I have a 2014 Fiesta ST. Took my car in for the overheating sensor recall, 2 weeks later my cylinder 1 is leaking coolant. Ford tells me that because I have aftermarket parts (cobb) and downpipe. That it is not their problem. Now I'm faced with a new head repair. $4500.00 cdn. What to do? 60,000k on it's second engine now. Should I find an alternative engine? Is there such a thing?