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Home >> Subaru >> 2017 >> Crosstrek Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H4DO) >> Intake Manifold >> Installation
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Intake Manifold: Installation

  1. Install the engine wiring harness. Ref. to INSTALLATION , Engine Wiring Harness.
  2. Install the intake manifold to the tumble generator valve assembly.
    NOTE: Use a new gasket.

    Tightening torque: 

    8.3 N.m (0.8 kgf-m, 6.1 ft-lb) 

    Fig 1: Locating Intake Manifold To Tumble Generator Valve Assembly Bolts
    G09475488Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the fuel delivery tube and evaporation hose.
    1. Connect the evaporation hose to fuel pipe assembly.
      Fig 2: Locating Evaporation Hose To Fuel Pipe Assembly
      G09475487Courtesy of SUBARU OF AMERICA, INC.
    2. Connect the quick connector of 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 again that the quick connector is securely connected.
    NOTE: Connect the quick connector as shown in the figure.
    Fig 3: Connecting Quick Connector
    G10318382Courtesy of SUBARU OF AMERICA, INC.
    Fig 4: Locating Quick Connector
    G09476943Courtesy of SUBARU OF AMERICA, INC.
  4. Connect the fuel delivery pipe to the fuel pipe LH.
    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 again that the quick connector is securely connected.
    NOTE: Connect the quick connector as shown in the figure.
    Fig 5: Connecting Quick Connector
    G11584010Courtesy of SUBARU OF AMERICA, INC.
    Fig 6: Locating Quick Connector
    G08315345Courtesy of SUBARU OF AMERICA, INC.
  5. Install the intake manifold protector LH.

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

    Fig 7: Locating Intake Manifold Protector LH
    G08315343Courtesy of SUBARU OF AMERICA, INC.
  6. Connect the fuel delivery pipe to the fuel pipe RH.
    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 again that the quick connector is securely connected.
    NOTE: Connect the quick connector as shown in the figure.
    Fig 8: Connecting Quick Connector
    G11584013Courtesy of SUBARU OF AMERICA, INC.
    Fig 9: Locating Quick Connector
    G08315342Courtesy of SUBARU OF AMERICA, INC.
  7. Install the intake manifold protector RH.

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

    Fig 10: Locating Intake Manifold Protector RH
    G08315340Courtesy of SUBARU OF AMERICA, INC.
  8. Install the air cleaner case (rear) together with the air cleaner element. Ref. to INSTALLATION , Air Cleaner Case.
  9. Secure the bulkhead wiring harness with clip (A) and connect the connector to the mass air flow and intake air temperature sensor.
    Fig 11: Locating Connector To Mass Air Flow And Intake Air Temperature Sensor
    G08316829Courtesy of SUBARU OF AMERICA, INC.
  10. Connect the brake booster vacuum hose to the intake manifold.
    Fig 12: Connecting Brake Booster Vacuum Hose To Intake Manifold
    G09475476Courtesy of SUBARU OF AMERICA, INC.
  11. Connect the PCV hose (A) to intake manifold.
  12. Connect the connector (B) to the manifold absolute pressure sensor.
  13. Connect the connector (C) to the throttle position sensor.
    Fig 13: Identifying PCV Hose, Manifold Absolute Pressure Sensor And Throttle Position Sensor Connectors
    G08315336Courtesy of SUBARU OF AMERICA, INC.
  14. Connect the connector (A) to the purge control solenoid valve.
  15. Tighten the nut (C) and bolt (B) which hold EGR pipe to the water pipe assembly.
    NOTE:
    • Use a new gasket.
    • Always tighten the EGR pipe at (C) first, and then (B).

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

    Fig 14: Identifying Purge Control Solenoid Valve Connector, EGR Pipe Mounting Bolts And Nuts
    G08315335Courtesy of SUBARU OF AMERICA, INC.
  16. Install the preheater hose to the throttle body.
    Fig 15: Installing Preheater Hose To Throttle Body
    G08315334Courtesy of SUBARU OF AMERICA, INC.
  17. Install the air intake boot. Ref. to INSTALLATION , Air Intake Boot.
  18. Lift up the vehicle.
  19. Install the under cover. Ref. to INSTALLATION , Front Under Cover.
  20. Lower the vehicle.
  21. Connect the battery ground terminal.
    Fig 16: Connecting Battery Ground Terminal
    G08317298Courtesy of SUBARU OF AMERICA, INC.
  22. Fill engine coolant. Ref. to FILLING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.
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