BigWaveDave
Gold Member
- Joined
- Nov 22, 2013
- Messages
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- Mountain Maryland
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- Detector(s) used
- Garrett AT Pro, AT Max, Minelab
Equinox 800
- Primary Interest:
- Metal Detecting


The obvious difference that it isn't a thermstate is that it would have a passageway for coolant to flow. I know that little cylinder button looking thing looks similar to one on a themstate in the cooling system of an internal combustion engine, that button holds temperature sensitive wax that control the opening of the thermstate.
See at this link:
Thermostat - How Car Cooling Systems Work
View attachment 1160050

It is the actuator or closing piece of a T stat. Someone dissected this.
Did the AT pro find that?..lol
fluid does not have to flow through an automotive thermostat.it simply has to contact it with heat causing contraction and the unit itself sealing an opening(cold)or retracting form the opening(hot)
this is my understanding.I'm still with thermostat or prank hand buzzer(love that one)