hi guyz i recently did a head gasket job on my van and noticed that the upper radiator hose would INFLATE really big while running then after it would cool down the hose would colapse flat like a pancake?? also when it was cooled off if i took the radiator cap off it would let off a lot of pressure?? well the hose let go this afternoon and now i,m looking for a new one to put in. can anybody give me an idea whats going on with my cooling system. after i log out i gotta order a new upper hose and a new cap and a new thermostat. thanx for reading my problem. joe g