This may interest peeps with a similar problem, look up my old post, Xantia 1.9td turbo change.
My back up Xantia for the last 2 years has a leaking pump so it was time to resurrect the old un. I managed to source a 2nd hand turbo and yesterday it flew through the mot with no smoke issues. A bit of a pig to change but worth it in the end. Long live the Xant
Xantia no longer smokes
Moderator: RichardW