u/Flat_Barber_7501

Thank you for taking the time to read my post.

On a 2015 Ford Transit Connect 1.6l ecoboost the coolant starts to bubble once the car reaches a certain temperature and it gets pressurized well above the max line and starts dripping out of the vent hole. My temperature needle is at the mid mark and it’s not overheating. Lately I start the day with the coolant below the minimum line, I’ll add just enough to get me in between the minimum and maximum line, then it’ll bubble and pressurize and loose coolant and it’s a repeating process. My family mechanic replaced the radiator but it did not fix the problem. Any pointers as to what can it be?
We also did a sniff test with the dye and it never turned any color beside blue.