2008 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

Throttle Body: Installation

  1. INSTALL THROTTLE BODY 
    1. Install a new throttle body gasket to the intake air surge tank.
      Fig 1: Identifying Throttle Body Gasket
      G04973894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install the throttle body with the 4 bolts.

      Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) 

      Fig 2: Locating Throttle Body Bolts
      G04973892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the 2 water by-pass hoses.
      Fig 3: Locating Water By-Pass Hoses
      G04973891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the throttle body connector and clamp.
  2. INSTALL NO. 1 AIR CLEANER INLET  (See INSTALLATION )
  3. INSTALL AIR CLEANER CASE SUB-ASSEMBLY  (See INSTALLATION )
    Fig 4: Locating Throttle Body Connector And Clamp
    G04973890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL AIR CLEANER CAP SUB-ASSEMBLY 
    1. Install the air cleaner cap sub-assembly, and connect the 3 bands.
      Fig 5: Locating Air Cleaner Cap Sub-Assembly Bands
      G04973889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the mass air flow meter connector (1).
    3. Connect the No. 2 ventilation hose (*2).
    4. Connect the hose band (*3).
      Fig 6: Locating Mass Air Flow Meter Connector And Hose Band
      G04973888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect the 2 vacuum hoses.
  5. INSTALL AIR CLEANER INLET ASSEMBLY  (See INSTALLATION )
  6. ADD ENGINE COOLANT  (See Drain or Add coolant under ON-VEHICLE INSPECTION )
  7. CHECK FOR ENGINE COOLANT LEAKS  (See ON-VEHICLE INSPECTION )
    Fig 7: Locating Vacuum Hoses
    G05247958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. CHECK FUNCTION OF THROTTLE BODY (See  REMOVAL   ) 
  9. INSTALL ENGINE ROOM SIDE COVER LH  (See INSTALLATION )
  10. INSTALL COOL AIR INTAKE DUCT SEAL  (See INSTALLATION )
  11. INSTALL V-BANK COVER SUB-ASSEMBLY  (See INSTALLATION )
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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