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Home >> Subaru >> 2017 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.0L) >> Intake Manifold >> Removal
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Intake Manifold: Removal

  1. Remove the collector cover. <Ref. to REMOVAL , Collector Cover.>
  2. Release the fuel pressure. <Ref. to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel.>
  3. Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Note.>
  4. Open the fuel filler lid and remove the fuel filler cap.
    NOTE: This operation is required to release the inner pressure of the fuel tank.
  5. Lift up the vehicle.
  6. Remove the under cover. <Ref. to REMOVAL , Front Under Cover.>
  7. Drain approximately 3.0 L (3.2 US qt, 2.6 Imp qt) of coolant. <Ref. to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.>
  8. Remove the intercooler. <Ref. to REMOVAL , Intercooler.>
  9. Remove the intake duct No. 2. <Ref. to INTAKE DUCT NO. 2 , REMOVAL, Intake Duct.>
  10. Remove the intake duct No. 3. <Ref. to INTAKE DUCT NO. 3 , REMOVAL, Intake Duct.>
  11. Disconnect the PCV hose from the PCV valve.
    Fig 1: Locating PCV Hose Clamp
    G09480039Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect the connector (A) from the throttle body, and disconnect the preheater hose (B) from the throttle body.
    Fig 2: Throttle Position Sensor Connector And Preheater Hose
    G10266071Courtesy of SUBARU OF AMERICA, INC.
  13. Disconnect sections (A) and (B) of the brake booster vacuum hose from the brake vacuum pump and intake manifold, and remove the brake booster vacuum hose from the clip (C).
  14. Remove the brake booster vacuum hose from the clip (D), and place the brake booster vacuum hose aside so that it does not interfere with the work.
    Fig 3: Brake Booster Vacuum Hose Sections And Clips
    G10266664Courtesy of SUBARU OF AMERICA, INC.
  15. Remove the clips securing the PCV pipe and generator cord to the intake manifold.
    Fig 4: Locating PCV Pipe And Generator Cord Clips
    G10266077Courtesy of SUBARU OF AMERICA, INC.
  16. Disconnect the vacuum control hose and vacuum hose from the vacuum pipe assembly.
    Fig 5: Locating Vacuum Control Hose And Vacuum Hose Clamp
    G09479601Courtesy of SUBARU OF AMERICA, INC.
  17. Disconnect two vacuum hoses from the canister pipe.
    Fig 6: Locating Vacuum Hoses
    G09479602Courtesy of SUBARU OF AMERICA, INC.
  18. Disconnect the connector from the purge control solenoid valve.
    Fig 7: Locating Purge Control Solenoid Valve Connector
    G09479603Courtesy of SUBARU OF AMERICA, INC.
  19. Disconnect the connector from the manifold absolute pressure and intake air temperature sensor.
    Fig 8: Locating Manifold Absolute Pressure And Intake Air Temperature Sensor Connector
    G09479604Courtesy of SUBARU OF AMERICA, INC.
  20. Disconnect the connector (A) from the tumble generator valve RH.
  21. Disconnect the connector (B) from the tumble generator valve LH, and remove the bolt securing the fuel pipe protector to the intake manifold.
    Fig 9: Tumble Generator Valve LH And RH Connector With Bolt
    G10266082Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the engine harness clip from the intake manifold.
    Fig 10: Locating Engine Harness Clip Of Intake Manifold
    G10266083Courtesy of SUBARU OF AMERICA, INC.
  23. Remove the bolt securing the EGR pipe to the EGR valve.
    Fig 11: Locating EGR Pipe Bolts
    G09479607Courtesy of SUBARU OF AMERICA, INC.
  24. Disconnect the fuel delivery tube and evaporation hose.
    CAUTION:
    • Be careful not to spill fuel.
    • Catch the fuel from the tubes using a container or cloth.
    1. Disconnect the quick connector on the fuel delivery tube from the fuel pipe assembly, and remove the clip (A) securing the fuel delivery tube.
      NOTE: Disconnect the quick connector as shown in the figure.
      Fig 12: Disconnecting Quick Connector On Fuel Delivery Tube From Fuel Pipe Assembly
      G11574489Courtesy of SUBARU OF AMERICA, INC.
      Fig 13: Fuel Delivery Tube Quick Connector And Clip
      G10266100Courtesy of SUBARU OF AMERICA, INC.
    2. Disconnect the evaporation hose from the fuel pipe assembly.
    Fig 14: Locating Evaporation Hose Of Fuel Pipe Assembly
    G09479610Courtesy of SUBARU OF AMERICA, INC.
  25. Remove the bolts securing the fuel pipe assembly to the intake manifold.
    Fig 15: Locating Fuel Pipe Assembly Bolt
    G09479611Courtesy of SUBARU OF AMERICA, INC.
  26. Disconnect the fuel delivery pipe (A) and vacuum hose (B), and remove the fuel pipe assembly.
    CAUTION:
    • Be careful not to spill fuel.
    • Catch the fuel from the pipes using a container or cloth.
    NOTE: Disconnect the quick connector as shown in the figure.
    Fig 16: Disconnecting Quick Connector
    G11574493Courtesy of SUBARU OF AMERICA, INC.
    Fig 17: Fuel Delivery Pipe And Vacuum Hose
    G09479613Courtesy of SUBARU OF AMERICA, INC.
  27. Remove the intake manifold from the air intake adapter together with the tumble generator valve assembly.
    Fig 18: Locating Intake Manifold Bolts
    G10266091Courtesy of SUBARU OF AMERICA, INC.
  28. Remove the vacuum hose assembly from the water pipe assembly.
Fig 19: Locating Vacuum Hose Assembly Bolts
G09479615Courtesy of SUBARU OF AMERICA, INC.
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