Toyota 17104-20030 Right Exhaust Manifold Sub-Assembly

After disconnecting the exhaust manifold fasteners, you should disconnect the electrical connector from the oxygen sensor at each manifold.

It is important to check the catalytic converter for leaks, corrosion, dents, and other damage whenever the vehicle is raised for servicing of underbody components.

Check with a dealer service department before replacing the converter, as there is a federally mandated extended warranty that covers emissions-related components, including the catalytic converter.

Unplug the oxygen sensor wire harness and the clamp over the harness.

1. Connect a vacuum gauge to an intake manifold vacuum source. 2. Warm the engine to operating temperature, place the transaxle in Park, and apply the parking brake. 3. Note and record the vacuum reading at idle. 4. Quickly open the throttle to near full throttle and release it shut, then note and record the vacuum reading. 5. Perform the test three more times, recording the reading after each test. 6. If the reading after the fourth test is more than one in-Hg lower than the idle reading, the exhaust system may be restricted, indicating that the catalytic converter could be plugged or that an exhaust pipe or muffler could be restricted.

Disconnect the electrical connector from the oxygen sensor at each manifold.

Toyota just calls it rh exhaust manifold.