Installation (GS430 & LS430)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

To install, reverse removal procedure. Install NEW IAC valve actuator gasket. Slightly rotate actuator lever clockwise. See Fig 2. Connect actuator and air control valve levers. Install IAC valve.
Install NEW intake manifold gaskets with White mark facing upward. Marks are painted on outer tabs of gasket. Ensure longer intake manifold bolts are installed in proper location. See Fig 3. Ensure to route IAC valve actuator vacuum hose under rear fuel line when reconnecting. Tighten all nuts/bolts to specification. See TORQUE SPECIFICATIONS .

Fig 1: Identifying Intake Air Control Valve (GS430 & LS430)

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Fig 2: Installing Air Control Valve Actuator Lever (GS430 & LS430)

Fig 3: Installing Intake Manifold Bolts (GS430 & LS430)