My last car was an Ecoboost 1.0 Ford Fiesta and as an Engineer I was always aware that cooling on this engine was critical. It was not like the engines in the old days which I remember driving when overheating until I got the car home for repairs.
The Ecoboost engine block is about the size of A4 sheet of paper cubed, no coolant, bye bye engine in short order.
I can't get over the price of the engine, £5000 plus.