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Home › Chevrolet › 2021 › Traverse L › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 3.6L (LFY) - Repair Instructions › Repair Instructions › Fuel Injection Fuel Rail Assembly Replacement - Bank 1 › Inspection Procedure

Inspection Procedure

  1. GM2202045Courtesy of GENERAL MOTORS COMPANY

    Inspect the fuel rail (1) and components for the following conditions:

    • Damage, debris or restrictions to the fuel rail
    • Damage, debris or restrictions to the fuel ports in the fuel rail
    • Damage to the mounting area for the fuel rail
    • Damage to the fuel rail mounting bolts or mounting bolt grommets/isolators
    • Damage to the threads on the fuel rail feed fitting
    • Damage to the threads in the fuel pressure sensor bore
    • Damage to the fuel pressure sensor connector, threads, or sealing face
  2. GM2202044Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the attached hexagon.

    Install the fuel pressure sensor (1).

      NOTE:

      Ensure that the fuel rail threads have been cleaned of any excess fuel or the fuel pressure sensor will NOT seal properly.

    1. Lubricate the threads and the sealing area in the fuel rail with silicon free engine oil. Adhesives, Fluids, Lubricants, and Sealers
    2. Lubricate the threads and the sealing area on the fuel pressure sensor with silicon free engine oil. Adhesives, Fluids, Lubricants, and Sealers
    3. Fuel Pressure Sensor (1) - Install and hand tighten
    4. Fuel Pressure Sensor (1) - remove and re-lubricate.
      5. CAUTION:

      Refer to Fastener Caution .

    5. Fuel Pressure Sensor (1) - Install and tighten 33 N.m (25 lb ft).
  3. GM2202046Courtesy of GENERAL MOTORS COMPANY

    Inspect the fuel injectors for the following conditions:

    • Damage to the fuel injector connector (1)
    • Damage to the fuel inlet cone (2)
    • Damage to the fuel injector body (3)
    • Damage to the fuel injector tip (4)
  4. Replace the fuel rail or injector if any damage is found. Do not attempt to repair a fuel rail or injector.
  5. GM2915264Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The fuel injector bushing (1) is to be installed BEFORE O-ring or backup rings are installed.

    Install NEW fuel injector bushing (1) onto injector body. Bushing should seat with a distinct "snap" sound and feel. Ensure bushing is fully seated.

  6. GM2915265Courtesy of GENERAL MOTORS COMPANY

    Install a NEW white plastic spacer (3) on the fuel injector first.

  7. Install a NEW brown plastic spacer (2) second.
  8. Lubricate the NEW O-ring (1) with one drop of clean engine oil.
  9. GM3968970Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Ensure the fuel injectors are installed in the correct orientation. Improper orientation of the fuel injectors may result in engine misfire and possible engine damage.

    The right side (bank 1) fuel injector wiring harness connectors (1) should point to the rear of the engine. The left side (bank 2) fuel injector wiring harness connectors (2) should point to the front of the engine.

  10. GM2915262Courtesy of GENERAL MOTORS COMPANY

    Install NEW fuel injector retainer (3) onto the fuel injector.

  11. Holding the largest diameter/body of the injector only, indicated by arrow in graphic, insert the injector assembly (1) into the fuel rail. Ensure correct orientation of the electrical connector (2).
  12. Rotate the fuel injector approximately 45 degrees until the tab on the retainer (4) locks into the notch on the fuel rail.
  13. Repeat for remaining injectors until all are installed and retained in fuel rail.
  14. GM2202041Courtesy of GENERAL MOTORS COMPANY

    Fuel Injector Wiring Harness (1) - Install

  15. GM5044263Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not use any type of lubricant when installing the NEW seals (2) on the fuel injector tip.

    Install EN 49245-1  long protector (3) onto the fuel injector tip, covering the first recessed area closest to the tip. Place a NEW seal (2) on EN-49245-1  long protector.

  16. Using EN-49245-3  pusher (1), install the seal into the second recessed area (4) of the fuel injector.
    17. NOTE:

    The EN-49245-4  sizer is two sided, and either direction will size the seal correctly.

  17. Compress the seal with your fingers, then resize the seal using the EN-49245-4  sizer (5).
  18. GM5044264Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not use any type of lubricant when installing the NEW seals (2) on the fuel injector tip.

    Install EN-49245-2  short protector (3) onto the fuel injector tip. Place a NEW seal (2) on EN-49245-2  short protector.

  19. Using EN-49245-3  pusher (1), install the seal into the first recessed area (4) of the fuel injector.
    20. NOTE:

    The EN-49245-4  sizer is two sided, and either direction will size the seal correctly.

  20. Compress the seal with your fingers, then resize the seal using the EN-49245-4  sizer (5).
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