Sienna 1998-1999

Intake Manifold

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Removal & Installation



  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Wiper and blade assembly
     
    Top cowl seal and panel
     
    Window washer hoses from the ventilator louvers
     
    Left and right ventilator louvers
     
    Heater air duct
     

  4.  
  5. Properly relieve the fuel system pressure.
  6.  
  7. Remove the battery and battery tray.
  8.  
  9. Drain and recycle the engine coolant.
  10.  
  11. Remove or disconnect the following:
    NOTE
    The delivery pipes with injectors will be attached to the manifold.



    Accelerator cable, on automatic transaxles
     
    Throttle cable
     
    Air cleaner cap assembly
     
    Any wiring or hoses interfering with removal
     
    Right side engine mount stay
     
    Radiator and heater hoses in the way of the intake manifold removal
     
    V-bank cover
     
    All the vacuum hose and wiring for the emission control valve set
     
    Air intake chamber and discard the gasket
     
    Exhaust Gas Recirculation (EGR) pipe and discard the gaskets
     
    Hydraulic motor pressure hose from the air intake chamber
     
    Engine wiring harnesses from the left side, right side, rear and No. 3 timing belt cover
     
    Front exhaust pipe, if necessary
     
    Timing belt, camshaft timing pulleys, No. 2 idler pulley and No. 3 timing belt cover
     
    Cylinder head rear plate
     
    2 bolts, nuts and plate washers with the intake manifold.
     



    Other fuel related components such as the No. 2 fuel pipe and pulsation damper, if needed
     
    Delivery pipes from the intake manifold
     

  12.  
  13. Clean and inspect the intak