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this sort of failure could not have been picked up with a routine service
for a sudden water jacket leak to occur then its likely the engine was corroding from the inside due to low anti-freeze levels
however the life of the coolant is meant to be 10 years so I'd say its well worth getting in touch with Ford customer service and enquiring further
I would argue that as the failure was coolant related which is a non service item then yes they have some responsibility
you will probably be more successful trying to get a contribution towards the repair than trying to recover the whole cost
understood good luck