2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Intake Manifold: Inspection

  1. INSPECT INTAKE MANIFOLD SUB-ASSEMBLY UPPER 
    1. Using a precision straightedge and feeler gauge, measure the surface contacting the intake manifold upper for warpage.

      Maximum warpage: 0.10 mm (0.0039 in.) 

      If the warpage is greater than the maximum, replace the intake manifold sub-assembly upper.

      Fig 1: Inspecting Intake Manifold Sub-Assembly Upper
      G05289276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT INTAKE MANIFOLD SUB-ASSEMBLY LOWER 
    1. Using a precision straightedge and feeler gauge, measure the surface contacting the cylinder head and intake manifold for warpage.

      Maximum warpage: 0.15 mm (0.0059 in.) 

      If the warpage is greater than the maximum, replace the intake manifold sub-assembly lower.

      Fig 2: Inspecting Intake Manifold Sub-Assembly Lower
      G05289277Courtesy 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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