Lexus RX400h, Hybrid 3 2006

Intake Manifold

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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 engine oil.
  6.  
  7. Drain the coolant from the engine radiator and hybrid transaxle.
  8.  
  9. Remove the service plug grip, found underneath the Battery Service cover on the rear seat. Wait 5 minutes to discharge the high voltage capacitor.
  10.  
  11. Remove or disconnect the following:

    Negative battery cable
     
    Engine cover
     
    Right-hand front wheel
     
    Engine splash shields
     
    Right-hand front fender apron seal
     
    Wiper and blade assembly
     
    Top cowl ventilator louver assembly
     
    Wiper motor and link assembly
     
    Battery and battery tray
     
    Air intake assembly
     
    Converter with Inverter assembly
     
    Emission control valve set
     
    Intake air surge tank
     
    Fuel supply hose
     
    Heater inlet hose
     
    Intake manifold ground cable
     
    Fuel injector connectors
     

  12.  
  13. Loosen the intake manifold mounting bolts in several steps, in sequence as shown.
  14.  
  15. Remove the intake manifold and gaskets.

    Click image to see an enlarged view

    Fig. Intake manifold removal sequence

  16.  

To install:

  1. Install the intake manifold and gaskets. Tighten the bolts in sequence to 11 ft. lbs. (15 Nm).

    Click image to see an enlarged view

    Fig. Intake manifold installation sequence

  2.  
  3. Install or connect the following:

    Fuel injector connectors
     
    Intake manifold ground cable. Tighten to 11 ft. lbs. (15 Nm).
     
    Heater inlet hose. Tighten to 74 inch lbs. (8.4 Nm).
     
    Fuel supply hose
     
    Intake air surge tank
     
    Emission control valve set
     
    Converter with Inverter assembly
     
    Air intake assembly
     
    Battery and battery tray
     
    Wiper motor and link assembly
     
    Top cowl ventilator louver assembly
     
    Wiper and blade assembly
     
    Right-hand front fender apron seal
     
    Engine splash shields
     
    Right-hand front wheel
     
    Engine cover
     
    Negative battery cable
     

  4.  
  5. Refill the engine oil to the correct level.
  6.  
  7. Refill the coolant to the engine radiator and hybrid transaxle to the correct level.
  8.  
  9. Replace the service plug grip.
  10.  
  11. If necessary, perform the initialization procedure, as outlined in the Chassis Electrical System.
  12.  
  13. Start the engine and check for leaks.
  14.  

 
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