i am running a noss pro trixx head, i just had the motor appart to put new base gaskets in, i thought that might have been some of my problem, but nothing changed... the steam vent isnt cloged at all. engine runs awesome just overheats here and there... ill be ripping through the woods and all the sudden slow down to go around some tight bends and trees and i will start to smell antifrez and look down and my pipes are a litle steamy...