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Home >> Buick >> 2022 >> Envision Preferred, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (LSY) - Repair Instructions >> Repair Instructions >> Fuel Injector Replacement >> Installation Procedure
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Installation Procedure

  1. Fuel Injector Seal Spacer (2) - Install [4x]
    GM5034354Courtesy of GENERAL MOTORS COMPANY
  2. Fuel Injection Fuel Rail Seal (1) - Install NEW [4x]
  3. Direct Fuel Injector Hold Down Clamp (4) - Install NEW [4x]
  4. Fuel Injector (3) - Install [4x]
  5. Check that the nose of the fuel injector (1) sits correct in the fuel rail (2).
    GM5034355Courtesy of GENERAL MOTORS COMPANY
  6. Ensure the EN-50791-100  Fuel Injector Installation Adapter (2) is mounted to the EN-50791  Injector to Rail Installer (1).
    GM5034357Courtesy of GENERAL MOTORS COMPANY
  7. Install EN-50791  Injector to Rail Installer (1) to the fuel injector (3).
  8. Using EN-50791  Injector to Rail Installer (1), compress the fuel injector (4) into the fuel rail.
    GM5034363Courtesy of GENERAL MOTORS COMPANY
    9. NOTE:

    Ensure the fuel injector is fully seated in the fuel rail.

  9. Fuel Injector Retainer (3) - Install
  10. Ensure the fuel injector retainer (3) is fully seated in the fuel rail.
  11. Remove the EN-50791  Injector to Rail Installer (1) along with the EN-50791-100  Fuel Injector Installation Adapter (2).
  12. Repeat the procedure for the other 3 fuel injectors.
  13. Install EN-51955-1  Long Protector (1) onto the fuel injector tip, covering the first recessed area closest to the tip. Place a NEW fuel injector nozzle housing seal (2) on EN-51955-1  Long Protector (1).
    GM4840511Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    DO NOT use any type of lubricant when installing the NEW combustion seals on the fuel injector tip.

  14. Using EN-51955-4  Pusher (3), install the fuel injector nozzle housing seal (2) into the recessed area (4) of the fuel injector, then remove the EN-51955-1  Long Protector.
  15. Compress the fuel injector nozzle housing seal (2) using EN-51955-3  Pre-Sizer (5).
  16. Using EN-51955-5  Sizer (6), resize the fuel injector nozzle housing seal.
  17. Install EN-51955-2  Short Protector (7) onto the fuel injector tip. Place a second NEW fuel injector nozzle housing seal (8) on EN-51105-2  Short Protector (7).
  18. Using EN-51955-4  Pusher (3), install the fuel injector nozzle housing seal (8) into the remaining recessed area (9) of the fuel injector, then remove EN-51105-2  Short Protector.
  19. Compress the fuel injector nozzle housing seal (8) using EN-51955-3  Pre-Sizer (5).
  20. Using EN-51955-5  Sizer (6), resize the fuel injector nozzle housing seal.
  21. Check both of the fuel injector nozzle housing seals on each fuel injector for correct seat:
    GM2918356Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The fuel injector nozzle housing seals must fit properly in the relative groove. Overlapping of the fuel injector nozzle housing seals with the external surface of the injector must be avoided.

    • The fuel injector nozzle housing seal must not be too large, buckled, or corrugated (1)
    • The fuel injector nozzle housing seal must be fixed tight and accurate (2)
  22. If the fuel injector nozzle housing seals are not installed correctly, remove the incorrect fuel injector nozzle housing seal and replace with a NEW fuel injector nozzle housing seal.
  23. Fuel Injector Wiring Harness (1) - Install
    GM5034350Courtesy of GENERAL MOTORS COMPANY
  24. Electrical Connector (2) - Connect [5x]
  25. Install the fuel injection fuel rail assembly. Fuel Injection Fuel Rail Assembly Replacement 
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