Got two notices from ford, one for the cylinder head and the other for the door latch. The notices say they will be replacing the cylinder head once they have them build around 3rd quarter. The latch said anytime. Mine is classified as a 2014 but was purchased in Nov of 2013. Currently I'm at 175,353 miles so I'm pretty stoked about a new head. I'm contemplating rebuilding the motor at the same time, I just haven't decided yet. I still have not had any issues, but with upgrading to the x-47, and the mileage I am certain the piston rings would be screaming but I am not putting out any weird smoke and the CO2 levels are still good. I wouldn't mind buying the motor from DHM but he is talking like 4 months to get it built. The last motor I had build took a week, so I am not sure what that is all about. I could just get the motor from Puma but then you have to deal with shipping and VAT.
As for the coolant. I didn't have any leaks in the first 100,000 miles and never added any coolant. Temps never budged on gauges. At 100,000, drained all coolant and replaced with ford coolant. So another 75K and no leaks, same factory hoses which I have not replaced, but will replace when they replace the head.
If your low enough on coolant for the head to overheat and catch fire, your not paying attention. You have a temp gauge right in front of you. If it moves to 5 blocks, You know you have problem well before it was an issue and you would know it about 15 minutes sitting idle. I've never had my coolant hoses off the car. As I have said many many times, I still think this car was some kind of prototype from Ford. I have never had a car go this far, without something going sideways. A clutch, coolant hoses, serpentine belt, plug wires, something, but not this car. as I have said also, the only gripe I had with the car from the factory was the brakes and I resolved that with the wildwood.
I have started to notice a leak coming from the oil pan, now check this out, I went to Ford the other day to ask about changing out the coolant hoses and belt when they do the head, and asked, can I order the oil pan gasket. They said, they couldn't find the part. Then said, they weren't even sure my car had an oil pan gasket. You would think that was something they would know. But according to them, they have never replaced a oil pan gasket on a fiesta st.
Update, it doesn't use a gasket, it uses RTV.