4M overheating on freeway driving?

[rebuilder86]

open her up, new headgasket, and while ur there pbysically clean out all the coolant channels and specifically the jackets around the cylinders so that there is nothing to come loose and block ur radiator.
else, i have had permanent success with sealup copper cooling system sealer. It has completely fixed 2 major blown head gaskets for me. its a bit dodgy tho, as u have now experienced.

of course all this advice should be completely disregarded if the cause of this last overheating was simply the split coolant tube leaking all the coolant haha.