My diesel Citroen Synergie (51 reg) has developed a nasty (expensive) sounding rattle from the top end (cambelt end of the engine) that appears at about 3000 rpm. It's quite harsh and clattery.
It's going to the doctor's tomorrow but I was wondering if there are any common failings on this engine that might be producing such a rattle (and is it indeed going to be expensive as I fear)?
The car is otherwise going well and cruises quietly (as long as I keep the revs down).
Tim