2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Intake Manifold: Disassembly

  1. REMOVE VACUUM CONTROL VALVE SET 
    1. Disconnect the vacuum hose from the intake air control valve actuator.
    2. Disconnect the VSV connector (for ACIS).
    3. Disconnect the 2 vacuum hoses from the manifold and clamp.
    4. Remove the bolt and harness clamp.
    5. Remove the 2 nuts and vacuum control valve set.
      Fig 1: Locating Vacuum Control Valve Set
      G05289271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. REMOVE INTAKE AIR CONTROL VALVE ACTUATOR 
    1. Remove the 3 nuts, actuator and gasket.
      Fig 2: Locating Intake Air Control Valve Actuator
      G05289272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE INTAKE MANIFOLD SUB-ASSEMBLY UPPER 
    1. Remove the 14 bolts, 6 nuts, manifold upper and gasket from the manifold lower.
      Fig 3: Locating Bolts, Nuts, Manifold Upper And Gasket From Manifold Lower
      G05289273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE INTAKE AIR CONTROL VALVE ASSEMBLY 
    1. Remove the 6 bolts and control valve.
      Fig 4: Locating Intake Air Control Valve Assembly
      G05289274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE VACUUM SWITCHING VALVE ASSEMBLY (for ACIS) 
    1. Remove the screw and VSV from the vacuum tank.
      Fig 5: Locating Valve With Bolts
      G05289275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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