I’ve got a V6 Mountaineer with about 90K miles on it. It has always been very reliable. With the outside tempature dropping I noticed that my heater has not been working as well as it has in years past. Now, my engine is running much hotter than usual and I have had to add coolant 2 times in the last two weeks. Any suggestions…
yeah, get your cooling system checked out pronto.
First-guess ossibilities are a stuck thermostat, a clogged system (radiator), a leak, or a bad radiator cap.
Do not fool with this. Overheating can destroy an engine.