2004 Lexus LX 470FACTORY OEM SERVICE PROCEDURE

SFI System: Injector: Installation

  1. INSTALL INJECTORS AND DELIVERY PIPES 
    NOTE:
    • Be careful not to drop the injectors when installing the delivery pipes. 
    • Since the O-ring may be stuck to the injector, do not put a side load on it at the removal. 
    1. Install a new grommet to each injector.
    2. Apply a light coat of gasoline to new O-rings and install them to each injector.
      3. Fig 1: Identifying Grommet & O-Ring
      G00920327Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. While turning the injector clockwise and counterclockwise, push it to the delivery pipes. Install the 8 injectors.
    4. Position injector connector outward.
      5. Fig 2: Identifying Connector
      G00920328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Place the 4 spacers and 8 new insulators on the intake manifold.
    6. Place the 2 delivery pipes and the injectors assemblies on the lower intake manifold.
    7. Temporarily install the 4 nuts.
    8. Install the front fuel pipe with the bolt, the 4 new gaskets and the 2 union bolts.
      1. Torque: 39 N.m (400 kgf.cm, 29 ft.lbf) for union bolts 7.5 N.m (80 kgf.cm, 66 in.lbf) for bolt 
      Fig 3: Identifying Fuel Return Pipe & Connector
      G00920329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Install the bolt holding the clamp on the fuel return pipe to the LH delivery pipe.
      1. Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf) 
    10. Check that the injectors rotate smoothly.
      Fig 4: Checking Injector Rotation
      G00920330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      If injectors do not rotate smoothly, the probable cause is incorrect installation of O-rings. Replace the O-rings in that case.

    11. Position the injector connector outward.
    12. Tighten the 4 nuts holding the delivery pipes to the lower
    13. Intake manifold.
      1. Fig. Torque: 21 N.m (214 kgf.cm, 15 ft.lbf) 
    14. Connect the 8 injectors connectors.
  2. INSTALL ENGINE WIRE TO LH DELIVERY PIPE 

    Install the 2 wire clamps on the engine wire to the brackets on the delivery pipe.

    3. Fig 5: Installing Wire Clamps
    G00920331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL ENGINE WIRE PROTECTOR 
    1. Connect the engine wire clamp to the No.1 engine hanger.
    2. Install the engine wire protector with the 2 bolts.
    3. Connect the PCV hose to the PCV valve.
    4. Connect VSV EVAP to the upper intake manifold.
    5. Install the No.1 V-bank cover bracket to the upper intake manifold.
    6. Install the No.2 V-bank cover bracket to the upper intake manifold.
    7. Install the No.3 V-bank cover bracket to the upper intake manifold.
    8. Install the No.4 V-bank cover bracket to the upper intake manifold.
  4. INSTALL FUEL PRESSURE PULSATION DAMPER (See  PRECAUTION  ) 
  5. INSTALL INTAKE AIR CONNECTOR 
  6. INSTALL V-BANK COVER 
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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