Toyota 17120-22030 Manifold, Intake

To remove the components, first relieve the fuel system pressure, then disconnect the negative cable from the battery. Next, remove the engine cover, release the two clamps, and set aside the fuel-injection wiring harness. Remove the fuel rail and injectors as an assembly, and also detach the throttle body from the intake manifold, labeling and disconnecting the necessary components such as the PCV hose, accelerator cable, air intake duct and air filter cover, throttle body, and fuel rail and injectors. Note that 2005 and later models feature a "drive-by-wire" electronic throttle control, which does not use a cable, so disconnect the electrical connector at the throttle motor on the throttle body. Label and detach the PCV and vacuum hoses connected to the rear of the intake manifold, then remove the intake manifold mounting nuts, bolts, and support bracket bolts, taking out the manifold and gasket from the engine. For installation, clean the mating surfaces of the intake manifold and cylinder head with lacquer thinner or acetone, and if the gasket shows signs of leaking, have the manifold checked for warpage and resurfaced if necessary. Install a new gasket over the manifold studs, position the manifold on the cylinder head, and install the nuts, bolts, and brackets, tightening them in three or four equal steps from the center outwards to avoid warping. After tightening the manifold-to-cylinder head bolts to the proper torque, tighten the lower bracket bolts. Reinstall the remaining parts in the reverse order of removal, check the coolant level and add as necessary, then check the throttle linkage for smooth operation before starting the engine. Once the engine is running, check for coolant and vacuum leaks, and conduct a road test to ensure proper operation of all accessories, including the cruise control system if equipped.

Install the remaining parts in the reverse order of removal. Check the coolant level, adding as necessary.