2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

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: Identifying Preheater Hose And Connector
    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: Identifying Brake Booster Vacuum Hose Clips And Sections
    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 With Clamp
    G09479601Courtesy of SUBARU OF AMERICA, INC.
  17. Disconnect two vacuum hoses from the canister pipe.
    Fig 6: Locating Vacuum Hoses Of Canister Pipe
    G09479602Courtesy of SUBARU OF AMERICA, INC.
  18. Disconnect the connector from the purge control solenoid valve.
    Fig 7: Locating Purge Control Solenoid Valve Connectors
    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: Identifying Tumble Generator Valve RH And LH Connector
    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.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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