Jaguar XJ8

Hi I have a 1997 3.4 jaguar XJ8 with 87000 miles on the clock. There is a serious clanking noise coming from the engine which is worse at start up but is continous throughout operation. As of yet have not managed to get it into a dealer although several mechanics have had a look but do not have a clue. If you could point me in the right direction that would be great!
October 3, 2007.

The engine will have to be stripped down to locate the cause of the clanking.

Dave H
Nov 26, 2009.