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Discussion Starter #1
I need to replace the O2 sensor at the catalytic converter. Problem is the nuts are really badly corroded and won't be reusable.


Anybody know what size I need to get to replace them. They appear to have been 12mm.


Thanks,
 

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12mm sounds about right. All the exhaust bolts are rusted tight on the 98 i'm working on.
Just cut them off with abrasive disk grinder, at the nuts. Be sure to wear gloves and eye protection.

I worked on a volvo recently, the o2 sensor would not come out until I used a cutting torch to get it red hot, then it just unscrewed like butter.
 

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Discussion Starter #3
Thanks.


Don't happen to know the pitch do you?
 
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