Thermostat thread

[Archerfish]

we don't. because we humans can't.
that's why the temp gauge is there.

when the thermostat is closed (cold engine), the radiator coolant level is... level.
when the thermostat opens up (when engine gets hot), coolant level will either get higher (if the water pump is pushing coolant up into the radiator), or lower (if the water pump is sucking coolant away from the radiator).

Yes, however, *Stockengine mentioned that one of the symptoms of a failing thermostat is when the engine is warmer than usual, that is, when the temperature gauge is not moving.

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Symptoms: Engine is warmer than normal, Temp gauge didnt move.

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FOCUS

Or he is referring to another temperature gauge that I'm not familiar with.

Kindly confirm if my understanding is correct about coolant level. If the thermostat is no longer working properly, in example, not opening, then the coolant level will decrease because it will reach the boiling point and evaporate.