[Mudweizer]

Hello everyone!

I need to add some o2 sensors to my headers. I have some 304 o2 sensor bungs(free) and some mild steel headers. Should I even attempt to join these together or should I buy some mild steel bungs and just tig/mig them on?

Thanks for any advice,
Chris

[kermdawg]

Jody has a great video on this site for welding mild steel to stainless.

http://www.weldingtipsandtricks.com/wel ... etals.html

http://www.weldingtipsandtricks.com/wel ... ss-to.html

See if those help. Differant alloys but Im sure you could apply the concepts, just need to figure out the right rod.

Good luck!

[Otto Nobedder]

309 rod/wire is the choice to TIG or MIG 304/304L to most mild steels, but since the sensor is the only weight that they'll see, you'll get satisfactory results with 308 or ER70.

They'll distort a little however you weld them, so consider chasing the threads with the appropriate tap, and use a little anti-seize on the sensor threads, being sure to keep it off the business end of the sensor.

If you have any doubts at all, your local auto supply or speed shop will have them in carbon steel and they shouldn't be more than a few bucks apiece. The advice about the threads and anti-seize still applies. My local auto parts stores have little single-use packets of anti-seize for 99 cents, enough for a spark plug change, and more than plenty for a couple O2 sensors.

Steve

[Mudweizer]

Thanks Steve for the info!