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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 132 (Engine Controls - Removal & Installation - V6 & V8) >> Engine Sensors & Switches >> Knock Sensor >> Removal (4Runner 4.0L)

Removal (4Runner 4.0L)

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  1. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE  under FUEL SYSTEMS.
  2. Drain cooling system.
  3. Remove "V" bank cover.
  4. Disconnect electrical connectors, vacuum hose and ventilation hose from air cleaner assembly. Remove air cleaner assembly
  5. Disconnect the 2 VSV connectors, disconnect the throttle motor connector and disconnect fuel vapor feed hose from air intake chamber. Remove the 3 wire harness clamps and hose clamp. See Fig 1.
  6. Remove the 3 upper bolts which are used to secure the 2 surge tank stays and throttle body bracket.
  7. Remove the 4 bolts. Remove the 2 nuts, air intake chamber and gasket with throttle body attached.
  8. Remove fuel pipe clamps on opposite sides of intake manifold. Pinch tube connector then pull out fuel pipe.
  9. Disconnect fuel injector connectors. Remove bolts, intake manifold and gaskets.
  10. Remove cylinder heads. See appropriate article in ENGINES. Disconnect heater water inlet hose. See Fig 2.
  11. Remove 4 wire harness clamps. Remove bolt/nuts and water outlet pipe. See Fig 3.
  12. Disconnect 2 knock sensor connectors. Remove the 2 bolts and 2 knock sensors.
Fig 1: Exploded View Of Air Intake Support Chamber & Various Components (4Runner 4.0L)
G00233450Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Disconnecting Heater Water Inlet Hose (4Runner 4.0L)
G00233454Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Removing Water Outlet Pipe (4Runner 4.0L)
G00233458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002