--===============1325420548042555279==
--0000000000001c7237063f0a79bc
Content-Transfer-Encoding: quoted-printable
On my BJ8 I measure the coolant temp in the top hose.This is generally
about 10F less than the Smiths. I attribute this to the temp loss in the
hose ? Have calibrated this sensor with a mercury stick thermometer and it
is within a few degrees on the Smiths. BTW hot coolant enters the rad.
from the top.
rg
On Wed, Sep 17, 2025 at 7:32=E2=80=AFPM Michael Salter <michael.salter@gmai=
l.com>
wrote:
> Something else to remember is that the temperature bulb is located either
> in the top tank of the radiator 100's & 100/6 or directly below the
> thermostat housing where the coolant which has passed through the radiato=
r
> enters the engine. This means that the coolant in the engine and exiting
> from the engine is probably significantly hotter.
> Has anyone actually measured the temperature of the coolant as it enters
> the radiator at the bottom?
> It could well be that magic 185=C2=B0F that an engine apparently requires=
for
> best operation occurs at a significantly lower indicated temperature.
>
> M
>
>
>
> ------------------------------
> *From:* Healeys <healeys-bounces@autox.team.net> on behalf of richard
> mayor <boyracer466@gmail.com>
> *Sent:* Wednesday, September 17, 2025 7:09:14 PM
> *To:* Leach Hank <gradea1@charter.net>
> *Cc:* Richard Antal <rantal243@yahoo.com>; Healeys <healeys@autox.team.ne=
t
> >
> *Subject:* Re: [Healeys] radiator thermostat
>
> Hank makes a very good point about where to measure the water temp. And
> to get an infrared temperature sensor. I recently fired up a fresh V8
> engine to break in the cam. I had also bought a new water temp gauge wit=
h
> sensor. The new sensor was screwed into a port on the cylinder head. A=
s
> we were running the engine I saw the temp climb and approach 220 degrees
> but fortunately I had my infrared sensor. The water temp was actually
> quite lower and I was able to take readings from various places in the
> system. If I had relied solely on the gauge I would have freaked out and
> probably shut the engine down.
>
> Just another example of the garbage that is being sold in the parts store=
s
> these days.
>
> Richard Mayor
> boyracer466@gmail.com
>
>
>
> On Sep 17, 2025, at 3:47=E2=80=AFPM, Hank Leach <gradea1@charter.net> wro=
te:
>
> I would like to comment about the position of the temperature "sensor"
> found in the Healey. All of them-100s and 3000s measure the
> water/antifreeze temperature flowing thru the radiator. That is not
> necessarily the temperature of the engine itself. Using a heat detector g=
un
> (Harbor Freight) you can actually see the head, block and exhaust reading=
s
> and they will be different than the degrees indicated which has been read
> in the water flowing and transferred down a long capillary tube to an
> analog gauge.
>
> In contrast, most older American cars, and incidentally the Jensen-Healey=
,
> measure the temperature of the manifold, or the block, by electronic sens=
or
> to an analog gauge.
>
> I'm sure todays' vehicles have more accurate measurements, but they don't
> tell us what that actual number is unless an icon illuminates on the dash
> indicating a problem with temperature. I guess that ancient type of
> measurement is what gives the Healey its charm. Be it Fahrenheit or
> Centigrade. Hank
>
> --------------------
>
> From: "Harold Manifold" <manifold@telus.net>
> To: "Richard Mayor" <boyracer466@gmail.com>
> Cc: "Richard Antal" <rantal243@yahoo.com>, "Healeys" <
> healeys@autox.team.net>
> Sent: September 17, 2025 at 3:05 PM PDT
> Subject: Re: [Healeys] radiator thermostat
> Hi All,
>
> Thermostats always generate interesting discussions.
>
> I use a 180-degree thermostat in my car. However, what's equally importan=
t
> 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.
>
> If your current thermostat maintains the coolant temperature within its
> specified range under normal driving conditions, then it's the correct on=
e
> for your needs.
>
> Harold
>
> On Wed, Sep 17, 2025 at 1:36=E2=80=AFPM Richard Mayor <boyracer466@gmail.=
com>
> wrote:
>
> 165 is too cold for good running. Our engines run better in the 180 to
> 190 range.
>
>
> Sent from my iPad
>
> On Sep 17, 2025, at 12:13=E2=80=AFPM, Robert Markovich via Healeys <
> healeys@autox.team.net> wrote:
>
> 165 is the one I use
>
>
> Sent from the all new AOL app for iOS
> <https://aolapp.onelink.me/eG2g?pid=3DNativePlacement&c=3DUS_Acquisition_=
YMktg_320_EmailSignature_AttributionDL&af_sub1=3DAcquisition&af_sub2=3DUS_Y=
Mktg&af_sub3=3D&af_sub4=3D100002473&af_sub5=3DSentFromNewAOLApp__Interstiti=
al_&af_ios_store_cpp=3Dce85ce34-ad0f-4811-a92b-a172743b064e&af_android_url=
=3Dhttps%3A%2F%2Fplay.google.com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.aol.mo=
bile.aolapp%26listing%3Demail_signature_attribution>
>
> On Wednesday, September 17, 2025, 2:50 PM, Richard Antal via Healeys <
> healeys@autox.team.net> wrote:
>
> 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 an=
d
> found to be accurate, kept the coolant at around 165. Thanks to all who
> respond.
> rich antal
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
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>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
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>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys
>
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> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
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>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive/healeys
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>
--0000000000001c7237063f0a79bc
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:large">On =
my BJ8 I measure the coolant temp in the top hose.This is generally about 1=
0F less than the Smiths. I attribute this to the temp loss in the hose ? Ha=
ve calibrated this sensor with a mercury=C2=A0stick thermometer and it is w=
ithin a few degrees=C2=A0on the Smiths.=C2=A0 BTW hot coolant enters the ra=
d. from the top.</div><div class=3D"gmail_default" style=3D"font-size:large=
">rg</div><div class=3D"gmail_default" style=3D"font-size:large"><br></div>=
</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Wed, Sep 17, 2025 at 7:32=E2=80=AFPM Michael Salter <<a href=3D"mailt=
o:michael.salter@gmail.com" target=3D"_blank">michael.salter@gmail.com</a>&=
gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
Something else to remember is that the temperature bulb is located either i=
n the top tank of the radiator 100's & 100/6 or directly below the =
thermostat housing where the coolant which has passed through the radiator =
enters the engine. This means that the coolant
in the engine and exiting from the engine is probably significantly hotter=
.=C2=A0</div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
Has anyone actually measured the temperature of the coolant as it enters th=
e radiator at the bottom?</div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
It could well be that magic 185=C2=B0F that an engine apparently requires f=
or best operation occurs at a significantly lower indicated temperature.=C2=
=A0</div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
<br>
</div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
M</div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
<br>
</div>
<div id=3D"m_-137577282233278094m_-1449391584320249839ms-outlook-mobile-bod=
y-separator-line" dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontServi=
ce,-apple-system,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
<br>
</div>
</div>
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt" id=3D"m_-137577282233=
278094m_-1449391584320249839ms-outlook-mobile-signature">
<div dir=3D"auto" style=3D"font-family:Aptos,Aptos_MSFontService,-apple-sys=
tem,Roboto,Arial,Helvetica,sans-serif;font-size:12pt">
<br>
</div>
</div>
<hr style=3D"display:inline-block;width:98%">
<div id=3D"m_-137577282233278094m_-1449391584320249839divRplyFwdMsg" dir=3D=
"ltr"><font face=3D"Calibri, sans-serif" style=3D"font-size:11pt" color=3D"=
#000000"><b>From:</b> Healeys <<a href=3D"mailto:healeys-bounces@autox.t=
eam.net" target=3D"_blank">healeys-bounces@autox.team.net</a>> on behalf=
of richard mayor <<a href=3D"mailto:boyracer466@gmail.com"; target=3D"_b=
lank">boyracer466@gmail.com</a>><br>
<b>Sent:</b> Wednesday, September 17, 2025 7:09:14 PM<br>
<b>To:</b> Leach Hank <<a href=3D"mailto:gradea1@charter.net"; target=3D"=
_blank">gradea1@charter.net</a>><br>
<b>Cc:</b> Richard Antal <<a href=3D"mailto:rantal243@yahoo.com"; target=
=3D"_blank">rantal243@yahoo.com</a>>; Healeys <<a href=3D"mailto:heal=
eys@autox.team.net" target=3D"_blank">healeys@autox.team.net</a>><br>
<b>Subject:</b> Re: [Healeys] radiator thermostat</font>
<div>=C2=A0</div>
</div>
<div>Hank makes a very good point about where to measure the water temp.=C2=
=A0 And to get an infrared temperature sensor.=C2=A0 I recently fired up a =
fresh V8 engine to break in the cam.=C2=A0 I had also bought a new water te=
mp gauge with
sensor.=C2=A0 The new =C2=A0sensor was screwed into a port on the cylinder=
head.=C2=A0 As we were running the engine I saw the temp climb and approac=
h 220 degrees but fortunately I had my infrared sensor.=C2=A0 The water tem=
p was actually quite lower and I was able to take readings
from various places in the system.=C2=A0 If I had relied solely on the gau=
ge I would have freaked out and probably shut the engine down.
<div><br>
</div>
<div>Just another example of the garbage that is being sold in the parts st=
ores these days. =C2=A0=C2=A0
<div>=C2=A0<br id=3D"m_-137577282233278094m_-1449391584320249839x_lineBreak=
AtBeginningOfMessage">
<div>
<div>Richard Mayor</div>
<div><a href=3D"mailto:boyracer466@gmail.com"; target=3D"_blank">boyracer466=
@gmail.com</a></div>
<div><br>
</div>
<br>
</div>
<div><br>
<blockquote type=3D"cite">
<div>On Sep 17, 2025, at 3:47=E2=80=AFPM, Hank Leach <<a href=3D"mailto:=
gradea1@charter.net" target=3D"_blank">gradea1@charter.net</a>> wrote:</=
div>
<br>
<div>
<div>I would like to comment about the position of the temperature "se=
nsor" found in the Healey. All of them-100s and 3000s measure the wate=
r/antifreeze temperature
<span style=3D"text-decoration:underline">flowing thru the radiator</span>.=
That is not necessarily the temperature of the engine itself. Using a heat=
detector gun (Harbor Freight) you can actually see the head, block and exh=
aust readings and they will be different
than the degrees indicated which has been read in the water flowing and tr=
ansferred down a long capillary tube to an analog gauge.</div>
<div>=C2=A0</div>
<div>In contrast, most older American cars, and incidentally the Jensen-Hea=
ley, measure the temperature of the manifold, or the block, by electronic s=
ensor to an analog gauge.</div>
<div>=C2=A0</div>
<div>I'm sure todays' vehicles have more accurate measurements, but=
they don't tell us what that actual number is unless an icon illuminat=
es on the dash indicating a problem with temperature. I guess that ancient =
type of measurement is what gives the Healey
its charm. Be it Fahrenheit or Centigrade. Hank</div>
<div><br>
-------------------- <br>
<br>
From: "Harold Manifold" <<a href=3D"mailto:manifold@telus.net"=
target=3D"_blank">manifold@telus.net</a>> <br>
To: "Richard Mayor" <<a href=3D"mailto:boyracer466@gmail.com"; =
target=3D"_blank">boyracer466@gmail.com</a>> <br>
Cc: "Richard Antal" <<a href=3D"mailto:rantal243@yahoo.com"; ta=
rget=3D"_blank">rantal243@yahoo.com</a>>, "Healeys" <<a hre=
f=3D"mailto:healeys@autox.team.net"; target=3D"_blank">healeys@autox.team.ne=
t</a>> <br>
Sent: September 17, 2025 at 3:05 PM PDT <br>
Subject: Re: [Healeys] radiator thermostat </div>
<div>
<div>Hi All,</div>
<div>=C2=A0</div>
<div>Thermostats always generate interesting discussions.</div>
<div>=C2=A0</div>
<div>I use a 180-degree thermostat in my car. However, what's equally i=
mportant is how effectively the thermostat regulates the coolant temperatur=
e. A thermostat that is fully closed or fully open is no longer actively co=
ntrolling 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 16=
5 and 185 degrees, while a 180-degree thermostat should keep it between 180=
and 200 degrees.</div>
<div>=C2=A0</div>
<div>If your current thermostat maintains the coolant temperature within it=
s specified range under normal driving conditions, then it's the correc=
t one for your needs.</div>
<div>=C2=A0</div>
<div>Harold</div>
</div>
<div>=C2=A0</div>
<div>
<div>On Wed, Sep 17, 2025 at 1:36=E2=80=AFPM Richard Mayor <<a href=3D"m=
ailto:boyracer466@gmail.com" target=3D"_blank">boyracer466@gmail.com</a>>=
; wrote:</div>
<blockquote style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex">
<div>165 is too cold for good running.=C2=A0 Our engines run better in the =
180 to 190 range. =C2=A0
<div>=C2=A0</div>
<div><br>
<div>
<div>Sent from my iPad</div>
<div><br>
<blockquote>On Sep 17, 2025, at 12:13=E2=80=AFPM, Robert Markovich via Heal=
eys <<a href=3D"mailto:healeys@autox.team.net"; rel=3D"noopener" target=
=3D"_blank">healeys@autox.team.net</a>> wrote:<br>
<br>
</blockquote>
</div>
<blockquote>
<div>165 is the one I use<br>
<br>
<br>
<div><a href=3D"https://aolapp.onelink.me/eG2g?pid=3DNativePlacement&c=
=3DUS_Acquisition_YMktg_320_EmailSignature_AttributionDL&af_sub1=3DAcqu=
isition&af_sub2=3DUS_YMktg&af_sub3=3D&af_sub4=3D100002473&a=
f_sub5=3DSentFromNewAOLApp__Interstitial_&af_ios_store_cpp=3Dce85ce34-a=
d0f-4811-a92b-a172743b064e&af_android_url=3Dhttps%3A%2F%2Fplay.google.c=
om%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.aol.mobile.aolapp%26listing%3Demail_=
signature_attribution" rel=3D"noopener" style=3D"font-size:12px" target=3D"=
_blank">Sent
from the all new AOL app for iOS</a></div>
<br>
<p style=3D"font-size:15px;color:rgb(132,115,255);padding-top:15px;margin-t=
op:0px">
On Wednesday, September 17, 2025, 2:50 PM, Richard Antal via Healeys <<a=
href=3D"mailto:healeys@autox.team.net"; rel=3D"noopener" target=3D"_blank">=
healeys@autox.team.net</a>> wrote:</p>
<blockquote>
<div id=3D"m_-137577282233278094m_-1449391584320249839x_m_38623314385482453=
16yiv6324880639">
<div>
<div style=3D"font-family:"Helvetica Neue",Helvetica,Arial,sans-s=
erif;font-size:13px">
<div>Gents,</div>
<div>=C2=A0 =C2=A0 =C2=A0What is the desired coolant temperature for optima=
l engine performance? I've searched the tech articles and can find noth=
ing that specifically answers that question. This summer my BJ8 seemed to r=
un 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.</div>
<div>rich antal</div>
</div>
</div>
</div>
_______________________________________________<br>
r" target=3D"_blank">
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noopener"=
target=3D"_blank">
http://www.team.net/pipermail/healeys</a> <a href=3D"http://autox.team.net/=
archive/healeys" rel=3D"noopener" target=3D"_blank">
http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; rel=3D"noopener" target=3D"_blank=
">Healeys@autox.team.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noopener"=
target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/rmarkovich@aol.com" rel=3D"noopener" target=3D"_blank">
http://autox.team.net/mailman/options/healeys/rmarkovich@aol.com</a><br>
<br>
</blockquote>
_______________________________________________<br>
r" target=3D"_blank">
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noopener"=
target=3D"_blank">
http://www.team.net/pipermail/healeys</a> <a href=3D"http://autox.team.net/=
archive/healeys" rel=3D"noopener" target=3D"_blank">
http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; rel=3D"noopener" target=3D"_blank=
">Healeys@autox.team.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noopener"=
target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/boyracer466@gmail.com" rel=3D"noopener" target=3D"_blank">
http://autox.team.net/mailman/options/healeys/boyracer466@gmail.com</a><br>
<br>
</div>
</blockquote>
</div>
</div>
</div>
_______________________________________________<br>
r" target=3D"_blank">
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noopener"=
target=3D"_blank">
http://www.team.net/pipermail/healeys</a> <a href=3D"http://autox.team.net/=
archive/healeys" rel=3D"noopener" target=3D"_blank">
http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; rel=3D"noopener" target=3D"_blank=
">Healeys@autox.team.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noopener"=
target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/manifold@telus.net" rel=3D"noopener" target=3D"_blank">
http://autox.team.net/mailman/options/healeys/manifold@telus.net</a><br>
<br>
</blockquote>
</div>
<div>=C2=A0</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</div>
_______________________________________________<br>
rer" target=3D"_blank">http://www.team.net/donate.html</a><br>
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Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noreferre=
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ttp://autox.team.net/archive/healeys" rel=3D"noreferrer" target=3D"_blank">=
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