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Home >> Subaru >> 2018 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control/Fuel Injection System (H4DOTC) >> Intake Manifold >> Installation
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Intake Manifold: Installation

  1. Install the vacuum hose assembly to the water pipe assembly.

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

    G12508871Courtesy of SUBARU OF AMERICA, INC.
  2. Install the intake manifold and tumble generator valve assembly to the air intake adapter.
    NOTE: Use a new gasket.

    Tightening torque: 

    25 N.m (2. kgf-m, 18.4 ft-lb)

    G12508872Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the fuel delivery pipe (A) and vacuum hose (B) to the fuel pipe assembly.
    CAUTION:
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • When connecting the quick connector, make sure to insert it all the way in before locking the slider.
    • When it is difficult to lock the slider, check that the connector is fully inserted.
    • After locking the slider, check that the quick connector is securely connected.
    NOTE: Connect the quick connector as shown in the figure.
    G12508873Courtesy of SUBARU OF AMERICA, INC.
    G12508874Courtesy of SUBARU OF AMERICA, INC.
  4. Install the fuel pipe assembly to the intake manifold.

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

    G12508875Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the fuel delivery tube and evaporation hose.
    1. Connect the evaporation hose to fuel pipe assembly.
      G12508876Courtesy of SUBARU OF AMERICA, INC.
    2. Connect the connector on the fuel delivery tube to the fuel pipe assembly, and secure the fuel delivery tube using clip (A).
      CAUTION:
      • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
      • When connecting the quick connector, make sure to insert it all the way in before locking the slider.
      • When it is difficult to lock the slider, check that the connector is fully inserted.
      • After locking the slider, check that the quick connector is securely connected.
      NOTE: Connect the quick connector as shown in the figure.
      G12508877Courtesy of SUBARU OF AMERICA, INC.
      G12508878Courtesy of SUBARU OF AMERICA, INC.
  6. Install the EGR pipe. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>EGR Pipe>INSTALLATION .
  7. Secure the engine wiring harness to the intake manifold using clip.
    G12508879Courtesy of SUBARU OF AMERICA, INC.
  8. Connect the connector (B) to the tumble generator valve RH.
  9. Connect the connector (A) to the tumble generator valve LH, and secure the fuel pipe protector to the intake manifold.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 14.0 ft-lb)

    G12508880Courtesy of SUBARU OF AMERICA, INC.
  10. Connect connectors to the manifold absolute pressure & intake air temperature sensor.
    G12508881Courtesy of SUBARU OF AMERICA, INC.
  11. Connect the connector to the purge control solenoid valve.
    G12508882Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the vacuum hose to the canister pipe.
    G12508883Courtesy of SUBARU OF AMERICA, INC.
  13. Connect the vacuum control hose and vacuum hose to the vacuum pipe assembly.
    G12508884Courtesy of SUBARU OF AMERICA, INC.
  14. Secure the PCV pipe and generator cord to the intake manifold using the clip.
    G12508885Courtesy of SUBARU OF AMERICA, INC.
  15. Install the brake booster vacuum hose to the clip (D).
    NOTE: If the clip is removed from the intake manifold, install the clip to the position of alignment mark of intake manifold.
  16. Connect sections (A) and (B) of the brake booster vacuum hose to the brake vacuum pump and intake manifold, and install the brake booster vacuum hose to the clip (C).
    G12508886Courtesy of SUBARU OF AMERICA, INC.
  17. Connect the preheater hose (B) to the throttle body, and connect the connector (A) to the throttle body.
    G12508887Courtesy of SUBARU OF AMERICA, INC.
  18. Connect the PCV hose to the PCV valve.
    G12508888Courtesy of SUBARU OF AMERICA, INC.
  19. Install the intake duct No. 3. Ref. to INTAKE (INDUCTION) (H4DOTC)>INTAKE DUCT>INSTALLATION>INTAKE DUCT NO. 3 .
  20. Install the intake duct No. 2. Ref. to INTAKE (INDUCTION) (H4DOTC)>INTAKE DUCT>INSTALLATION>INTAKE DUCT NO. 2 .
  21. Install the intercooler. Ref. to INTAKE (INDUCTION) (H4DOTC)>Intercooler>INSTALLATION .
  22. Fill engine coolant. Ref. to COOLING (H4DOTC)>Engine Coolant>REPLACEMENT>FILLING OF ENGINE COOLANT .
  23. Install the under cover. Ref. to EXTERIOR/INTERIOR TRIM>Front Under Cover>INSTALLATION .
  24. Lower the vehicle.
  25. Connect the battery ground terminal.
  26. Install the collector cover.
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