2004 Toyota Tundra Base, AutomaticFACTORY OEM SERVICE PROCEDURE

SFI System (5VZ-FE): Injector: Installation

NOTE:
  • Be careful not to drop the injectors when installing the delivery pipes.
  • Pay attention to put any hung load on the injector to and from the side direction.
  1. TEMPORARILY INSTALL INJECTORS AND DELIVERY PIPES 
    1. Install a new insulator to each injector.
    2. Apply a light coat of spindle oil or gasoline to 2 new O-rings and install them to each injector.
      Fig 1: Applying Light Coat Of Spindle Oil To 2 New O-Rings
      G04207967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. While turning the injector clockwise and counterclockwise, push it to the delivery pipes. Install the 6 injectors.
    4. Position the injector connector outward.
      Fig 2: Turning Injector Clockwise
      G04207968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Place the 4 spacers in position on the intake manifold.
    6. Place the delivery pipes with the 6 injectors in position on the intake manifold.
    7. Temporarily install the 4 bolts holding the delivery pipes to the intake manifold.
      Fig 3: Placing Delivery Pipes With Injectors On Intake Manifold
      G04207969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Check that the injectors rotate smoothly.

      HINT:

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

    9. Position the injector connector outward.
  2. CONNECT INJECTOR CONNECTORS 
    Fig 4: Checking Injectors Rotate Smoothly
    G04207970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL FUEL PIPE AND TIGHTENING DELIVERY PIPE HOLDING BOLTS 
    1. Install the fuel pipe with 4 new gaskets and the 2 union bolts.

      Torque: 34.3 N.m (350 kgf.cm, 25 ft.lbf) 

    2. Tighten the 4 bolts holding the delivery pipes to the intake manifold.

      Torque: 13 N.m (130 kgf.cm, 10 ft.lbf) 

    Fig 5: Tightening Delivery Pipes Bolts
    G04207971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CONNECT FUEL INLET PIPE 
    1. Temporarily install the union and 2 new gaskets, and connect the fuel pipe.
    2. Install the clamp bolt.

      Torque: 8 N.m (80 kgf.cm, 71 in.-lbf) 

    3. Tighten the union bolt.

      Torque: 34.3 N.m (350 kgf.cm, 25 ft.lbf) 

  5. INSTALL FUEL PRESSURE REGULATOR (See  REPLACEMENT  ) 
    Fig 6: Installing Clamp Bolt
    G04207972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. VISUALLY INSPECT AIR ASSIST LINES AND CONNECTIONS 

    Look for loose connections, sharp bends or damage.

  7. INSTALL INTAKE AIR CONNECTOR (See  ENGINE UNIT (2WD) (5VZ-FE)  ) 
  8. INSTALL AIR CLEANER HOSE 
  9. CHECK FOR FUEL LEAKS 
    Fig 7: Inspecting Air Assist Lines And Connections
    G04207973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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