[Healeys] Auxiliary electric fan

Alan Seigrist healey.nut at gmail.com
Thu Jul 22 18:54:48 MDT 2021

Honestly I have never found a downside to it.  Actually my experience is at
190 some stuff gets loose on the car, so at 165 stuff seems to run better.
180 works okay but I prefer to have a wide mouth thermostat like the
Waller, then that's okay too.

On Fri, Jul 23, 2021 at 5:51 AM richard mayor <boyracer466 at gmail.com> wrote:

> 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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