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For an Austin-Healey the main purpose of the thermostat is to help the =
engine warm up faster by staying closed and allowing the coolant to =
reach a higher temperature faster. That said, the thermostat will =
gradually open as the coolant reaches the thermostats full open =
temperature. So, if you drive in a colder climate, you might want a =
thermostat with a higher opening temperature, say 180, in a warmer =
climate you might want the 160 or 165. I think I have a 160 in my car =
and it is fully warmed up and running without the choke engaged when the =
temperature gauge reads 190.
=20
John Spaur
=E2=80=9962 BT7
=20
From: Healeys <healeys-bounces@autox.team.net> On Behalf Of Richard =
Antal via Healeys
Sent: Wednesday, September 17, 2025 11:33 AM
Subject: [Healeys] radiator thermostat
=20
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
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class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>For an =
Austin-Healey the main purpose of the thermostat is to help the engine =
warm up faster by staying closed and allowing the coolant to reach a =
higher temperature faster. That said, the thermostat will gradually open =
as the coolant reaches the thermostats full open temperature. So, if you =
drive in a colder climate, you might want a thermostat with a higher =
opening temperature, say 180, in a warmer climate you might want the 160 =
or 165. I think I have a 160 in my car and it is fully warmed up and =
running without the choke engaged when the temperature gauge reads =
190.<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 =
Spaur<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>=E2=80=9962 =
BT7<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><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>Richard Antal via Healeys<br><b>Sent:</b> Wednesday, September 17, =
2025 11:33 AM<br><b>To:</b> Healeys <a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>s<br><b>=
Subject:</b> [Healeys] radiator =
thermostat<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><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></body></html>
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