I’m not a car guy. I want to be. I’m learning. I learn by making friends with mechanics and absorbing their information. I had a car a few months ago with some overheating issues. (Got it resolved. No water in my coolant at all, using straight concentrate in a brand new, empty radiator, like a dingus. 🤦🏼♂️) But before I fixed it, someone said it might have been the thermostat. I asked a mechanic friend of mine about it. (I haven’t known him long.) He told me he’s been a mechanic for right around a decade and has NEVER seen a thermostat issue cause overheating. Is he just totally out of touch? Or did I misunderstand how the cooling system of a vehicle works? Let me know.
you don’t see it as much as you use to. that could be from design changes. I used to see thermostats cause over heating all the time. being lazy to open or never opening all the way or just plain never opening. Not I can’t speak for every thermostat on the market today, but I do know many manufactures have switched to Failsafe thermostats where if something in the cooling system fails, even the thermostat, It will lock in the open position. this hasn’t always been the case, and I’m sure there are still some cars out there where this can happen. tell him Never say never.