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Home >> Subaru >> 2008 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H4DOTC) >> Intake Manifold >> Disassembly

Intake Manifold: Disassembly

  1. Remove the engine ground terminal from the fuel pipe protector LH and remove the fuel pipe protector LH from the intake manifold.
    Fig 1: Locating Fuel Pipe Protector LH And Intake Manifold
    G05340106Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the fuel pipe protector RH from the intake manifold.
    Fig 2: Locating Fuel Pipe Protector RH And Intake Manifold
    G05340107Courtesy of SUBARU OF AMERICA, INC.
  3. Disconnect the evaporation hose and the connector from the purge control solenoid valve 1, and remove the purge control solenoid valve 1 from the intake manifold.
    Fig 3: Identifying Purge Control Solenoid Valve And Intake Manifold
    G05340108Courtesy of SUBARU OF AMERICA, INC.
  4. Disconnect the filter assembly.
    Fig 4: Identifying Filter Assembly
    G05340109Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the solenoid valve bracket assembly from the intake manifold, and disconnect the connector from the wastegate control solenoid valve, manifold absolute pressure sensor and purge control solenoid valve 2.
    Fig 5: Identifying Manifold Absolute Pressure Sensor And Purge Control Solenoid Valve
    G05017763Courtesy of SUBARU OF AMERICA, INC.
  6. Disconnect the evaporation hose of the purge control solenoid valve 2 from the intake duct and fuel pipe assembly.
  7. Disconnect the connectors from the throttle position sensor.
    Fig 6: Identifying Throttle Position Sensor
    G05017732Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the throttle body from the intake manifold.
    Fig 7: Identifying Throttle Body To Intake Manifold
    G05017734Courtesy of SUBARU OF AMERICA, INC.
  9. Disconnect the connector from the fuel injector and the tumble generator valve assembly.
    Fig 8: Locating Tumble Generator Valve Assembly
    G05340113Courtesy of SUBARU OF AMERICA, INC.
  10. Remove the PCV pipe (A), harness assembly (B) and intake duct (C) from the intake manifold.
    Fig 9: Identifying PCV Pipe, Harness Assembly And Intake Duct
    G05340114Courtesy of SUBARU OF AMERICA, INC.
  11. Remove the bolt which secures the fuel injector pipe LH onto the front side of intake manifold, and disconnect the pressure regulator vacuum hose from the intake manifold.
    Fig 10: Identifying Fuel Injector Pipe LH And Intake Manifold
    G05340115Courtesy of SUBARU OF AMERICA, INC.
  12. Remove the bolt which holds fuel injector pipe onto intake manifold.
    • RH side
    Fig 11: Identifying Fuel Injector Pipe Onto Intake Manifold (RH Side)
    G05340116Courtesy of SUBARU OF AMERICA, INC.
    • LH side
    Fig 12: Identifying Fuel Injector Pipe Onto Intake Manifold (LH Side)
    G05340117Courtesy of SUBARU OF AMERICA, INC.
  13. Remove the fuel injector.
    • RH side
    Fig 13: Identifying Fuel Injector (RH Side)
    G05340118Courtesy of SUBARU OF AMERICA, INC.
    • LH side
      Fig 14: Identifying Fuel Injector (LH Side)
      G05340119Courtesy of SUBARU OF AMERICA, INC.
  14. Remove the bolt which holds fuel injector pipe onto intake manifold.
    Fig 15: Identifying Fuel Injector Pipe And Intake Manifold
    G05340120Courtesy of SUBARU OF AMERICA, INC.
  15. Remove the bolt which secures fuel injector pipe RH onto the lower side of the intake manifold.
    Fig 16: Locating Fuel Injector Pipe RH And Lower Side Of Intake Manifold
    G05340121Courtesy of SUBARU OF AMERICA, INC.
  16. Loosen the clamp which holds the fuel hose to the fuel injector pipe, and then disconnect the fuel hose from pipe.
    Fig 17: Identifying Fuel Injector Pipe, Fuel Hose And Pipe
    G05340122Courtesy of SUBARU OF AMERICA, INC.
  17. Remove the fuel injector pipe.
  18. Remove the tumble generator valve assembly from the intake manifold.
Fig 18: Locating Tumble Generator Valve Assembly And Intake Manifold
G05340123Courtesy of SUBARU OF AMERICA, INC.
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