I tried this post on my project log. Gonna try it here hopefully get a reply. I have a problem with the coolant overflowing. Engine is not getting hot. Stays @ 180^. Engine is 2.5L hybrid, running the mopar mls gasket/sealant. Only when I hit high boost (18+psi) it will puke coolant into the catch can. If boost is on low setting(10psi) it's fine. Switch to high boost, hit it for a couple of seconds, pull over, has excess coolant in the catch can. I think the mls gasket is leaking cylinder pressure into the coolant. Any ideas?