Toyota 17120-36020 Manifold Assembly, INTAK

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To remove the components, first relieve the fuel system pressure and disconnect the cable from the negative battery terminal. Next, remove the air intake duct and resonator, followed by the cowl cover and vent tray/sub-frame, ensuring the wiper motor and linkage are completely removed. After that, take off the engine cover and disconnect the vacuum hose connection tube from the hoses and retainers at the firewall. Drain the cooling system and remove the heater hoses going into the firewall. Then, remove the throttle body from the intake manifold and disconnect the vent tubes. Disconnect the electrical connector to the vacuum switching valve, remove the harness bracket fasteners, and move the harness aside. Disconnect the fuel inlet line to the fuel rail and, from under the intake manifold, disconnect the tumble control valve actuator electrical connector. Disconnect the electrical connectors from the fuel rail, remove the harness mounting fasteners, and set the harness aside. Disconnect and remove the main harness connector to the intake manifold and tumble control valves. Apply battery voltage to terminal no.8 of the tumble control valve electrical connector while grounding terminal no.4 for no longer than three seconds to close the tumble control valve, preventing damage during manifold removal. Remove the intake manifold lower bolts, unscrew the upper mounting fasteners, and take off the manifold. For installation, clean the mating surfaces of the intake manifold and cylinder head with lacquer thinner or acetone, checking for warpage and replacing the manifold if necessary. Press a new gasket into the grooves on the intake manifold, then install the manifold and gasket over the studs on the cylinder head. Tighten the manifold-to-cylinder head nuts/bolts in three or four equal steps, working from the center out to avoid warping. Finally, reinstall the remaining parts in reverse order, check the coolant level, and run the engine to check for leaks.