Sienna 1998-1999

Fuel Rail (Supply Manifold) & Injectors

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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:

    Outer front cowl top panel assembly
     
    Air cleaner cap with hose
     
    Negative battery cable. Work must be started approximately 90 seconds or longer after the negative battery cable has been disconnected, if equipped with an air bag.
     
    Coolant
     
    Accelerator and throttle cables
     
    V-bank cover
     
    Emission valve control set
     
    No. 2 EGR pipe
     
    Hydraulic motor pressure pipe from the water inlet and air inlet chamber
     
    Air intake chamber assembly
     
    Injector wiring
     
    Air assist pipe from the bracket on the No. 1 fuel pipe
     
    Air assist hoses from the intake manifold
     
    Fuel return hose from the No. 1 fuel pipe
     
    Fuel inlet hose for the fuel filter
     
    2 union bolts holding the No. 2 fuel pipe to the delivery pipes
     
    Fuel return hose from the fuel pressure regulator
     
    Union bolt for the right hand delivery pipe, 2 gaskets, 2 bolts, left hand delivery pipe together with the 3 injectors and the No. 2 fuel pipe
     
    Union bolt for the delivery pipe and 2 gaskets from the No. 2 fuel pipe
     
    The 3 bolts, right hand delivery pipe together with the 3 injectors and the No. 1 fuel pipe
     
    The 4 spacers from the intake manifold
     
    The 6 injectors from the delivery pipes
     
    The two O-rings and two grommets from each injector
     

  4.  

To install:

  1. Install or connect the following:

    2 new grommets to each injector
     
    New O-rings, with a light coat of fuel, to each injector
     
    Injectors
     
    The 4 spacers on the intake manifold
     
    Right hand delivery pipe and the No. 1 fuel pipe together with the 3 injectors in position on the intake manifold
     
    Bolt holding the right side delivery pipe, temporarily, to the intake manifold
     
    Left hand delivery pipe and the No. 2 fuel pipe together with the 3 injectors in position on the intake manifold
     
    Fuel return ho