We've been asked to give a second opinion on this vehicle, the problem is quite a major leak of clean diesel from around the injectors. The dealers have fitted (supposedly) new injectors and pipes but the leak is still there, they are saying it needs a new head! The problem is that it doesn't leak until you drive it at speed so no leaks are apparent in the workshop, I can't see how the head would be faulty as there are no fuel gallery's in it!
Anyone had the same problem?

Mark