I have a 2002 C5 2ltr HPI Exclusive SE which I have had from new. Although the engine was noisy from new I was told that there's no problem, it seems to now be more noisy and when cold it ticks over like a diesel. As far as I can tell the noise seems to come from the the engine and sounds as if the tappets need ajusting but these I believe are hyd type. Has anyone had this problem and did you get it fixed? regards Marshy