Welding and o2 sensor

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Nov 7, 2005 | 07:17 PM

pik

Thread Starter

Racer

Joined: Jun 2003

Posts: 368

Likes: 1

From: Lititz PA

Welding and o2 sensor

I welded up my dual exhaust over the weekend. I have installed an oxygen sensor with an aim to using it for tuning the carb. I was so excited to get the car running I left the o2 sensor in place while I welded on the exhaust. It is a simple closed loop type 1 wire sensor (not the best choice I know). Could welding have damaged the sensor?
I am pretty sure its two different metals generating the voltage in relationship with oxygen content, so it should be ok???

Nov 7, 2005 | 09:49 PM

bobs77vet

Race Director

Joined: Sep 2004

Posts: 11,874

Likes: 263

From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod

did you use oxy/gas, mig or Arc???? i wonder if the electical current did more damage then the heat? I don't really know the answer , but am curious to find out

Nov 7, 2005 | 11:05 PM

zwede

Race Director

Joined: Sep 1999

Posts: 11,360

Likes: 382

From: Plano TX

I've MIG-welded on cars with O2 sensors and there was never any damage.

Nov 7, 2005 | 11:30 PM

comp

Team Owner

Joined: Sep 2003

Posts: 88,393

Likes: 2

From: eville in

Quote:

Originally Posted by bobs77vet

did you use oxy/gas, mig or Arc???? i wonder if the electical current did more damage then the heat? I don't really know the answer , but am curious to find out

Nov 8, 2005 | 04:23 AM

pik

Thread Starter

Racer

Joined: Jun 2003

Posts: 368

Likes: 1

From: Lititz PA

I used a mig welder. The sensor seems ok.

Nov 8, 2005 | 07:46 AM

norvalwilhelm

Race Director

Joined: Nov 2000

Posts: 11,872

Likes: 12

From: Waterloo ontario Canada

Removing it in future could be a problem. You should put lots of anti seize on the threads. I take mine out each year and refresh the anti seize.

Nov 8, 2005 | 12:46 PM

MEGALADON

Safety Car

Joined: Apr 2004

Posts: 3,997

Likes: 1

From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX

Where can I get O2 bung's to weld into the headers??

Nov 8, 2005 | 10:25 PM

stingry

Drifting

Joined: Mar 2003

Posts: 1,608

Likes: 3

From: Canberra AUSTRALIA

St. Jude Donor '05-'06

Innovate Motorsports sells them. Any large muffler shop should also sell them. Jegs or Summit sells the sensors so should sell the bungs also.

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Nov 9, 2005 | 04:49 AM

UKPaul

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Joined: May 2001

Posts: 3,758

Likes: 3

From: Surrey

Quote:

Originally Posted by MEGALADON

Where can I get O2 bung's to weld into the headers??

Summit sell reducers with a bung in them for a sensor. I got a pair for my Dynomax headers (3" collector, 2 1/2" pipe) & stuck my stock sensor in there. I was expecting problems with the sensor cooling off at idle but it woks fine. Other people have needed to use a heated sensor as theirs cooled down too much at idle. Maybe it's due to my "hot" L81 engine?

The collectors come as a pair, so you can have a sensor in each side. They're tucked away in the Summit catalogue (& website) & might take some searching, but somebody has bought a pair this year so chances are they're still available.

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