Technical lambda sensor seized

[les1971]

hi,if any body had same problem and found a fix
my lamdba sensor has seized itself in the top of the exhuast manifold
i got a 22mm lambda sensor socket of ebay but all its done is rounded of the nut (have been spraying with wd40 for a week now,460ml can ,used full can). i also have tried heating the nut and then exhaust(2 separate try's over two days),i have now welded the socket to the nut (lambda sensor)and using a 2ft wrentch tried to turn with two 16 stone men trying and still will not move.....i have not welded the nut to the manifold so i am at a complete loss of what to try next

any ideas.....will take crazy ones...otherwise its a new manifold,unless someones got a secondhand one or knows what other manifold fit a petrol 20001 multi

 

[JTDman]

drill a new hole weld a nut of appropriate size fit new sensor there forget about the old one.

 

[dave]

remove pipe. hold sensor in a vice, turn pipe

 

[les1971]

hi jtdman....thats a very,very good idea,that really had not crossed my mind

hi dave,had though about taking out manifold as a last result

think there both are good ideas,will take off manifold and vice it,if that still fails will start drilling,(can drill it better out than in)will let you know how i get on,thanks guys