I noticed today that the radiator is constantly cycling water through the overflow container at a high rate. \n\npulled the radiator cap and started the engine and had a tremendous amount of pressure pushing coolant back out of the radiator.\n\nI know this is a sign of a bad head gasket or a cracked block, but I would think with this much pressure I would have some overheating which I dont.\n\nIs this an issue like I am thinking it is, or am I not understanding something that is different about the titan cooling system. \n\nI just got the truck used. and it had some engine problems that were hidden from me at the dealer. Is this another to add to the list, or is this normal?