2008 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Throttle Body: Installation

  1. INSTALL THROTTLE BODY ASSEMBLY 
    1. Install a new gasket to the intake manifold.

      HINT:

      Align the protrusion of the gasket with the groove on the intake manifold.

      Fig 1: Identifying Throttle Body Assembly
      G05771223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the No. 4 water and No. 5 water by-pass hoses to the throttle body.

      HINT:

      • Position the claws of the clamps as shown in the illustration.
      • Install the clamps so that they are within the hose's paint marks.
        Fig 2: Identifying No. 4 Water And No. 5 Water By-Pass Hoses To Throttle Body
        G05771224Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Install the throttle body with the 4 bolts.

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

      Fig 3: Locating Throttle Body With Bolts
      G04943028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the throttle motor connector.
  2. INSTALL INTAKE AIR CONNECTOR PIPE 
    1. Align the protrusion of the intake air resonator with the cutout of the bracket and insert the protrusion.
    2. Install the intake air connector pipe with the 3 hose clamps.

      Torque: for intake air connector pipe and throttle body 

      4.8 N*m (49 kgf*cm, 42 in.*lbf) 

      for intake air connector pipe and intake air resonator 

      3.8 N*m (39 kgf*cm, 34 in.*lbf) 

      HINT:

      • Insert the protrusion of the intake air connector pipe into the hole of the hose clamp.
      • The intake air connector pipe and throttle body clamp can be tightened within the range of 4.0 N*m (41 kgf*cm, 35 in.*lbf) to 5.5 N*m (56 kgf*cm, 49 in.*lbf), and the intake air connector pipe and intake air resonator clamp can be tightened within the range of 2.0 N*m (20 kgf*cm, 18 in.*lbf) to 5.5 N*m (56 kgf*cm, 49 in.*lbf).
        Fig 4: Locating Intake Air Connector Pipe
        G05771219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Attach the wire harness clamp.
      4. Fig 5: Attaching Wire Harness Clamp
      G05771227Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the No. 1 and No. 2 ventilation hoses to the intake air connector pipe.

      HINT:

      • Position the claws of the clamps as shown in the illustration.
      • Install the clamps so that they are within the hose's paint marks.
  3. INSTALL NO. 1 AIR CLEANER INLET  (See INSTALLATION )
  4. ADD ENGINE COOLANT  (See REPLACEMENT )
  5. INSPECT FOR COOLANT LEAK  (See ON-VEHICLE INSPECTION )
  6. INSTALL AIR CLEANER INLET COVER SUB-ASSEMBLY  (See INSTALLATION )
  7. INSTALL V-BANK COVER SUB-ASSEMBLY  (See INSTALLATION )
  8. INSTALL NO. 1 ENGINE UNDER COVER  (See INSTALLATION )
  9. INSTALL FRONT WHEEL OPENING EXTENSION PAD LH  (See INSTALLATION )
  10. INSTALL FRONT WHEEL OPENING EXTENSION PAD RH  (See INSTALLATION )
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.