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Home >> Subaru >> 2017 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.5L) >> Intake Manifold >> Disassembly
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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 RH Clamp
    G08538680Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the fuel pipe protector LH.
    Fig 2: Locating Fuel Pipe Protector LH Bolts
    G08538681Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the connector from the intake duct.
    Fig 3: Removing Connector From Intake Duct
    G08538682Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the connector from the PCV hose assembly.
    Fig 4: Locating PCV Hose Assembly Connector
    G08538683Courtesy 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 Valves
    G08538684Courtesy 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: Locating Wastegate Control Solenoid Valve Connector
    G11571504Courtesy of SUBARU OF AMERICA, INC.
  7. Remove the solenoid valve bracket together with the wastegate control solenoid valve.
    Fig 7: Locating Solenoid Valve Bracket Bolts
    G11571505Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the engine ground terminals from the intake manifold.
    Fig 8: Locating Engine Ground Terminal
    G06344595Courtesy 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: Locating Throttle Position Sensor Connector
    G08538688Courtesy 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: Locating Engine Harness And Vacuum Hose Clip
    G06344597Courtesy of SUBARU OF AMERICA, INC.
  11. Remove the throttle body from the intake manifold.
    Fig 11: Locating Throttle Body Bolts
    G08538690Courtesy 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: Locating Fuel Injector Pipe Harness Band - RH Side
      G08538691Courtesy of SUBARU OF AMERICA, INC.
    • LH side
      Fig 13: Locating Fuel Injector Pipe Harness Band - LH Side
      G08538692Courtesy of SUBARU OF AMERICA, INC.
  13. Disconnect the connector from fuel injector.
    Fig 14: Locating Fuel Injector Connector
    G06344601Courtesy of SUBARU OF AMERICA, INC.
  14. Disconnect the connector from the tumble generator valve assembly.
    Fig 15: Locating Connector Of Tumble Generator Valve Assembly
    G08538694Courtesy of SUBARU OF AMERICA, INC.
  15. Remove the bolts which hold fuel injector pipe.
    • RH side
      Fig 16: Locating Fuel Injector Pipe Bolts (RH Side)
      G06344603Courtesy of SUBARU OF AMERICA, INC.
    • LH side
    Fig 17: Locating Fuel Injector Pipe Bolts (LH Side)
    G06344604Courtesy of SUBARU OF AMERICA, INC.
    Fig 18: Fuel Injector Pipe Bolts (LH Side)
    G06344605Courtesy of SUBARU OF AMERICA, INC.
  16. Remove the fuel injector.
    Fig 19: Removing Fuel Injector
    G06344606Courtesy 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 Brackets
    G06344607Courtesy 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 Clamp Holding RH Side Fuel Hose Connector
    G08538700Courtesy 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 Clamp Holding LH Side Fuel Hose
    G08538701Courtesy 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 Bolts
    G05333518Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the intake duct from intake manifold.
    Fig 24: Removing Intake Duct From Intake Manifold
    G11571522Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the tumble generator valve assembly from the intake manifold.
    Fig 25: Locating Tumble Generator Valve Assembly Bolts
    G06344612Courtesy of SUBARU OF AMERICA, INC.
  23. Remove the nipple from the intake manifold.
    Fig 26: Removing Nipple From Intake Manifold
    G08538705Courtesy of SUBARU OF AMERICA, INC.
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