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DIY : Downstream Oxygen O2 Sensor replacement

139K views 73 replies 32 participants last post by  Daijoubu 
Interesting ...
Generally, when this procedure is described, an anti-seize compound is recommended for the threads prior to re-assembly .... so that it won't require so much effort to unscrew in the future.
Something along the line of the following item:
http://news.thomasnet.com/fullstory/28214/1083
... Sounds like there wasn't any of this compound applied during the original installation.
 
"If you use a new sensor it will already have anti seize on it, but my understanding is that it doesn't make much of a difference."

.... When mine goes out, I might try using 'extra' anti-seize, in addition to that applied by the manufacturer.
.... Could be that high temperature exhaust duty, after so many miles, is just too much for any thread compound, other than 'rust', to be effective.
 
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