Message text written by Trevor Boicey
> However, the water pump in an engine is turning all the time. It
>might actually work out to LESS resistance to have the water flowing
>with the pump than to have the pump continuously working against
>an obstruction and having the impellers churning in the fluid.
--- I agree completely. You make an excellent point. I was not really
thinking clearly about the instance of automotive application, and
I should have considered the fact that the pump runs at engine speed.
If the thermostat is obstructing flow, then it would cause more pumping
losses. To a certain extent it does not obstruct _that_ much flow as
it really acts as a diverter-mixer valve.
> I'm just opening this can, I'm not going down that road. ;>
>> P.S. There can be TOO much cooling. There is an optimum
>> operating temperature of an engine.
> The thermostat (if installed) takes care of this however. If
>the engine is running too cool, then the circuit to the radiator
>is blocked.
<
---- Right, if installed. I had thought we were discussing the case of
a removed thermostat, where there would be no control of the temp.
The 'stat is not really all that important except in cool weather and
during warmup.
-Tony
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