I installed a Wraptor serpentine belt and accessories system in my 440 6bbl 70 Roadrunner last year. Dakota Digital gauge system. I had to install and remove my Cold Case radiator about 6 times because of a defective electric fan motor, and to fit the largest flex fan I could, as well as install 2 Spahl 10" fans, that finally work reliably w/out burning up. Anyway, I recycled the antifreeze just about every time because it was new, like not even a day in use. My luck, once I had the combo of fans that worked, I developed a problem. Most often when I am first running the engine, it will spike the temp gauge, to impossible high numbers, sometimes as high as the max temp of 350° I have a Stant Premium thermostat, but I just removed it to take that variable out of the equation. NOTE: I say "impossible" high temperature readings, but I'm concerned it could be STEAM that is making the temp gauge spike. Once the engine is revved up, either stationary or from driving, the temperature gauge quickly goes to a temperature I'd expect, 180 w/T stat installed, and around 145 with it removed. So when I removed the thermostat, I also ran the heater, thinking I could get any trapped air out of the cooling system. The temperature went high again, I was squeezing the top radiator hose and the 2 heater hoses, to get air out, check for firmness via pressure, etc. I turned the engine off. The top hose and top 1/2 of the radiator was hot, but the bottom half was only warm, barely, and I could hold my hand on it. I then heard a "gurgle" sound like an air pocket moved, and the bottom of the radiator immediately came to the same expected hot temperature and the gauge read in the expected range. So, how can I fix this, and what do you suspect the problem is?