Fuel Injector: Replacement

ST 18683AA000 INSTALLER INJECTOR SEAL

Fig 1: Identifying Seal Guide A And B, Injector Seal Installer And Injector Seal Adjuster

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1. Using a pair of nippers, cut off the injector seal by pinching it.
   CAUTION: Be careful not to damage the fuel injector.
   Fig 2: Cutting Injector Seal

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2. Remove the O-ring and backup ring from the fuel injector.
   Fig 3: Removing O-Ring And Backup Ring From Fuel Injector

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3. Attach the seal guide A to the fuel injector.
   NOTE: Two types of seal guides are provided. So, do not mix up the type to be used.
   Fig 4: Attaching Seal Guide A To Fuel Injector

   Courtesy of SUBARU OF AMERICA, INC.
4. Set the injector seal to the injector seal installer.
   Fig 5: Locating Injector Seal

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5. Push in the injector seal installer slowly in the direction of the arrow, and attach the injector seal to the fuel injector.
   CAUTION:

   • Insert the injector seal straight into the fuel injector.
   • Install the injector seal so that it does not go beyond the fuel injector groove.
   Fig 6: Inserting Injector Seal Straight Into Fuel Injector

   Courtesy of SUBARU OF AMERICA, INC.
6. While rotating the injector seal adjuster to left and right by 90° for each side, slowly insert it all the way.
   NOTE:

   • Apply a thin coat of gasoline to the injector seal and injector seal adjuster.
   • With the injector seal adjuster fully inserted, rotate it to left and right approx. ten times by 90° for each side to normalize the injector seal.
   Fig 7: Installing Injector Seal Adjuster

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7. Attach the seal guide B to the fuel injector.
   NOTE: Two types of seal guides are provided. So, do not mix up the type to be used.
   Fig 8: Attaching Seal Guide B To Fuel Injector

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8. Set the injector seal to the injector seal installer.
   Fig 9: Locating Injector Seal

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9. Push in the injector seal installer slowly in the direction of the arrow, and attach the injector seal to the fuel injector.
   CAUTION:

   • Insert the injector seal straight into the fuel injector.
   • Install the injector seal so that it does not go beyond the fuel injector groove.
   Fig 10: Inserting Injector Seal Straight Into Fuel Injector

   Courtesy of SUBARU OF AMERICA, INC.
10. While rotating the injector seal adjuster to left and right by 90° for each side, slowly insert it all the way.
    NOTE:

    • Apply a thin coat of gasoline to the injector seal and injector seal adjuster.
    • With the injector seal adjuster fully inserted, rotate it to left and right approx. ten times by 90° for each side to normalize the injector seal.
    Fig 11: Checking Injector Seal Adjuster Fully Inserted

    Courtesy of SUBARU OF AMERICA, INC.
11. Attach two backup rings and O-ring to the fuel injector.
    NOTE: Use new backup rings and O-ring.
    Fig 12: Identifying O-Ring, Backup Ring (Brown And White)

    Courtesy of SUBARU OF AMERICA, INC.