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<p>OEM thermostats when fail they do so closed. With other
thermostats it can be open, closed or in between. Anyway when a
thermostat fails, which is not very often, you soon notice the
result on the temperature gauge!!</p>
<p>Kees Oudesluijs</p>
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<div class="moz-cite-prefix">Op 13-9-2018 om 16:14 schreef Bob
Spidell:<br>
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<p>One other consideration: I have heard--note: hearsay--that the
OEM sleeved stats are of the 'fail closed' variety. Have seen
modern ones called 'fail open' or, even 'failsafe.'</p>
<p>FWIW.</p>
<p>Bob<br>
</p>
<br>
<div class="moz-cite-prefix">On 9/11/2018 3:44 PM, Roger Grace
wrote:<br>
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<div>Steve,</div>
<div>Yes agree with your take on the 160 F thermostats. The
only possible benefit is that if you start with a lower
coolant temp, when you hit traffic, it will take longer
before the dreaded over temp zone is approached.</div>
<div>As an aside, I have installed an oil temp gauge; very
useful and a reminder just how long the engine (not
coolant) takes to get up to temp. Trying to get in the
habit of not going over 2000 RPM till OT is about 120F –
often another 15-20 mins after the thermostat opens. </div>
<div>rg</div>
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<div style="BACKGROUND: #f5f5f5">
<div style="font-color: black"><b>From:</b> <a
title="sbyers@ec.rr.com" moz-do-not-send="true">BJ8Healeys</a>
</div>
<div><b>Sent:</b> Monday, September 10, 2018 12:44 PM</div>
<div><b>To:</b> <a title="Healeys@autox.team.net"
moz-do-not-send="true">'healeys'</a> </div>
<div><b>Subject:</b> Re: [Healeys] Thermostats</div>
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#002060">Fred, I personally believe a 160-deg. F
thermostat used in an effort to "cool down" a Healey
is useless. A thermostat responds only to the
temperature of the coolant flowing through it by
opening up to increase coolant flow, and once it is
open all the way at 160+, it is out of the loop and
can't open further to cool more. I am on the NC
coast where winters are mild. I once tried a 160
(non-sleeved) because I had one that someone gave
me. My BJ8 ran so cold that winter that I actually
had to block part of the radiator to raise it to
anywhere near normal. Up there in the NC mountains,
that would be even more of a problem for you.<o:p></o:p></span></p>
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#002060">I use a 187 F (86 C) New Old Stock AC
sleeved thermostat (AC part number 1572320) that I
was able to score from lister Kees Oudesluijs. I
installed it along with an upgraded core in the
radiator at the same time, so I can't really say how
much improvement the thermostat alone did; but since
the modification my car runs consistently at 170 -
180 in the hot summers of the NC coast, except when
in stop-and-go traffic when it might make it to 190
or a bit above. In winter, it runs at 160 - 170. I
can see the sleeve operate as the car warms up
because the gauge will cycle between 160 and 190
until coolant temperature stabilizes. That can take
up to 50 miles.<o:p></o:p></span></p>
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#002060">A friend placed an order later with Kees
for several of the 190 F sleeved thermostats. I got
one of those as a spare. Don't know if he has any
left, or can get more. As far as I know, the only
sleeved thermostats available from the usual
suspects are 160s and I wouldn't waste my money on
them.<o:p></o:p></span></p>
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#002060">I just Googled the AC part number and came
up with this source:<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="FONT-SIZE:
11pt;
 FONT-FAMILY: "Comic Sans MS";
COLOR:
 #002060"><a
href="https://tinyurl.com/y9c6n53h"
moz-do-not-send="true">https://tinyurl.com/y9c6n53h</a><o:p></o:p></span></b></p>
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#002060">Unfortunately, it does not post to the USA
(but on the bright side, it offers free shipping!).
Maybe you could work out a deal with a UK lister to
buy one for you and ship it to you. £19.99 = $26.04
</span><span style="FONT-SIZE: 11pt; FONT-FAMILY:
"Comic Sans
 MS"; COLOR: #002060"><o:p></o:p></span></p>
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#002060"><o:p></o:p></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

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#002060">Steve Byers</span><span
style="FONT-SIZE:
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 #002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

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#002060">HBJ8L/36666</span><span
style="FONT-SIZE:
 11pt; FONT-FAMILY:

"Calibri","sans-serif";
COLOR:
 #002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

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#002060">BJ8 Registry</span><span
style="FONT-SIZE:
 11pt; FONT-FAMILY:

"Calibri","sans-serif";
COLOR:
 #002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

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#002060">AHCA Delegate at Large</span><span
style="FONT-SIZE: 11pt; FONT-FAMILY:

"Calibri","sans-serif";
COLOR:
 #002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

FONT-FAMILY: "Comic Sans MS"; COLOR:

#002060">Havelock, NC </span><span
style="FONT-SIZE:
 11pt; FONT-FAMILY:

"Calibri","sans-serif";
COLOR:
 #002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

FONT-FAMILY:

"Calibri","sans-serif";
COLOR:
 #002060"><o:p></o:p></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt;

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#002060"><o:p></o:p></span><br>
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