first of all i would like to say thanks for all the replys,
as you all know buying a ///M car can be stress full

,
the engine has been rebuilt at 68k and the now miliege and is at 74k with full documented main dealer history yet to be comfirmed and viewed,
the seller had explaned why the work was carried out,
"the vanos had failed and broken off a piece and had fallen into to chain and snaped it",
he said both vanos had failed.
now i will be HPI checking it and ringing bmw to see if there is any truth to hes story, it is the week end here in the uk and my contact at bmw had a day off i could of called another dealer but i wanted a proper report to what has been done and need to wait till monday i just dont want to be stuck with a car that is hard to sell if and when the time comes i really cant afford to hit and miss as you all know if something goes wrong it wont be a cheap fix and i would need to remortgage LoL