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Hi Herold,
=20
I am puzzled by your statement that a thermostat can maintain a coolant =
temperature of + 20 degrees. Once a thermostat has opened at its set =
temperature, at least for our 1950=E2=80=99s engine technology, I =
believe the thermostat cannot regulate the coolant temperature unless =
the operating conditions of the engine are radically changed because the =
coolant temperature would be regulated by the air flow through the =
radiator. To put it another way, once the thermostat is fully open the =
coolant temperature is regulated by the radiator, if the thermostat were =
to close the coolant temperature would be regulated by the engine =
temperature which could only be higher because of the combustion =
temperatures.=20
=20
John
=20
From: Healeys <healeys-bounces@autox.team.net> On Behalf Of Harold =
Manifold
Sent: Wednesday, September 17, 2025 1:52 PM
To: Richard Mayor <boyracer466@gmail.com>
Cc: Richard Antal <rantal243@yahoo.com>; Healeys =
<healeys@autox.team.net>
Subject: Re: [Healeys] radiator thermostat
=20
Hi All,
=20
Thermostats always generate interesting discussions.
=20
I use a 180-degree thermostat in my car. However, what's equally =
important is how effectively the thermostat regulates the coolant =
temperature. A thermostat that is fully closed or fully open is no =
longer actively controlling the temperature. The normal operating range =
is typically the opening temperature plus 20 degrees. For example, a =
165-degree thermostat should maintain the temperature between 165 and =
185 degrees, while a 180-degree thermostat should keep it between 180 =
and 200 degrees.
=20
If your current thermostat maintains the coolant temperature within its =
specified range under normal driving conditions, then it's the correct =
one for your needs.
=20
Harold
=20
On Wed, Sep 17, 2025 at 1:36=E2=80=AFPM Richard Mayor =
165 is too cold for good running. Our engines run better in the 180 to =
190 range. =20
=20
=20
Sent from my iPad
On Sep 17, 2025, at 12:13=E2=80=AFPM, Robert Markovich via Healeys =
=EF=BB=BF 165 is the one I use
=
<https://aolapp.onelink.me/eG2g?pid=3DNativePlacement&c=3DUS_Acquisition_=
YMktg_320_EmailSignature_AttributionDL&af_sub1=3DAcquisition&af_sub2=3DUS=
_YMktg&af_sub3=3D&af_sub4=3D100002473&af_sub5=3DSentFromNewAOLApp__Inters=
titial_&af_ios_store_cpp=3Dce85ce34-ad0f-4811-a92b-a172743b064e&af_androi=
d_url=3Dhttps%3A%2F%2Fplay.google.com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom=
.aol.mobile.aolapp%26listing%3Demail_signature_attribution> Sent from =
the all new AOL app for iOS
=20
On Wednesday, September 17, 2025, 2:50 PM, Richard Antal via Healeys =
Gents,
What is the desired coolant temperature for optimal engine =
performance? I've searched the tech articles and can find nothing that =
specifically answers that question. This summer my BJ8 seemed to run =
fine with a 160 thermostat which, according to the gauge which I've =
checked and found to be accurate, kept the coolant at around 165. Thanks =
to all who respond.
rich antal
_______________________________________________
Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
http://autox.team.net/mailman/listinfo/healeys
http://autox.team.net/mailman/options/healeys/rmarkovich@aol.com
_______________________________________________
Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
http://autox.team.net/mailman/listinfo/healeys
http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com
_______________________________________________
Archive: http://www.team.net/pipermail/healeys =
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Hi =
Herold,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>I am puzzled =
by your statement that a thermostat can maintain a coolant temperature =
of <u>+</u> 20 degrees. Once a thermostat has opened at its set =
temperature, at least for our 1950=E2=80=99s engine technology, I =
believe the thermostat cannot regulate the coolant temperature unless =
the operating conditions of the engine are radically changed because the =
coolant temperature would be regulated by the air flow through the =
radiator. To put it another way, once the thermostat is fully open the =
coolant temperature is regulated by the radiator, if the thermostat were =
to close the coolant temperature would be regulated by the engine =
temperature which could only be higher because of the combustion =
temperatures. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>John<o:p></o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
Healeys <healeys-bounces@autox.team.net> <b>On Behalf Of =
</b>Harold Manifold<br><b>Sent:</b> Wednesday, September 17, 2025 1:52 =
PM<br><b>To:</b> Richard Mayor =
<boyracer466@gmail.com><br><b>Cc:</b> Richard Antal =
<rantal243@yahoo.com>; Healeys =
<healeys@autox.team.net><br><b>Subject:</b> Re: [Healeys] radiator =
thermostat<o:p></o:p></span></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p class=3DMsoNormal>Hi =
All,<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>Thermostats always generate interesting =
discussions.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p class=3DMsoNormal>I =
use a 180-degree thermostat in my car. However, what's equally important =
is how effectively the thermostat regulates the coolant temperature. A =
thermostat that is fully closed or fully open is no longer actively =
controlling the temperature. The normal operating range is typically the =
opening temperature plus 20 degrees. For example, a 165-degree =
thermostat should maintain the temperature between 165 and 185 degrees, =
while a 180-degree thermostat should keep it between 180 and 200 =
degrees.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>If your current thermostat maintains the coolant =
temperature within its specified range under normal driving conditions, =
then it's the correct one for your needs.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>Harold<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p class=3DMsoNormal>On =
Wed, Sep 17, 2025 at 1:36<span =
style=3D'font-family:"Arial",sans-serif'>=E2=80=AF</span>PM Richard =
Mayor <<a =
href=3D"mailto:boyracer466@gmail.com";>boyracer466@gmail.com</a>> =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=3DMsoNormal>165 =
is too cold for good running. Our engines run better in the 180 to =
190 range. <o:p></o:p></p><div><p =
class=3DMsoNormal> <o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p =
class=3DMsoNormal>Sent from my iPad<o:p></o:p></p></div><div><p =
class=3DMsoNormal><br><br><o:p></o:p></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>On Sep 17, 2025, at 12:13<span =
style=3D'font-family:"Arial",sans-serif'>=E2=80=AF</span>PM, Robert =
Markovich via Healeys <<a href=3D"mailto:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</a>> =
wrote:<o:p></o:p></p></blockquote></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-family:"Tahoma",sans-serif'>=EF=BB=BF</span> 165 is the =
one I use<br><br><o:p></o:p></p><div><p class=3DMsoNormal><a =
href=3D"https://aolapp.onelink.me/eG2g?pid=3DNativePlacement&c=3DUS_A=
cquisition_YMktg_320_EmailSignature_AttributionDL&af_sub1=3DAcquisiti=
on&af_sub2=3DUS_YMktg&af_sub3=3D&af_sub4=3D100002473&af_s=
ub5=3DSentFromNewAOLApp__Interstitial_&af_ios_store_cpp=3Dce85ce34-ad=
0f-4811-a92b-a172743b064e&af_android_url=3Dhttps%3A%2F%2Fplay.google.=
com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.aol.mobile.aolapp%26listing%3Dema=
il_signature_attribution" target=3D"_blank"><span =
style=3D'font-size:9.0pt'>Sent from the all new AOL app for =
iOS</span></a><o:p></o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><p style=3D'margin-top:0in'><span =
style=3D'font-size:11.5pt;color:#8473FF'>On Wednesday, September 17, =
2025, 2:50 PM, Richard Antal via Healeys <<a =
href=3D"mailto:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</a>> =
wrote:<o:p></o:p></span></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div =
id=3D"m_3862331438548245316yiv6324880639"><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica",sans-serif'>Gents,<o:p>=
</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica",sans-serif'> =
What is the desired coolant temperature for optimal engine =
performance? I've searched the tech articles and can find nothing that =
specifically answers that question. This summer my BJ8 seemed to run =
fine with a 160 thermostat which, according to the gauge which I've =
checked and found to be accurate, kept the coolant at around 165. Thanks =
to all who respond.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Helvetica",sans-serif'>rich =
antal<o:p></o:p></span></p></div></div></div></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>__________________________________________=
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_______________________________________________
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