Changed thermostat, petcock, and coolant two weeks ago. ( Didn't burp). No problem at all. Changed oil this weekend, drove all weekend. Let her rest Monday and Tuesday, go outside to put my mirrors back on her and notice a dinner plate size of fluid on the ground. After inspection I noticed it was dripping down the drive belt. I opened the radiator cap and coolant popped out about two inches high. I performed a burp of the coolant system. The overflow tank stays around the low line. Was not burping it the problem? Should I look in other areas?