On 2 occasions, my wife reported a massive cloud of steam coming from under the front of the fan, both time after a cold start-up and idle of approx 15 min to an hour. It appeared (I was unable to see this happen myself, and wife's description was less than helpful) that it may have "boiled over" and ejected the coolant through the reservoir, running down over the exhaust pipe.
What could cause this? One suggestion was a sticking thermostat, any other ideas or confirmations? I really can't afford a trip to the garage for trial and error, and I can change a thermostat myself.
Thank you all...