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Re: [Healeys] radiator thermostat

To: "'David Nock'" <healeydoc@sbcglobal.net>, "'Richard Mayor'" <boyracer466@gmail.com>, "'Robert Markovich'" <rmarkovich@aol.com>
Subject: Re: [Healeys] radiator thermostat
From: <m.g.sharp@sympatico.ca>
Date: Thu, 18 Sep 2025 12:24:27 -0400
Cc: 'Richard Antal' <rantal243@yahoo.com>, 'Healeys' <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <1458679789.4784944.1758136080533@mail.yahoo.com> <1BB88ADA-A551-4291-8BEA-6013F1F9E276@gmail.com> <ec725b6b-a1e5-4b3e-b3ae-d953261a74e8@sbcglobal.net>
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I have run one of BCS (David=E2=80=99s) sleeved 160 thermostats in my =
BT7 for decades and I works perfectly.

=20

Just say=E2=80=99n,

=20

Mirek

=20

From: Healeys <healeys-bounces@autox.team.net> On Behalf Of David Nock =
via Healeys
Sent: September 18, 2025 11:37 AM
To: Richard Mayor <boyracer466@gmail.com>; Robert Markovich =
<rmarkovich@aol.com>
Cc: Richard Antal <rantal243@yahoo.com>; Healeys =
<healeys@autox.team.net>
Subject: Re: [Healeys] radiator thermostat

=20

The thermostat does not control the high end temperature of the engine. =
Its job is to get the engine up to an operating temperature as soon as =
possible. Then in maintains the low end temperature of the engine. Once =
the thermostat is open the engine temperature is controlled by the =
radiator, radiator fan and air flow.

On the 6 cylinder engine there is a sleeve attached to the thermostat, =
that blocks off a bypass in the cylinder head. The bypass is there to =
allow the coolant to flow when the thermostat is closed. Once the =
thermostat is open the sleeve is there to block the bypass allowing ALL =
the coolant to flow thru the radiator.=20

David Nock

British Car Specialists

=20

On 9/17/2025 12:54 PM, Richard Mayor wrote:

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

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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





_______________________________________________
=20
Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
=20
http://autox.team.net/mailman/listinfo/healeys
=20
http://autox.team.net/mailman/options/healeys/healeydoc@sbcglobal.net
=20

--=20
David Nock
British Car Specialists
Stockton Ca =20
209 948 8767
www.britishcarspecialists.com <http://www.britishcarspecialists.com>=20

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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;mso-fareast-la=
nguage:EN-US'>I have run one of BCS (David=E2=80=99s) sleeved 160 =
thermostats in my BT7 for decades and I works =
perfectly.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'>Just say=E2=80=99n,<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'>Mirek<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys =
&lt;healeys-bounces@autox.team.net&gt; <b>On Behalf Of </b>David Nock =
via Healeys<br><b>Sent:</b> September 18, 2025 11:37 AM<br><b>To:</b> =
Richard Mayor &lt;boyracer466@gmail.com&gt;; Robert Markovich =
&lt;rmarkovich@aol.com&gt;<br><b>Cc:</b> Richard Antal =
&lt;rantal243@yahoo.com&gt;; Healeys =
&lt;healeys@autox.team.net&gt;<br><b>Subject:</b> Re: [Healeys] radiator =
thermostat<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p>The thermostat does not =
control the high end temperature of the engine. Its job is to get the =
engine up to an operating temperature as soon as possible. Then in =
maintains the low end temperature of the engine. Once the thermostat is =
open the engine temperature is controlled by the radiator, radiator fan =
and air flow.<o:p></o:p></p><p>On the 6 cylinder engine there is a =
sleeve attached to the thermostat, that blocks off a bypass in the =
cylinder head. The bypass is there to allow the coolant to flow when the =
thermostat is closed. Once the thermostat is open the sleeve is there to =
block the bypass allowing ALL the coolant to flow thru the =
radiator.&nbsp;<o:p></o:p></p><p>David Nock<o:p></o:p></p><p>British Car =
Specialists<o:p></o:p></p><p><o:p>&nbsp;</o:p></p><div><p =
class=3DMsoNormal>On 9/17/2025 12:54 PM, Richard Mayor =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal>165 =
is too cold for good running. &nbsp;Our engines run better in the 180 to =
190 range. &nbsp; <o:p></o:p></p><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</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";>&lt;healeys@autox.team.net&gt;</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&amp;c=3DUS_A=
cquisition_YMktg_320_EmailSignature_AttributionDL&amp;af_sub1=3DAcquisiti=
on&amp;af_sub2=3DUS_YMktg&amp;af_sub3=3D&amp;af_sub4=3D100002473&amp;af_s=
ub5=3DSentFromNewAOLApp__Interstitial_&amp;af_ios_store_cpp=3Dce85ce34-ad=
0f-4811-a92b-a172743b064e&amp;af_android_url=3Dhttps%3A%2F%2Fplay.google.=
com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.aol.mobile.aolapp%26listing%3Dema=
il_signature_attribution"><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>&nbsp;</o:p></p><p class=3Dyahoo-quoted-begin =
style=3D'margin-top:0cm'><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";>&lt;healeys@autox.team.net&gt;</a>=
 wrote:<o:p></o:p></span></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div =
id=3Dyiv6324880639><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'>&nbsp; =
&nbsp; &nbsp;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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et</a><o:p></o:p></pre><pre><o:p>&nbsp;</o:p></pre></blockquote><pre>-- =
<o:p></o:p></pre><pre>David Nock<o:p></o:p></pre><pre>British Car =
Specialists<o:p></o:p></pre><pre>Stockton Ca=C2=A0 =
<o:p></o:p></pre><pre>209 948 8767<o:p></o:p></pre><pre><a =
href=3D"http://www.britishcarspecialists.com";>www.britishcarspecialists.c=
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