So, I have a 2015 2.2 115k miles with what I thought was the normal gasket issue. Coolant overflowing through the expansion tank and spraying across the engine. So, started the process of stripping down and have inspected the gasket, which looks to be ok, no warping on the head… now I’m stuck. What to do next. I will change the gasket anyway, but am I missing anything else? What else could be causing the coolant/gasses through the coolant? Any help would be gratefully received.