Two months ago I've replaced my old 180 degree thermostat with a new 195 degree one, but since yesterday it seems already broken. The temp of the engine is much lower since yesterday and the heater doesn't become so warm anymore.
So, what could have caused this?
My guess is that I need a new thermostat. Should I buy a 195 degree one again? Or a 180 one?
I have a '91 Caprice 305.