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Home >> Subaru >> 2005 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) -- H4DOTC >> Intake Manifold >> Assembly
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Intake Manifold: Assembly

NOTE: Replace the gasket with a new one.
  1. Install the tumble generator valve assembly to the intake manifold.

    Tightening torque: 

    8.25 N.m (0.84 kgf-m, 6.1 ft-lb) 

    Fig 1: Installing Tumble Generator Valve Assembly To Intake Manifold
    G03816783Courtesy of SUBARU OF AMERICA, INC.
  2. Install the air intake duct to the intake manifold.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 2: Installing Air Intake Duct To Intake Manifold
    G03816784Courtesy of SUBARU OF AMERICA, INC.
  3. Install the fuel pipe assembly and pressure regulator to the intake manifold.

    Tightening torque: 

    4.9 N.m (0.5 kgf-m, 3.6 ft-lb) 

    Fig 3: Installing Fuel Pipe Assembly And Pressure Regulator To Intake Manifold
    G03816785Courtesy of SUBARU OF AMERICA, INC.
  4. Install the fuel injector pipe LH.
  5. Connect the left side fuel hose to injector pipe, and tighten the clamp screw.
    Fig 4: Connecting Left Side Fuel Hose To Injector Pipe
    G03816786Courtesy of SUBARU OF AMERICA, INC.
  6. Install the engine harness to the intake manifold.
  7. Install the harness bracket which holds the engine harness onto intake manifold.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 5: Installing Harness Bracket
    G03816787Courtesy of SUBARU OF AMERICA, INC.
  8. Install the fuel injector.
    Fig 6: Installing Fuel Injector
    G03816788Courtesy of SUBARU OF AMERICA, INC.
  9. Tighten the bolts which install the fuel injector pipe onto intake manifold.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    • LH side
      Fig 7: Tightening Fuel Injector Pipe Onto Intake Manifold Installing Bolt - LH (1 Of 2)
      G03816789Courtesy of SUBARU OF AMERICA, INC.
      Fig 8: Tightening Fuel Injector Pipe Onto Intake Manifold Installing Bolt - LH (2 Of 2)
      G03816790Courtesy of SUBARU OF AMERICA, INC.
    • RH side
      Fig 9: Tightening Fuel Injector Pipe Onto Intake Manifold Installing Bolt - RH (1 Of 2)
      G03816791Courtesy of SUBARU OF AMERICA, INC.
      Fig 10: Tightening Fuel Injector Pipe Onto Intake Manifold Installing Bolt - RH (2 Of 2)
      G03816792Courtesy of SUBARU OF AMERICA, INC.
  10. Tighten the two bolts which install the fuel pipes on the left side of intake manifold.

    Tightening torque: 

    4.9 N.m (0.5 kgf-m, 3.6 ft-lb) 

    Fig 11: Tightening Two Bolts (Installing Fuel Pipes On Left Side Of Intake Manifold)
    G03816793Courtesy of SUBARU OF AMERICA, INC.
  11. Connect the evaporation hoses to the purge valve.
    NOTE: Connect the evaporation hoses as shown in Fig 12 .
    Fig 12: Connecting Evaporation Hoses
    G03816794Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the evaporation hose to the intake manifold.
    Fig 13: Connecting Evaporation Hose To Intake Manifold
    G03816795Courtesy of SUBARU OF AMERICA, INC.
  13. Install the purge control solenoid valve.

    Tightening torque: 

    16 N.m (1.6 kgf-m, 11.8 ft-lb) 

    Fig 14: Installing Purge Control Solenoid Valve
    G03816796Courtesy of SUBARU OF AMERICA, INC.
  14. Connect the hoses to the purge control solenoid valve.
    NOTE: Connect the evaporation hoses as shown in Fig 15 .
    Fig 15: Connecting Evaporation Hoses
    G03816797Courtesy of SUBARU OF AMERICA, INC.
  15. Connect the connector to the purge control solenoid valve.
    Fig 16: Connecting Connector To Purge Control Solenoid Valve
    G03816798Courtesy of SUBARU OF AMERICA, INC.
  16. Connect the connector to the tumble generator valve sensor.
    Fig 17: Connecting Connector To Tumble Generator Valve Sensor
    G03816799Courtesy of SUBARU OF AMERICA, INC.
  17. Connect the connector to the tumble generator valve actuator.
    Fig 18: Connecting Connector To Tumble Generator Valve Actuator
    G03816800Courtesy of SUBARU OF AMERICA, INC.
  18. Connect the connector to the fuel injector.
    Fig 19: Connecting Connector To Fuel Injector
    G03816801Courtesy of SUBARU OF AMERICA, INC.
  19. Install the throttle body to the intake manifold.
    NOTE: Replace the gasket with a new one.

    Tightening torque: 

    22 N.m (2.2 kgf-m, 15.9 ft-lb) 

    Fig 20: Installing Throttle Body To Intake Manifold
    G03816802Courtesy of SUBARU OF AMERICA, INC.
  20. Connect the connector to the throttle position sensor (A), idle air control solenoid valve (B) and manifold absolute pressure sensor (C).
  21. Connect the engine harness to the intake manifold using clips (D).
    Fig 21: Connecting Engine Harness To Intake Manifold Using Clips
    G03816803Courtesy of SUBARU OF AMERICA, INC.
  22. Install the engine ground terminal to the intake manifold.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 22: Installing Engine Ground Terminal To Intake Manifold (1 Of 2)
    G03816804Courtesy of SUBARU OF AMERICA, INC.
    Fig 23: Installing Engine Ground Terminal To Intake Manifold (2 Of 2)
    G03816805Courtesy of SUBARU OF AMERICA, INC.
  23. Install the fuel pipe protector RH.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 24: Installing Fuel Pipe Protector RH
    G03816806Courtesy of SUBARU OF AMERICA, INC.
  24. Install the fuel pipe protector LH.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 25: Installing Fuel Pipe Protector LH
    G03816807Courtesy of SUBARU OF AMERICA, INC.