I am new to this forum and I need your help. I have owned this truck for about 5 years. I had a rebuilt engine put in about 4 years ago and I have had no real problems with it. About a month ago, it started getting hot and forcing coolant out where my hose was connected. I replaced the hose, still the same. I replaced the thermostat, still the same. I bought a new radiator cap, still the same. I just put in some flush that I got from Summit Racing and I let it run for about 15 minutes revving the engine a little and then I took it for a very short ride, still the same. The only place I see leaking is where it is blowing by my hose clamp. What is strange about it to me, is that it is building up a lot of high pressure. The truck has been sitting for about an hour and the radiator hose is rock hard. I have never had this problem before in any of my vehicles. Thanks!