature sensor RH (E) and variable valve lift diagnosis switch (F), and remove the bolt to detach the ground terminal (G).
    Fig 8: Identifying Connectors And Ground Terminal Bolt
    G06648266Courtesy of SUBARU OF AMERICA, INC.
  18. Slide the front oxygen (A/F) sensor connector and rear oxygen sensor connector in the direction of the arrow and remove them from the bracket.
    Fig 9: Sliding Front Oxygen (A/F) Sensor Connector And Rear Oxygen Sensor Connector
    G06648267Courtesy of SUBARU OF AMERICA, INC.
  19. Disconnect the connector from the ignition coil of #4 cylinder.
  20. Disconnect the connectors from the oil switching solenoid valve LH (A) and camshaft position sensor LH (B).
    Fig 10: Identifying Connectors Of Oil Switching Solenoid Valve LH And Camshaft Position Sensor LH
    G06648268Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the PCV pipe, multi-function duct assembly and engine harness as a single unit from the engine.
    Fig 11: Identifying PCV Pipe, Multi-Function Duct Assembly And Engine Harness
    G06648269Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the bolt (A) securing the multi-function duct assembly to the PCV pipe, and remove the multi-function duct assembly.
  23. Remove the clip (B) securing the engine harness to the PCV pipe, and remove the engine harness.
Fig 12: Identifying Multi-Function Duct Assembly Bolts And Engine Harness Clips
G06648270Courtesy of SUBARU OF AMERICA, INC.
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