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Home >> Subaru >> 2004 >> Impreza RS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) (H4SO) >> Intake Manifold >> Assembly
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Intake Manifold: Assembly

  1. Install the fuel pipe assembly and pressure regulator to the intake manifold.
  2. Tighten the bolt which installs the fuel pipes on the intake manifold.

    Tightening torque: 

    5.0 N.m (0.51 kgf-m, 3.7 ft-lb) 

    Fig 1: Tightening Bolt At The Fuel Pipes On The Intake Manifold
    G00800517Courtesy of SUBARU OF AMERICA, INC.
  3. Install the fuel injector pipe.
  4. Connect the fuel injector pipe RH to fuel hose, and then tighten the clamp screw.
    Fig 2: Connecting The Fuel Injector Pipe (RH Side) To Fuel Hose, & Tightening The Clamp Screw
    G00800518Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the fuel injector pipe LH to fuel hose, and then tighten the clamp screw.
    Fig 3: Connecting The Fuel Injector Pipe (LH Side) To Fuel Hose, & Tightening The Clamp Screw
    G00800519Courtesy of SUBARU OF AMERICA, INC.
  6. Connect the air by-pass hoses.
    Fig 4: Connecting The Air By-Pass Hoses
    G00800520Courtesy of SUBARU OF AMERICA, INC.
  7. Install the fuel injectors.
    NOTE:
    • Replace the O-rings with new ones.
      Fig 5: Replacing The O-Rings With New Ones
      G00800521Courtesy of SUBARU OF AMERICA, INC.
    • Do not forget to install the fuel injector securing clip.
      Fig 6: Installing Fuel Injector Securing Clip
      G00800522Courtesy of SUBARU OF AMERICA, INC.
  8. Tighten the bolt which installs the injector pipe on the intake manifold.
    • RH SIDE 

      Tightening torque: 

      5.0 N.m (0.51 kgf-m, 3.7 ft-lb) 

      Fig 7: Tightening Bolt At The Injector Pipe On The Intake Manifold (RH Side) (1 Of 2)
      G00800523Courtesy of SUBARU OF AMERICA, INC.

      Tightening torque: 

      19 N.m (1.9 kgf-m, 13.7 ft-lb) 

      Fig 8: Tightening Bolt At The Injector Pipe On The Intake Manifold (RH Side) (2 Of 2)
      G00800524Courtesy of SUBARU OF AMERICA, INC.
    • LH SIDE 

      Tightening torque: 

      5.0 N.m (0.51 kgf-m, 3.7 ft-lb) 

      Fig 9: Tightening Bolt At The Injector Pipe On The Intake Manifold (LH Side) (1 Of 2)
      G00800525Courtesy of SUBARU OF AMERICA, INC.

      Tightening torque: 

      19 N.m (1.9 kgf-m, 13.7 ft-lb) 

      Fig 10: Tightening Bolt At The Injector Pipe On The Intake Manifold (LH Side) (2 Of 2)
      G00800526Courtesy of SUBARU OF AMERICA, INC.
  9. Tighten the two bolts which install the fuel pipes on intake manifold.

    Tightening torque: 

    5.0 N.m (0.51 kgf-m, 3.7 ft-lb) 

    Fig 11: Identifying Fuel Pipe Bolts At Intake Manifold
    G00800527Courtesy of SUBARU OF AMERICA, INC.
  10. Install the engine harness onto the intake manifold.
  11. Hold the engine harness by harness band (A) and bolts (B).

    Tightening torque: 

    16 N.m (1.6 kgf-m, 11.8 ft-lb) 

    Fig 12: Holding The Engine Harness By Harness Band (A) & Bolts (B)
    G00800528Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the connector to fuel injector
  13. Install the fuel pipe protector RH.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 13.7 ft-lb) 

    Fig 13: Installing Fuel Pipe Protector (RH Side)
    G00800529Courtesy of SUBARU OF AMERICA, INC.
  14. Install the fuel pipe protector LH.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 13.7 ft-lb) 

    Fig 14: Installing Fuel Pipe Protector (LH Side)
    G00800530Courtesy of SUBARU OF AMERICA, INC.
  15. Install the purge control solenoid valve. < Ref. to INSTALLATION , Purge Control Solenoid Valve. >
  16. Connect the pressure regulator vacuum hose to the intake manifold.
    Fig 15: Connecting The Pressure Regulator Vacuum Hose To The Intake Manifold
    G00800531Courtesy of SUBARU OF AMERICA, INC.
  17. Install the air assist injector solenoid valve to the bracket. < Ref. to INSTALLATION , Air Assist Injector Solenoid Valve. >
  18. Install the throttle body to the intake manifold. < Ref. to INSTALLATION , Throttle Body. >
  19. Install the ignition coil & ignitor Assy. < Ref. to INSTALLATION , Ignition Coil & Ignitor assy. >