> Running without a Thermostat
> John Lupien writes: ( about too-fast circulation of coolant leading to engine
> overheating )
> This is a myth...
> *** I tend to agree with John here. I believe, that the requirement for a
> thermostat body, or at least, a restrictor plate, is due to the type of pump
> our cars use.
> Essentially, a water pump is a rotating plate with short vanes on one side.
> I believe that one of the requirements for proper operation of these
> extremely simple pumps, is that it see a defined backpressure to work
>against.
Actually, unless the pump is cavitating, less back-pressure makes it more
efficient. Try the hair-dryer experiment - block the outlet, and note
how the motor speeds up. No air flow, but the motor is still pushing hard...
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John R. Lupien
lupienj@wal.hp.com
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