RX300 1999

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation





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Fig. Fuel rail and injectors

  1. Before servicing the vehicle, refer to the precautions 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 hose to the fuel pressure regulator
     

  2.  
  3. Temporarily install the 2 bolts holding the left hand delivery pipe to the intake manifold.
  4.  
  5. Temporarily install the No. 2 fuel pipe to the left side delivery pipe with the union bolt and 2 new gaskets.
  6.  
  7. Check that the injectors rotate smoothly. If they do not, replace the O-rings.
  8.  
  9. Position the injector connector outward. Tighten the 4 bolts holding the delivery pipes to the intake manifold and tighten to 7 ft. lbs. (10 Nm). Tighten the bolt holding the No. 1 fuel pipe to the intake manifold to 14 ft. lbs. (20 Nm). Tighten the 2 union bolts holding the no. 2 fuel pipe to the delivery pipes to 24 ft. lbs. (32 Nm).
  10.  
  11. Install or connect the following:

    Fuel inlet and return hoses. Union bolt: 22 ft. lbs. (30 Nm)
     
    Fuel return hose to the No. 1 fuel pipe. Pass the fuel return hose under the heater hoses.
     
    Air assist hoses to the intake manifold
     
    Air assist pipe to the bracket on the No. 1 fuel pipe
     
    Fuel injector wiring connectors
     
    Air intake chamber assembly
     
    Hydraulic motor pressure pipe to the intake chamber. Bolts: 69 inch lbs. (8 Nm)
     
    No. 2 EGR pipe with new gaskets, tighten to 9 ft. lbs. (12 Nm)
     
    Emission control valve set
     
    V-bank cover
     
    Air cleaner hose
     
    Throttle and accelerator cables
     
    Coolant
     
    Air cleaner cap with hose
     
    Outer front cowl top panel assembly
     
    Negative battery cable
     

  12.  

 
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