Removal (GS430 & SC430)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Lexus SC 430, 2002 Lexus RX 300, 2002 Lexus LX 470, 2002 Lexus LS 430, and 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
- Knock sensors are located under intake manifolds on cylinder block. To remove knock sensors, upper and lower intake manifolds must be removed. Remove engine cover. Remove intake air connector pipe located between throttle body and air cleaner assembly. Remove air cleaner assembly. Remove throttle body. See THROTTLE BODY under FUEL SYSTEM. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect fuel inlet hose. See Figure.
- Disconnect EVAP vacuum switching valve connector. Disconnect EVAP vacuum switching valve vacuum hose. Remove EVAP air inlet hose from air tube. Remove engine cover brackets. See Figure. Remove 4 bolts and left wiring harness protector from upper intake manifold and camshaft bearing cap. Disconnect wiring harness clamps from brackets on right fuel rail. Remove bolts and disconnect rear engine wiring harness protector from rear water bypass joint and right cylinder head.
- Disconnect injector connectors. Remove bolts, nuts, upper intake manifold, lower intake manifold assembly and gaskets. Disconnect knock sensor connector(s) and remove knock sensor(s).