[Healeys] Auxiliary electric fan

[richard mayor]

What is the down side of running a 165 degree thermostat?  Is your engine
not running at optimum efficiency?  I have been led to believe that an
engine's optimum running temperature is somewhere around 185 - 190 degrees.

On Wed, Jul 21, 2021 at 6:07 PM Alan Seigrist via Healeys <
healeys at autox.team.net> wrote:

> Kees -
>
> Living in hot and tropical climates like I have, I can confirm that using
> cooler thermostats helps a great deal to reduce heat spikes in traffic, as
> there is significantly less heat energy stored in the coolant at 165F vs
> 180F.  That combined with a well sorted system will be sufficient to give
> you a few more minutes at idle than if you were running a 180 or 190F
> thermostat on a very hot day.
>
> You are correct it technically will not prevent overheating, but it will
> postpone it long enough until you get driving again.
>
> Best,
>
> Alan
>
> On Wed, Jul 21, 2021 at 5:48 PM Kees Oudesluijs <coudesluijs at upcmail.nl>
> wrote:
>
>> A thermostat with a lower opening temperature does not prevent
>> overheating. It may buy you some time before the engine overheats but if
>> you are long enough in a traffic jam it will overheat eventually. A more
>> powerful fixed fan may alleviate the problem a bit but the only real
>> solution will be a properly installed electric fan.
>>
>> I have done this from the sixties on all my cars that had a fixed fan.
>> However even in those days many of the more powerful cars were already
>> equipped with thermostatically controlled radiator fans.
>>
>> An electric fan does not solve overheating because of other issues like a
>> dirty or blocked radiator, silted up engine, faulty cowling etc.
>>
>>
>> Kees Oudesluijs
>>
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