This goes out to all of you who gave me advice on removing this pain in the a**e object. Thanks I took a bit of everyones help. Soakes the sensor in penitrating oil, and went out Bought a new 22mm ring spanner as long as I could get. New gas bottle for my blow torch and some other bits. Got straight under the car when I got home Blow torched the sensor til it was red hot slipped on the spanner and gave it a bash with the hammer, and it turned first time ;-) I don't know if it was one or all processes that worked but its done now. This is the first time since I got the car that it has had a working O2 sensor. At first the engine was a nightmare, wouldn't idle and was trying to stall under accelleration, after maybe 5mins it settled down and is fine now, and on top of that the petrol smell has gone from the exhust which is what I was hoping for. Thanks again Paul #6463 [Non-text portions of this message have been removed]