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Home >> Subaru >> 2006 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) (STI) >> 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: Locating Tumble Generator Valve Assembly
    G04998320
  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: Locating Air Intake Duct For Intake Manifold
    G04998319
  3. Install the fuel pipe assembly and pressure regulator to the intake manifold.

    Tightening torque: 

    T1: 6.4 N.m (0.65 kgf-m, 4.7 ft-lb) 

    T2: 19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 3: Identifying Fuel Pipe Assembly And Pressure Regulator
    G04999357
  4. Install the fuel injector pipe LH.
  5. Connect the left side fuel hose to injector pipe, and tighten the clamp screw.
    Fig 4: Locating Clamp Screw
    G04999350
  6. Install the fuel injector pipe RH.
  7. Connect the right side fuel hose to injector pipe, and tighten the clamp screw.
    Fig 5: Locating Clamp Screw
    G04998317
  8. Install the engine harness to the intake manifold.
  9. 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 6: Locating Engine Harness For Intake Manifold
    G04999349
  10. 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: Locating Fuel Injector Pipe For LH Side
      G04999345
      Fig 8: Locating Fuel Injector Pipe For LH Side
      G04999346
    • RH SIDE
      Fig 9: Locating Fuel Injector Pipe For RH Side
      G04999347
      Fig 10: Locating Fuel Injector Pipe For RH Side
      G04999348
  11. Tighten the two bolts which install the fuel pipes on the left side of intake manifold.

    Tightening torque: 

    6.4 N.m (0.65 kgf-m, 4.7 ft-lb) 

    Fig 11: Locating Intake Manifold Bolts
    G04999344
  12. Connect the evaporation hoses to the purge valve.
    NOTE: Connect the evaporation hoses as shown in the figure.
    Fig 12: Connecting Evaporation Hoses To Purge Valve
    G04999366
  13. Connect the evaporation hose and purge valve to the intake manifold.
    Fig 13: Identifying Evaporation Hose And Purge Valve
    G04998308
  14. Install the purge control solenoid valve.

    Tightening torque: 

    16 N.m (1.6 kgf-m, 11.8 ft-lb) 

    Fig 14: Locating Purge Control Solenoid Valve
    G04998307
  15. Connect the hoses to the purge control solenoid valve.
    NOTE: Connect the evaporation hoses as shown in the figure.
    Fig 15: Connecting Hoses To Purge Control Solenoid Valve
    G04999369
  16. Connect the connector to the purge control solenoid valve.
  17. Connect the connector to the tumble generator valve sensor.
    Fig 16: Identifying Connector For Tumble Generator Valve Sensor
    G04998306
  18. Connect the connector to the tumble generator valve actuator.
    Fig 17: Identifying Connector For Tumble Generator Valve Actuator
    G04998305
  19. Connect the connector to the fuel injector.
    Fig 18: Identifying Connector For Fuel Injector
    G04999339
  20. Install the throttle body to the intake manifold.
    NOTE: Replace the gasket with a new one.

    Tightening torque: 

    8 N.m (0.8 kgf-m, 5.8 ft-lb) 

    Fig 19: Identifying Throttle Body
    G04998255
  21. Connect the connector to the throttle position sensor (A) and manifold absolute pressure sensor (B).
    Fig 20: Identifying Throttle Position Sensor And Manifold Absolute Pressure Sensor
    G04998253
  22. Install the engine ground terminal to the intake manifold.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 21: Identifying Engine Ground Terminal
    G04998300
    Fig 22: Identifying Engine Ground Terminal
    G04998301
  23. Install the fuel pipe protector RH.

    Tightening torque: 

    19 N.m (1.94 kgf-m, 13.7 ft-lb) 

    Fig 23: Locating Fuel Pipe Protector RH
    G04999334