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I tried to help myself but I have once again been drawn into a discussion
about engine thermostats. As I read the posts the underlying questions are
what is the best thermostat and do I have the right one? I will correct one
Poster who suggested the role of the thermostat was to control pressure in
the cooling system. While thermostats may have an effect on pressure in the
cooling system that is the job of the radiator cap.
I suggest the best thermostat has these features: fails in the open position
i.e. coolant circulates through the radiator. You can get home with a cool
engine but not a hot one. Blocks circulation of coolant between the engine
and radiator until the engine has reached its predetermined temperature.
i.e. The thermostat fits the housing and seals when closed. The thermostat
fully opens about 15-20 degrees above its rated temperature. The thermostat
should have a "jiggle pin" or "check valve" that allows trapped air in the
cooling system to pass through the thermostat and be released from the
system.
Do I have the right one? Based on old manuals I have seen there were two
temperature ratings for 3000 Healeys, Summer 70 Deg C/160 Deg F and Winter
86 Deg C/185 Deg F. I believe the thinking behind the two thermostat
approach was to reduce boiling the radiator in summer and to make the heater
work better in the winter. Depending on where you live and and the driving
conditions may influence which end of the range you want to be at. If you
live in Florida and/or drive in slow moving traffic I would suggest the 160
degree. Your cooling system will have more reserve when traffic slows. If
you live in Ottawa 185 is likely better as it is winter all the time.
However, the most important factor is not opening temperature but does the
thermostat properly control the coolant temperature. If you have a 160
degree thermostat and the coolant temperature fluctuates between 160-180
then it is the right one. Likewise the 185 should stay between 185-205. It
is most important for the cooling system to stay between the lower and upper
temperatures. If the temperature is not between these two points then the
cooling system is "not in control".
Bottom line is if the cooling system is "in control" and you are happy with
the way the car warms up you have the right thermostat.
Harold
_____
From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Linwood
Rose
Sent: Sunday, September 16, 2018 7:19 AM
To: Rossm
Cc: Forum Healeys
Subject: Re: [Healeys] Thermostats
I would like to go back to Steve Byers' comment. I am not so much concerned
about my car overheating. When the engine was rebuilt it was thoroughly
cleaned to get rid of all sludge. I run an aluminum radiator, have built and
installed air ducting for improved flow. I do not have an electric fan.
My problem was that my engine ran cool and would take quite a while to "warm
up." I think I was using a 165 degree (or thereabouts) non-sleeved
thermostat. Robert Shaw as I recall. So I wanted to get my engine up to
185-190 degrees sooner. I went with one of the same AC sleeved thermostats
82 degrees centigrade from Kees that Steve used. The engine seems to be much
happier and gets to running temp more quickly.
At least for my engine, a 160-165 degree thermostat keeps things cool too
long. In a perfect world I would prefer David Nock's bellows thermostat but
with a 185-190 degree opening. Since that doesn't seem to be available I
think I will stick with the AC unit and keep my eye on the temp. Gauge.
I am no authority on this. I am simply passing along my experience. Am I
understanding all of this correctly?
Thanks,
Lin
Sent from my iPhone
On Sep 15, 2018, at 9:30 PM, Rossm <rvmaylor@shaw.ca> wrote:
To be fair Michael, it is hot maybe three days a year in Canada?:) . I left
Calgary yesterday for the Rendezvous and it was snowing already. First time
the hood contraption on the BN6 has been up since last September.
Sent from my iPhone
On Sep 15, 2018, at 10:50, Michael Salter <michael.salter@gmail.com> wrote:
Well I have watched this discussion on sleeved thermostats for the last week
but now I just have to say. When the sleeved thermostats went NLA, about 45
years ago, we resorted to installing just plain old Stant 175 degree stats
and guess what ... not one complaint or comment on running hotter or
overheating and absolutely no sign of any symptoms of overheating on my own
BJ8 even in the hottest of ambient temperatures. It just didn't happen!!!
Just sayin'. M
_____
From: Healeys <healeys-bounces@autox.team.net> on behalf of Rossm
<rvmaylor@shaw.ca>
Sent: Saturday, September 15, 2018 10:35:32 AM
To: Forum Healeys
Subject: [Healeys] Thermostats
Three sleeved thermostats, one on the right 160 degrees, middle no idea,
left is a Smiths x85002s/86 (180F) and has failed open.
_______________________________________________
Archive: http://www.team.net/pipermail/healeys
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
http://autox.team.net/mailman/options/healeys/rvmaylor@shaw.ca
_______________________________________________
Archive: http://www.team.net/pipermail/healeys
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
http://autox.team.net/mailman/options/healeys/linwoodrose@mac.com
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<DIV dir=3Dltr align=3Dleft><SPAN class=3D436134816-16092018><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial>I tried to help myself but I have once again been =
drawn into a=20
discussion about engine thermostats. As I read the posts the underlying=20
questions are what is the best thermostat and do I have the right one? I =
will=20
correct one Poster who suggested the role of the thermostat was to =
control=20
pressure in the cooling system. While thermostats may have an effect on =
pressure=20
in the cooling system that is the job of the radiator cap. =
</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D436134816-16092018><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial><FONT size=3D2><FONT =
color=3D#0000ff><SPAN=20
class=3D436134816-16092018>I suggest the best thermostat has these =
features: fails=20
in the open position i.e. coolant circulates through the radiator. You =
can get=20
home with a cool engine but not a hot one. Blocks circulation of coolant =
between=20
the engine and radiator until the engine has reached its predetermined=20
temperature. i.e. The thermostat fits the housing and seals when closed. =
</SPAN><SPAN class=3D436134816-16092018>The thermostat fully opens about =
15-20=20
degrees above its rated temperature. The thermostat should have a =
“jiggle pin”=20
or “check valve” that allows trapped air in the cooling =
system to pass through=20
the thermostat and be released from the=20
system.</SPAN></FONT></FONT></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D436134816-16092018></SPAN></FONT> </DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D436134816-16092018>Do I have the right one? Based on old manuals =
I have=20
seen there were two temperature ratings for 3000 Healeys, Summer 70 Deg =
C/160=20
Deg F and Winter 86 Deg C/185 Deg F. I believe the thinking behind the =
two=20
thermostat approach was to reduce boiling the radiator in summer and to =
make the=20
heater work better in the winter. Depending on where you live and and=20
the driving conditions may influence which end of the range you =
want to be=20
at. If you live in Florida and/or drive in slow moving traffic I would =
suggest=20
the 160 degree. Your cooling system will have more reserve =
when traffic=20
slows. If you live in Ottawa 185 is likely better as it is winter all =
the time.=20
However, the most important factor is not opening temperature but =
does the=20
thermostat properly control the coolant temperature. If you have a 160 =
degree=20
thermostat and the coolant temperature fluctuates between 160-180 then =
it is the=20
right one. Likewise the 185 should stay between 185-205. It is most =
important=20
for the cooling system to stay between the lower and upper temperatures. =
If the=20
temperature is not between these two points then the cooling system is =
"not in=20
control".</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D436134816-16092018></SPAN></FONT> </DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D436134816-16092018>Bottom line is if the cooling system is "in =
control"=20
and you are happy with the way the car warms up you have the right=20
thermostat.</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D436134816-16092018></SPAN></FONT> </DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial><FONT size=3D2><FONT =
color=3D#0000ff><SPAN=20
class=3D436134816-16092018>Harold</SPAN></FONT></FONT></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D436134816-16092018><FONT =
color=3D#0000ff=20
size=3D2 face=3DArial></FONT></SPAN> </DIV><FONT size=3D2 =
face=3DArial></FONT><BR>
<DIV lang=3Den-us class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT size=3D2 face=3DTahoma><B>From:</B> Healeys=20
[mailto:healeys-bounces@autox.team.net] <B>On Behalf Of </B>Linwood=20
Rose<BR><B>Sent:</B> Sunday, September 16, 2018 7:19 AM<BR><B>To:</B>=20
Rossm<BR><B>Cc:</B> Forum Healeys<BR><B>Subject:</B> Re: [Healeys]=20
Thermostats<BR></FONT><BR></DIV>
<DIV></DIV>I would like to go back to Steve Byers’ comment. I am =
not so much=20
concerned about my car overheating. When the engine was rebuilt it was=20
thoroughly cleaned to get rid of all sludge. I run an aluminum radiator, =
have=20
built and installed air ducting for improved flow. I do not have an =
electric=20
fan.
<DIV><BR></DIV>
<DIV>My problem was that my engine ran cool and would take quite a while =
to=20
“warm up.” I think I was using a 165 degree (or thereabouts) =
non-sleeved=20
thermostat. Robert Shaw as I recall. So I wanted to get my engine up to =
185-190=20
degrees sooner. I went with one of the same AC sleeved thermostats 82 =
degrees=20
centigrade from Kees that Steve used. The engine seems to be much =
happier and=20
gets to running temp more quickly.</DIV>
<DIV><BR></DIV>
<DIV>At least for my engine, a 160-165 degree thermostat keeps things =
cool too=20
long. In a perfect world I would prefer David Nock’s bellows =
thermostat but with=20
a 185-190 degree opening. Since that doesn’t seem to be available =
I think I will=20
stick with the AC unit and keep my eye on the temp. Gauge.</DIV>
<DIV><BR></DIV>
<DIV>I am no authority on this. I am simply passing along my experience. =
Am I=20
understanding all of this correctly? </DIV>
<DIV><BR></DIV>
<DIV>Thanks,</DIV>
<DIV>Lin<BR><BR>
<DIV id=3DAppleMailSignature>Sent from my iPhone</DIV>
<DIV><BR>On Sep 15, 2018, at 9:30 PM, Rossm <<A=20
href=3D"mailto:rvmaylor@shaw.ca";>rvmaylor@shaw.ca</A>> =
wrote:<BR><BR></DIV>
<BLOCKQUOTE type=3D"cite">
<DIV>To be fair Michael, it is hot maybe three days a year in =
Canada?:) .=20
I left Calgary yesterday for the Rendezvous and it was snowing =
already.=20
First time the hood contraption on the BN6 has been up since last =
September.=20
<BR><BR>
<DIV id=3DAppleMailSignature>Sent from my iPhone</DIV>
<DIV><BR>On Sep 15, 2018, at 10:50, Michael Salter <<A=20
=
href=3D"mailto:michael.salter@gmail.com";>michael.salter@gmail.com</A>>=
=20
wrote:<BR><BR></DIV>
<BLOCKQUOTE type=3D"cite">
<DIV>
<META name=3DGenerator content=3D"Microsoft Exchange Server"><!-- =
converted from text -->
<STYLE>.EmailQuote {
PADDING-LEFT: 4pt; MARGIN-LEFT: 1pt; BORDER-LEFT: #800000 2px solid
}
</STYLE>
<DIV>Well I have watched this discussion on sleeved thermostats for =
the last=20
week but now I just have to say. When the sleeved thermostats went =
NLA,=20
about 45 years ago, we resorted to installing just plain old Stant =
175=20
degree stats and guess what ... not one complaint or comment on =
running=20
hotter or overheating and absolutely no sign of any symptoms of =
overheating=20
on my own BJ8 even in the hottest of ambient temperatures. It just =
didn't=20
happen!!! Just sayin'. M=20
<HR tabIndex=3D-1 style=3D"WIDTH: 98%; DISPLAY: inline-block">
<DIV id=3Dx_divRplyFwdMsg dir=3Dltr><FONT style=3D"FONT-SIZE: 11pt" =
color=3D#000000=20
face=3D"Calibri, sans-serif"><B>From:</B> Healeys <<A=20
=
href=3D"mailto:healeys-bounces@autox.team.net";>healeys-bounces@autox.team=
.net</A>>=20
on behalf of Rossm <<A=20
=
href=3D"mailto:rvmaylor@shaw.ca";>rvmaylor@shaw.ca</A>><BR><B>Sent:</B>=
=20
Saturday, September 15, 2018 10:35:32 AM<BR><B>To:</B> Forum=20
Healeys<BR><B>Subject:</B> [Healeys] Thermostats</FONT>=20
<DIV> </DIV></DIV></DIV><FONT size=3D2><SPAN =
style=3D"FONT-SIZE: 11pt">
<DIV class=3DPlainText>Three sleeved thermostats, one on the right =
160=20
degrees, middle no idea, left is a Smiths x85002s/86 (180F) =
and has=20
failed open. <BR><BR></DIV></SPAN></FONT></DIV></BLOCKQUOTE>
<BLOCKQUOTE type=3D"cite">
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