Hi Firstly welcome to the site Spannerwrench. was the turbo changed to cure the smoking? also incorrect timing will cause smoke, was the engine smoking before these changes. Valve stem seals can also cause this. When you rev the engine up does it sound smooth ie, no misfire does it tickover evenly, the juddering may not be engine related, is it manual or automatic? Thanks for the rapid response, in answer to your questions: Turbo: Dont know, I believe it was changed as it had failed and the cambelt was done at the same time. The guy I bought it off was a trader and said he had been going to Portsmouth in it for the the last few weeks, he didn't mention the smoke (surprisingly enough!!) Engine Sound: No misfires and sounds smooth. It ticks over evenly. Juddering: Auto gearbox. I took it for a spin last night and didn't notice the smoke although I didnt take it out for long. I gave it a good boot (which usually starts the smoking) and saw none but it could do with a longer run I think. I'll try again tonight. You mentioned stem seals? Is that something thats gonna cost or is it a fairly simple replacement? Thanks again. :(