I have a 5 speed 1999 BMW 323i with 82,000 miles on it. I just drove 800 miles in two days and the Temp gauge read normal all the way. Today 8 minutes into my drive the gauge went to red and stayed there. No steam, no funny sounds from the engine....do I have a defective gauge. I had the radiator pressure checked and they said everything was looking good and ready for the winter here in Maine. I opened the hood and all the hoses look fine, the fan was purring and no unusual heat..... so what is up?
