I had posted a week or so ago about my truck violently blowing coolant into the overflow container after a 200 mile trip towing. Since then I replaced the TSTAT with the factory 195 deg. one, and the radiator cap, and the fluid. I dont have coolant blowing out of the overflow drastically but today it was hot here, and I took it on a 20 mile trip, when I got home the truck smelled like coolant, it was goin into the coolant res but not fiercly, and it didnt overflow, I changed my coolant last week and no oil in it, I also did my oil and no coolant in it. Today also I noticed a boiling sound in the upper radiator hose after this short trip when I got home, any ideas, bad water pump? I replaced everything under the hood less than 5000 miles ago, including a rebuilt engine install. It runs great just this boiling thing goin on. Its a 351W.