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Removal (RX300)

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.
  1. Air intake chamber and intake manifold must be removed to access knock sensors. Knock sensors are located on either side of cylinder block underneath intake manifold assembly. See Figure. Remove windshield wiper arm nuts and windshield wiper arms.
  2. Remove hood-to-cowl top seal. See Figure. Remove clips, driver's side and passenger's side ventilator louvers. Disconnect electrical connector for windshield wiper motor. Remove wiper motor with wiper link. Remove bolts from cowl top panel and remove panel.
  3. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE  under FUEL SYSTEM. Disconnect negative battery cable. Remove engine cover. Remove air cleaner hose and resonator. Drain cooling system.
  4. Remove air cleaner housing assembly. Disconnect accelerator cable. Disconnect ground cables and ground strap from air intake chamber. See Figure. Disconnect power steering hose from No. 1 engine hanger.
  5. Remove PCV hose from PCV valve at right cylinder head. Remove brake booster vacuum hose from air intake chamber. Disconnect 2 water bypass hoses from throttle body. Remove air assist hose from throttle body. Disconnect EVAP purge hose from pipe on emission control valve set. Remove 2 vacuum hoses from ACIS vacuum tank. Remove engine wire clamp from emission control valve set. Remove No. 1 engine hanger and throttle body bracket.
  6. Disconnect any remaining vacuum hoses and electrical connectors necessary to remove air intake chamber. See Figure. Remove air intake chamber assembly and gasket. Disconnect injector connectors. Remove fuel pipe clamp from No. 1 fuel pipe at fuel inlet pipe. Perform STEP 1. See Figure.
  7. Ensure area around No. 1 fuel pipe and fuel inlet pipe is clean. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel inlet pipe. Perform STEP 2. See Figure. Remove heater hose from intake manifold. Remove intake manifold bolts, nuts and washers. Remove intake manifold, fuel rails and injectors as an assembly. Disconnect Engine Coolant Temperature (ECT) sender gauge connector.
  8. Disconnect ECT sensor connector. Disconnect ground strap near upper radiator hose. Remove upper radiator hose. Remove engine coolant reservoir hose. Disconnect water bypass hose. Remove water outlet and gaskets. Disconnect knock sensor connectors. Remove knock sensors.
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