Exhaust System: Service and Repair

Removal and Installation

CAUTION:
^ Always replace exhaust gaskets with new ones when reassembling.
^ With the engine running, check all of the tube connections for exhaust gas leaks, and the entire system for unusual noises.
^ Check to ensure that mounting brackets and mounting insulators are installed properly and free from undue stress. Improper installation could result in excessive noise or vibration.
^ Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 meter (19.7 ft.) onto a hard surface such as a concrete floor; install a new one.
^ Before installing a new oxygen sensor, clean the exhaust tube threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
^ do not over-torque the oxygen sensor. Doing so my damage the oxygen sensor, resulting in the MIL coming on.