By now, you all know how hot my car is, right?
Well, today it really was.
The cooling system has always run really nicely on the car, and is pretty much up to the task of spirited driving. Dual-core metal radiator, new water pump ~10k miles ago, new coolant/water about ~200 miles ago, etc. Everything looks and works well. The car's been driven hard with no problems.
Then today it went for emissions, and while Beth was waiting in line with it, the temp gauge hit "H", and the contents of the radiator ended up in the overflow tank.
According to the guy at VEIP, the upper hose was hot, the radiator was cool, and whatever was in the overflow tank was boiling. His diagnosis was a bad thermostat.
They filled the radiator with straight water, put the radiator cap back on, and Beth drove it back to work with no problems.
So since I have to troubleshoot this when she gets home, does anyone have any ideas what I should look for?