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Home >> Subaru >> 2012 >> Impreza WRX STi Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (WRX-STI) >> Intake Manifold >> Disassembly

Intake Manifold: Disassembly

  1. Remove clamp (A) holding the fuel pipe protector RH to the engine harness, and remove the fuel pipe protector RH.
    Fig 1: Locating Fuel Pipe Protector Clamp
    G07704375Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the fuel pipe protector LH.
    Fig 2: Locating Fuel Pipe Protector Mounting Bolts
    G07704376Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the connector from the intake duct.
    Fig 3: Locating Intake Duct Connector
    G07704377Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the connector from the PCV hose assembly.
    Fig 4: Identifying PCV Hose Assembly Connector
    G00523596Courtesy of SUBARU OF AMERICA, INC.
  5. Remove purge control solenoid valve 1 (A) and purge control solenoid valve 2 (B).
    Fig 5: Locating Purge Control Solenoid Valve Mounting Bolts
    G00523597Courtesy of SUBARU OF AMERICA, INC.
  6. Disconnect the connector (A) from the wastegate control solenoid valve, and disconnect the vacuum hose (B) from the intake duct.
    Fig 6: Identifying Wastegate Control Solenoid Valve Connector
    G00523598Courtesy of SUBARU OF AMERICA, INC.
  7. Remove the solenoid valve bracket together with the wastegate control solenoid valve.
    Fig 7: Locating Solenoid Valve Bracket Mounting Bolt
    G00523599Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the engine ground terminals from the intake manifold.
    Fig 8: Locating Engine Ground Terminals Mounting Bolt
    G07704380Courtesy of SUBARU OF AMERICA, INC.
  9. Disconnect the connector (A) from the throttle position sensor, and the connector (B) from the manifold pressure sensor.
    Fig 9: Identifying Throttle Position Sensor And Manifold Pressure Sensor Connector
    G07704381Courtesy of SUBARU OF AMERICA, INC.
  10. Remove clip (A) holding the engine harness and vacuum hose, clip (B) holding the engine harness to the engine harness stay, and the bolt holding the engine harness to the intake manifold.
    Fig 10: Identifying Engine Harness And Vacuum Hose Clip
    G07704382Courtesy of SUBARU OF AMERICA, INC.
  11. Remove the throttle body from the intake manifold.
    Fig 11: Locating Intake Manifold And Mounting Bolts
    G07704383Courtesy of SUBARU OF AMERICA, INC.
  12. Remove the harness band (A) which holds the engine harness to the fuel injector pipe.
    • RH side
      Fig 12: Identifying Engine Harness Band RH
      G07704384Courtesy of SUBARU OF AMERICA, INC.
    • LH side
      Fig 13: Identifying Engine Harness Band LH
      G07704385Courtesy of SUBARU OF AMERICA, INC.
  13. Disconnect the connector from fuel injector.
    Fig 14: Locating Fuel Injector Connector
    G07704386Courtesy of SUBARU OF AMERICA, INC.
  14. Disconnect the connector from the tumble generator valve assembly.
    Fig 15: Locating Tumble Generator Valve Assembly Connector
    G07704387Courtesy of SUBARU OF AMERICA, INC.
  15. Remove the bolts which hold fuel injector pipe.
    • RH side
      Fig 16: Locating Fuel Injector Pipe Mounting Bolts
      G07704388Courtesy of SUBARU OF AMERICA, INC.
    • LH side
      Fig 17: Locating Fuel Injector Pipe Mounting Bolts (1 Of 2)
      G07704389Courtesy of SUBARU OF AMERICA, INC.
      Fig 18: Locating Fuel Injector Pipe Mounting Bolts (2 Of 2)
      G07704390Courtesy of SUBARU OF AMERICA, INC.
  16. Remove the fuel injector.
    Fig 19: Removing Fuel Injector
    G07704391Courtesy of SUBARU OF AMERICA, INC.
  17. Remove the harness brackets holding the engine harness to the intake manifold, and remove the engine harness.
    Fig 20: Locating Engine Harness Bracket Bolts
    G07704392Courtesy of SUBARU OF AMERICA, INC.
  18. Loosen the clamp holding the RH side fuel hose to the fuel injector pipe RH, and remove the fuel injector pipe RH.
    Fig 21: Locating Side Fuel Hose Clamp
    G07704393Courtesy of SUBARU OF AMERICA, INC.
  19. Loosen the clamp holding the LH side fuel hose to the fuel injector pipe LH, and remove the fuel injector pipe LH.
    Fig 22: Locating Side Fuel Hose Clamp
    G07704394Courtesy of SUBARU OF AMERICA, INC.
  20. Remove the bolts holding the fuel pipe assembly to the intake manifold, and remove the fuel pipe assembly.
    Fig 23: Locating Fuel Pipe Assembly Mounting Bolts
    G07704402Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the intake duct from intake manifold.
    Fig 24: Locating Intake Duct
    G00523600Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the tumble generator valve assembly from the intake manifold.
    Fig 25: Locating Tumble Generator Valve Assembly Mounting Bolts
    G07704397Courtesy of SUBARU OF AMERICA, INC.
  23. Remove the nipple from the intake manifold.
    Fig 26: Identifying Intake Manifold Nipple
    G07704398Courtesy of SUBARU OF AMERICA, INC.
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