Ok just trying to verify somthing so this my sound rather dumb but here it goes. My truck was leaking antfreeze out of the thermostat housing(the gasket was toast)i fixed it temporary with rtv sealer for the summer worked mintuntil now my heat wasn't working b/c i was low on anti freeze so iadded some, heat came back, now the trucks leaking antifreeze there wasalso pressure in the radiator hose which there wasn't before i added the antifreeze. i dunno if its from the cold weather that the rtv sealer jsut isn't good enough or somthing major. So i'm jsut goin buy the gasket and thermostat housing hopefully that soloves it. any input would be nice thanks

 

May have a cracked thermostat housing. Your on the right track.

 

put sum silicon on your thermostat gasket to make a better seal. Dont tighten the bolts to hard or u'll snap the heads off (it happen to me, long story and it suckd.... ended with a welder......)