i saw a post saying that the valve cover gasket leak leads eventually to a thermostat housing leak well mine has come to that.... i see the gasket is under $30 to buy and had mine out today to clean around and check it out. its just old i guess. my therm. housing leaks off and on sometimes bad. i dont know much about the housing but i was wondering if its expensive to repair by myself? i see all the bolts for removal i can handle all that its easy but is it going to need a whole new housing or is it most likely a gasket, or something smaller?