Alright alright you guys, you've convinced me (lol).
Agreed I should wait a little bit and see whether there's any evidence to back up the prediction of an untimely demise. The diagnosis did come from a professional but I suppose they might have it wrong.
I did think it odd that a diesel motor could have a fundamental weakness like this, since they need to be built strong to work at all. Also since the coolant is a ten-year service item, and I've never noticed it was getting low or had to top it up since I've owned the vehicle, it's either only leaked a minute amount or is not actually leaking at all.
The advice I've gotten from some who claim to know is I ought to just get rid of the black sheep. It's lucky we don't rely on experts or everyone might believe that Powershifts are going to grenade on you and Fords retain no resale value
