I'm in the middle fo the second time of this happening. The first time, I thought it was a just a leak, but the mechanic said the radiator held no pressure and he ended up having to tear apart half my engine to get at it. The truck ran perfect for the next week and then when i got home one night, it noticed smoke pouring from underneath the hood. I looked and there was antifreez spraying from various places in the engine. Pain in the ass. Any help would be great.