Removal (LX470)
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.
Disconnect negative battery cable. Drain cooling system. Remove engine cover and intake air connector. See Fig 1. Disconnect throttle control connector PCV hose and water by-pass hose from throttle body. Remove throttle body from intake manifold. Disconnect water bypass hose from manifold thermostat on throttle body and remove throttle body and gasket.