Re: Engine Thermostats - Old vs. New

Posted by TxGoat On 2023/10/6 8:53:48

As I understand it, the temperature rating of a thermostat is based on the temperature at which the valve STARTS to open. Full opening would probably occur at some higher temperature. I suspect that automotive thermostats are plus/minus 5 to 10% of spec. I have a 2008 Chevrolet V8 that quickly reaches 210F on the gauge and stays there, in any weather under any operating conditions. (Unless the fans fail to operate) I don't think is uses a traditional thermostat.