LaCrosse 2006-2007

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation



3.6L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the upper intake manifold.
  6.  
  7. Remove the fuel pipe retaining clip.
  8.  
  9. Disconnect the fuel feed pipe from the fuel injector rail.
    CAUTION
    Wear safety glasses.

  10.  
  11. Use compressed air in order to remove debris from the area where the fuel injectors enter the intake manifold.
  12.  
  13. Remove the fuel rail bolts.
    WARNING
    Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components. Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.

  14.  
  15. Remove the fuel rail with the fuel injectors.
  16.  
  17. Disengage the fuel injector electrical connector lock.
  18.  
  19. Disconnect the fuel injector electrical connector.
  20.  
  21. Remove the fuel injector retainer clip.
  22.  
  23. Remove the fuel injector.
  24.  
  25. Remove and discard the fuel injector seals.

    Click image to see an enlarged view

    Fig. Fuel rail removal-3.6L engine



    Click image to see an enlarged view

    Fig. Fuel injector clip-3.6L engine

  26.  

To install:

  1. Install NEW fuel injector seals.
  2.  
  3. Install the fuel injector.
  4.  
  5. Install the fuel injector retainer clip.
  6.  
  7. Install the fuel injector electrical connector.
  8.  
  9. Engage the fuel injector electrical connector lock.
  10.  
  11. Install the fuel rail with the fuel injectors.
  12.  
  13. Install the fuel rail bolts. Tighten the fuel rail bolts to 89 inch lbs. (10 Nm).
  14.  
  15. Connect the fuel feed pipe to the fuel rail.
  16.  
  17. Install the fuel pipe retaining clip.
  18.  
  19. Install the upper intake manifold.
  20.  

3.8L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Fuel lines
     
    Fuel rail
     
    Injector retaining clips
     
    Fuel injector

    Click image to see an enlarged view

    Fig. Exploded view of the fuel injector assembly-3.8L engine

     

  6.  

To install:

  1. Install or connect the following:

    Fuel injector with new O-rings, coat the o-rings with clean engine oil prior to installation
     
    Injector retaining clips
     
    Fuel rail and torque the bolts to 89 inch lbs. (10 Nm).
     
    Fuel lines
     
    Negative battery cable
     

  2.  

 
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