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Home >> Subaru >> 2006 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) (STI) >> Intake Manifold >> Removal
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Intake Manifold: Removal

  1. Release the fuel pressure. < Ref. to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel. >
  2. Open the fuel filler flap lid and remove the fuel filler cap.
  3. Disconnect the ground cable from battery.
  4. Lift up the vehicle.
  5. Remove the under cover.
  6. Drain the engine coolant about 3.0 (3.2 US qt, 2.6 Imp qt).
    Fig 1: Locating Fuel Filler Cap
    G04998256
  7. Remove the air cleaner upper cover and air intake boot. < Ref. to REMOVAL , Air Cleaner Case. >
  8. Remove the air cleaner element.
  9. Remove the intercooler. < Ref. to REMOVAL , Intercooler. >
  10. Remove the coolant filler tank. < Ref. to REMOVAL , Coolant Filler Tank. >
  11. Remove the power steering pump.
    1. Remove the front side V-belt. < Ref. to REMOVAL , V-belt. >
    2. Disconnect the power steering switch connector.
      Fig 2: Locating Power Steering Switch Connector
      G04998257
    3. Remove the bolts which secure the power steering pipe brackets to the intake manifold.
      NOTE: Do not disconnect the power steering hose.
      Fig 3: Identifying Power Steering Pipe Brackets
      G04999295
    4. Remove the bolts which secure the power steering pump bracket.
      Fig 4: Locating Power Steering Pump Bracket Bolts
      G04998259
    5. Remove the power steering tank from the bracket by pulling it upward.
      Fig 5: Identifying Power Steering Tank
      G04997330
    6. Place the power steering pump on the right side wheel apron.
      Fig 6: Locating Power Steering Pump On Right Side Wheel Apron
      G04997331
  12. Disconnect the emission hose (A) and connector (B) from the PCV hose assembly.
    Fig 7: Identifying Emission Hose And Connector
    G04998262
  13. Disconnect the engine coolant hoses from the throttle body.
    Fig 8: Identifying Engine Coolant Hoses
    G04998254
  14. Disconnect the brake booster hose.
    Fig 9: Identifying Brake Booster Hose
    G04998264
  15. Disconnect the pressure hose from the intake duct.
    Fig 10: Identifying Pressure Hose
    G04998265
  16. Disconnect the engine harness connectors from the bulkhead harness connectors.
    Fig 11: Locating Engine Harness Connectors
    G04999303
  17. Disconnect the engine harness connector from front harness connector.
    Fig 12: Locating Engine Harness Connector
    G04998267
  18. Disconnect the connectors from the engine coolant temperature sensor (A), oil pressure switch (B) and crankshaft position sensor (C).
    Fig 13: Locating Coolant Temperature Sensor And Oil Pressure Switch
    G04998268
  19. Disconnect the knock sensor connector.
    Fig 14: Locating Knock Sensor Connector
    G04998280
  20. Disconnect the connector from the camshaft position sensor.
    Fig 15: Identifying Connector For Camshaft Position Sensor
    G04999307
  21. Disconnect the connector from the ignition coil and ignitor assembly.
    • RH side
      Fig 16: Identifying Connector For Ignition Coil And Ignitor Assembly
      G04998271
    • LH side
      Fig 17: Identifying Connector For Ignition Coil And Ignitor Assembly
      G04998272
  22. Disconnect the engine harness fixed by clip (A) from the rocker cover.
    • RH side
      Fig 18: Identifying Engine Harness Clip
      G04998273
    • LH side
      Fig 19: Identifying Engine Harness Clip
      G04998274
  23. Using ST, disconnect fuel hoses from fuel pipes. < Ref. to REMOVAL , Fuel Delivery, Return and Evaporation Lines. >
    CAUTION:
    • Be careful not to spill fuel.
    • Catch fuel from hoses using a container or cloth.

    ST 42099AE000 CONNECTOR REMOVER

    Fig 20: Disconnecting Fuel Hoses From Fuel Pipes Using ST 42099AE000 Connector Remover
    G04999312
  24. Remove the bolts which secure the intake manifold to the cylinder heads.
    Fig 21: Locating Intake Manifold To Cylinder Heads Bolts
    G04999313
  25. Remove the intake manifold.