[Bluebell]

G.M. My point to you, was about the purpose of thermostats.
In particular, where they related to Henry Fords Flathead V8s, from the day he built the first one, that was designed to have thermostats. (after all he was determined (for a while) to have NO waterpumps and NO oil pump,in his V8) I'm not sure how he viewed thermostats, early on.

Your point about the thermostat keeping the temperature up, was a good point, that some people need to be aware of. It is however, only a part of the function.

I was referring to the non pressured era, however included the info for the pressure systems, for those guys, that were worried about running "too hot"

Good info in your previous post. Thankyou.