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Installation Procedure

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM2918343

    Install a NEW combustion fuel injector seal (1) to the EN-51146-2-2  mounting sleeve-long (2).

  2. GM2918345

    Use the EN-51146-2-6-1  slider outside (1) to push down the combustion fuel injector seal (2) on the EN-51146-2-2  mounting sleeve-long (3).

  3. GM2966372

    Push the combustion fuel injector seal (2) over the EN-51146-2-2  mounting sleeve-long, use the EN-51146-2-6-1  slider outside (1) to the fuel injector (3).

  4. Remove the EN-51146-2-2  mounting sleeve-long with the EN-51146-2-1  stylus from the EN-51146-2-6-1  slider outside.
  5. Install a NEW combustion fuel injector seal to the EN-51146-2-3  mounting sleeve-short.
  6. Use the EN-51146-2-6-1  slider outside to push down the combustion fuel injector seal on the EN-51146-2-2  mounting sleeve-short.
  7. Push the combustion fuel injector seal over the EN-51146-2-3  mounting sleeve-short, use the EN-51146-2-6-1  slider outside to the fuel injector.
  8. Remove the EN-51146-2-3  mounting sleeve-short with the EN-51146-2-1  stylus from the EN-51146-2-6-1  slider outside.
  9. GM3621254

    Before using the EN-51146 - 2 - 4  pre-sizing tool (1), check if the fuel injector limiter (2) is in the right position.

  10. GM2918347
    NOTE:

    1st form the combustion fuel injector seals a bit with finger and thumb.

    Push the EN-51146-2-4  pre-sizing tool (1) over the fuel injector (2).

  11. GM2918354

    Tighten the nut (2) and counterhold at the spanner flat of the EN-51146-2-4  pre-sizing tool thread (1) until the measure (a) of 4.5 mm (0.177 in) is reached.

  12. Loosen the nut (2) of the EN-51146-2-4  pre-sizing tool.
  13. GM2918355

    Install the EN-51146-2-4-7  take off chassis (2) to the EN-51146-2-4  pre-sizing tool (3).

  14. Install the EN-51146-2-4-6  screw M10 (1) to the EN-51146-2-4-7  take off chassis (2) and tighten until the EN-51146-2-4  pre-sizing tool (3) is loosed.
  15. GM2968075

    Install the EN-51146-2-5  calibration tool (2) rotary to the fuel injector (1), as shown in the graphic.

  16. Remove the EN-51146-2-5  calibration tool from the fuel injector.
  17. GM2918356
    NOTE:

    The fuel injector seals must fit properly in the relative groove. Overlapping of the fuel injector seals with the external surface of the injector must be avoided. If the seals are installed incorrectly, it could cause leaks and risk of injury.

    Check the combustion fuel injector seals (2 seals per fuel injector) for correct seat:

    • The seal must not be to large, buckled or corrugated (1).
    • The seal must be fixed tight and accurate (2).
  18. If the seals are installed not correctly, repeat the steps 23 - 25 of the removal procedure and the steps 1 - 18 of the installation procedure.
  19. GM2918386

    Install the 4 EN-51146-2-5  calibration tools (2) rotary to the fuel injectors (1).

  20. Remove the fuel injector assembly with the EN-51146-1-2  plate from the bench vise.
  21. GM2918404

    Remove the 8 plate bolts (1) and remove EN-51146-1-2  plate (2), counterhold with a wrench (4) at the EN-51146-1-1  supports (3).

  22. GM2918395
    NOTE:

    Never loosen both EN-51146-1-1  supports at the same time. Failure to follow this caution could cause leaks or malfunction after installation. It is only possible, when the fuel injector will be replaced.

    Remove one EN-51146-1-1  support (2) from the fuel injector (3).

    23. NOTE:

    DO NOT reuse the old fuel injector bolt.

  23. Apply thread lock agent to the NEW fuel injector bolt. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    24. CAUTION:

    Refer to Fastener Caution .

  24. Install NEW fuel injector bolt (1) to the fuel injector and tighten to 5 N.m (44 lb in).
  25. GM2918396

    Remove the EN-51146-1-1  support (1) from the fuel injector (3).

    26. NOTE:

    DO NOT reuse the old fuel injector bolt.

  26. Apply thread lock agent to the NEW fuel injector bolt. Refer to Adhesives, Fluids, Lubricants, and Sealers .
  27. Install a NEW fuel injector bolt (2) to the fuel injector and tighten to 5 N.m (44 lb in).
  28. Repeat the steps 22 - 27 for the other 3 injectors.
  29. Clean the fuel injector bores at the cylinder head. Refer to Fuel Injector and Fuel Injector Bore Cleaning and Inspection .
  30. GM2969109

    Check the fuel injector rail assembly:

    • Check the 4 fuel injector for damage.
    • Check the 8 fuel injector seals for correct seat.
    • Check if all bolts (3) with decoupling elements (1) and retainer (2) are complete.
  31. Remove the 4 EN-51146-2-5  calibration tools from the fuel injector.
  32. GM2918365
    NOTE:

    During the installation of the fuel rail and injector assembly, ensure that the fuel injectors are positioned straight into the injector opening. Failure to follow this caution can tilt or bend the injectors and could cause leaks or malfunction after installation.

    Install carefully the fuel rail assembly (1).

  33. Push the fuel injectors slightly in their seats.
  34. Fig 1: Fuel Rail Bolts Tightening Sequence
    GM2966402

    Tighten the 10 fuel rail bolts (1) in the sequence as shown to 10 N.m (89 lb in).

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