For some strange reason, my 620I has developed a circulation problem. If I putter or run 3/4 throttle, it circulates fine and the fan will kick in and out as it should. If I run it full bore for a few miles, the temp light will start flashing. The fan is running, but the radiator is cool. If I let it cool down some, and restart it will heat right back up. It takes a complete cool down to make it circulate properly again. I feel like it must be creating an air pocket in the water pump. Any ideas?:confused:
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