Lexus RX400h, Hybrid 3 2006

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Engine cover
     
    Wiper arm and blade assembly
     
    Top cowl ventilator louver assembly
     
    Wiper motor and linkage assembly
     
    Air intake assembly
     
    Emission control valve hoses
     
    Air intake surge tank
     

  8.  
  9. Remove the mounting bolt and separate fuel hose No. 1
  10.  
  11. Remove the fuel pressure pulsation damper and gaskets.
  12.  
  13. Remove the fuel hose No. 2 union bolt and gaskets.

    Click image to see an enlarged view

    Fig. Location of components for the fuel hose sub-assembly

  14.  
  15. Disconnect the wiring at the injectors.
  16.  
  17. Remove the 4 bolts and each fuel rail with the injectors still attached.
  18.  
  19. Pull each injector from the fuel rail..
  20.  

To install:

  1. Install new O-rings on each injector. Apply a light coating of gasoline to the O-rings and mating points on the pipes.
  2.  
  3. Using a twisting motion, install the injectors on the pipes.
    NOTE
    Be careful to avoid twisting the O-rings. After installation, check that the injectors turn smoothly. If not, use new O-rings.

  4.  
  5. Install the pipes and injectors.
  6.  
  7. Loosely install the bolts and make sure that the injectors still turn freely. If not, replace the O-rings.
  8.  
  9. Torque the bolts to 84 inch lbs. (10 Nm).
  10.  
  11. The remainder of installation is the reverse of removal. Observe the following torques:

    Fuel hose No. 2 union bolt: 24 ft. lbs. (33 Nm)
     
    Pulsation damper: 24 ft. lbs. (33 Nm)
     
    Fuel hose No.1: 14 ft. lbs. (20 Nm)
     

  12.  
  13. If necessary, perform the initialization procedure, as outlined in the Chassis Electrical System.
  14.  

 
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