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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@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@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@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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Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">Honestly I have never found a downside to it.=C2=A0 Actual=
ly my experience is at 190 some stuff gets loose on the car, so at 165 stuf=
f seems to run better.=C2=A0 180 works okay but I prefer to have a wide mou=
th thermostat like the Waller, then that's okay too.</div><br><div clas=
s=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Jul 23, 202=
1 at 5:51 AM richard mayor <<a href=3D"mailto:boyracer466@gmail.com";>boy=
racer466@gmail.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex"><div dir=3D"ltr">What is the down side of running a 165 d=
egree thermostat?=C2=A0 Is your engine not running at optimum efficiency?=
=C2=A0 I have been led to believe that an engine's optimum running temp=
erature is somewhere around 185 - 190 degrees.<br></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jul 21, 2021 at 6=
:07 PM Alan Seigrist via Healeys <<a href=3D"mailto:healeys@autox.team.n=
et" target=3D"_blank">healeys@autox.team.net</a>> wrote:<br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Kees -<div><br=
></div><div>Living in hot and tropical climates like I have, I can confirm =
that using cooler thermostats helps a great deal=C2=A0to reduce heat spikes=
in traffic, as there is significantly less heat energy stored in the coola=
nt at 165F vs 180F.=C2=A0 That combined with a well sorted system will be s=
ufficient to give you a few more minutes at idle than if you were running a=
180 or 190F thermostat on a very hot day.</div><div><br></div><div>You are=
correct it technically will not prevent overheating, but it will postpone =
it long enough until you get driving again.</div><div><br></div><div>Best,<=
/div><div><br></div><div>Alan</div></div><br><div class=3D"gmail_quote"><di=
v dir=3D"ltr" class=3D"gmail_attr">On Wed, Jul 21, 2021 at 5:48 PM Kees Oud=
esluijs <<a href=3D"mailto:coudesluijs@upcmail.nl"; target=3D"_blank">cou=
desluijs@upcmail.nl</a>> wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><u></u>
=20
<div><p>A thermostat with a lower opening temperature does not prevent over=
heating. It may buy you some time before the engine overheats but if you ar=
e 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.<br></p><p>I have done this from the s=
ixties 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 cont=
rolled radiator fans.<br></p><p>An electric fan does not solve overheating =
because of other issues like a dirty or blocked radiator, silted up engine,=
faulty cowling etc.<br></p><p><br></p><p>Kees Oudesluijs<br></p></div>
</blockquote></div>
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