Well a few weeks ago my car was running hot. The cause was my water pump went out and my thermostat was stuck. So I got a water pump kit and thermostat and changed it out. I also flushed out my radiator so everything should work nicely. Went out for a test drive and my car was still running hot. Temp guage was still hitting Hot. Then all of a sudden my reservoir started thumping like a bass drum. I went back into my yard and air was blowing and spitting out all my fresh radiator fluid. Now I'm clueless on what's the issue. Anyone had this same problem? The temp guage stays in the middle when it's just idling. The oil is fine with a dodge certified oil filter.