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Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Emission Control Systems (Aux. Emission Control Devices) (2.5L)) >> Leak Check Valve Assembly >> Installation

Leak Check Valve Assembly: Installation

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  1. Connect the drain tube A (A) and drain tube B (B) to the leak check valve assembly.
    CAUTION:
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • After connecting the quick connector, pull the quick connector itself to the disconnecting direction, and then push to the connecting direction in order to confirm secure connection. Make sure to end this check with a pushing step.
    NOTE: Connect the quick connector as shown in the figure.
    G08315501Courtesy of SUBARU OF AMERICA, INC.
  2. Install the tube clamp to the drain tube A (A) and drain tube B (B).
    G10265055Courtesy of SUBARU OF AMERICA, INC.
  3. Set the leak check valve assembly together with drain tube to the vehicle and install the bolt which holds the leak check valve assembly.

    Tightening torque: 

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

  4. Connect the connector (A) to the leak check valve assembly.
    G10265053Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the drain tube (A) to the canister.
    CAUTION:
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • After connecting the quick connector, pull the quick connector itself to the disconnecting direction, and then push to the connecting direction in order to confirm secure connection. Make sure to end this check with a pushing step.
    NOTE: Connect the quick connector as shown in the figure.
    G08315501Courtesy of SUBARU OF AMERICA, INC.
  6. Install the tube clamp (B) to the canister bracket A, and install the drain tube to the tube clamp.
    G10265052Courtesy of SUBARU OF AMERICA, INC.
  7. Connect the drain tube to the drain pipe.
    CAUTION:
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • After connecting the quick connector, pull the quick connector itself to the disconnecting direction, and then push to the connecting direction in order to confirm secure connection. Make sure to end this check with a pushing step.
    NOTE: Connect the quick connector as shown in the figure.
    G08315501Courtesy of SUBARU OF AMERICA, INC.
    G10265037Courtesy of SUBARU OF AMERICA, INC.
  8. Securely insert the fuel filler hose (A) and evaporation hose (B) until the hose end contacts the spool, then attach the clamp and clip as shown in the figure.

    Tightening torque: 

    2.5 N.m (0.3 kgf-m, 1.8 ft-lb)

    G10264909Courtesy of SUBARU OF AMERICA, INC.
    G13640331Courtesy of SUBARU OF AMERICA, INC.
  9. Lift up the transmission jack gradually, and set the rear differential to the rear sub frame assembly.
    NOTE: When inserting the stud bolt into the bushing portion of the rear sub frame assembly, adjust the angle and location of transmission jack and jack stand.
    G09475723Courtesy of SUBARU OF AMERICA, INC.
  10. Temporarily tighten the self-locking nuts which hold the rear differential to the rear sub frame assembly.
    NOTE: Use a new self-locking nut.
    G10264999Courtesy of SUBARU OF AMERICA, INC.
  11. Set the rear differential member to the rear sub frame assembly and rear differential, and temporarily tighten the self-lock nuts which secure the rear differential member to the rear sub frame assembly and rear differential.
    NOTE: Use a new self-locking nut.
    G10265000Courtesy of SUBARU OF AMERICA, INC.
  12. Remove the transmission jack from the rear differential.
  13. Tighten the self-locking nuts which secure the rear differential member to the rear sub frame assembly and rear differential.

    Tightening torque: 

    T1: 50 N.m (5.1 kgf-m, 36.9 ft-lb)

    T2: 110 N.m (11.2 kgf-m, 81.1 ft-lb)

    Fig 1: Rear Differential Member Self-Locking Nuts (With Torque Specification)
    G10265024Courtesy of SUBARU OF AMERICA, INC.
  14. Tighten the self-locking nuts which secure the rear differential to the rear sub frame assembly.

    Tightening torque: 

    70 N.m (7.1 kgf-m, 51.6 ft-lb)

    G10264999Courtesy of SUBARU OF AMERICA, INC.
  15. Connect the connector to the oil temperature sensor.
    G10264998Courtesy of SUBARU OF AMERICA, INC.
  16. Install the propeller shaft. Refer to DRIVE SHAFT SYSTEM>PROPELLER SHAFT>INSTALLATION .
  17. Install the rear exhaust pipe. Refer to EXHAUST(STI)>REAR EXHAUST PIPE>INSTALLATION .
  18. Lower the vehicle.
  19. Connect the ground terminal to the battery.
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