Join the community and post your question. Use our Ask-A-Tech for free now! ASE experts standing by.

Forum > Smog Check Repair > Question

Can I Weld On An Oxygen Sensor?

When replacing the 02 sensor does the sensor need to be welded or sealed into place using some type of sealant? If sealant is needed, what type is required?

Answer:

The oxygen sensor should never be welded on. The oxygen sensor will need to be screwed into the exhaust pipe, or exhaust manifold. On late model vehicles an oxygen sensor will be located before and after the catalytic converter (used to measure catalytic converter efficiency). Dielectric grease may be applied to the oxygen sensor prior to installation. Dielectric grease is electrically insulating and does not break down when voltage is applied. On its use for oxygen sensors it allows for the sensor not to seize onto the exhaust section it is mounted on. posted by SmogTips Support

Related questions and answers you might find useful:

How Do I Get a Smog Check Waiver? by Margaret

Do I Need a Smog Check This Year? by Joy

Mini Cooper DMV Registration Due in 5 Day Won't Pass Smog by anne

2001 Jeep Grand Cherokee Laredo with K&N Air Filter by David

1995 BMW M3 Gross Polluter High HC & NO @ 15MPH by Jared

View SmogTips.com in: Desktop / Mobile