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<p>That is at tab that we install on all engines after repairing
cooling systems, or rebuilds. They are desigened to fall off it
the engine is overheated. We usually install on one of the rear
core plugs.</p>
<pre class="moz-signature" cols="72">--
David Nock
British Car Specialists
Stockton Ca
209 948 8767
<a class="moz-txt-link-abbreviated" href="http://www.britishcarspecialists.com">www.britishcarspecialists.com</a></pre>
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<div class="moz-cite-prefix">On 10/31/2025 8:44 AM, Michael Oritt
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAPTa0B7M8jcMeX7QS6KQw3XG9JpVUPx-mdir6jh1qL18VpHnLA@mail.gmail.com">
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<div dir="ltr">
<div class="gmail_default" style="color:#3333ff">Good catch
Bob! Wow, it wouldn't be such a super thing to have the plug
go away....</div>
<div class="gmail_default" style="color:#3333ff"><br>
</div>
<div class="gmail_default" style="color:#3333ff">Best--Michael
Oritt </div>
</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Fri, Oct 31, 2025 at
10:39 AM Bob Spidell via Healeys <<a
href="mailto:healeys@autox.team.net" moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> I did a little diggin ... <br>
<br>
Apparently, they are designed to melt if the engine
overheats, which would be grounds for voiding the warranty
on a re-man. I wonder if the plug is made of bismuth, which
is what sets off automatic fire sprinklers.<br>
<br>
<a
href="https://www.toyotanation.com/threads/mysterious-plugs-in-engine-block.1659464/"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.toyotanation.com/threads/mysterious-plugs-in-engine-block.1659464/</a><br>
<br>
<div>On 10/31/2025 5:08 AM, Simon Lachlan via Healeys wrote:<br>
</div>
<blockquote type="cite">
<p dir="LTR"><span lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"> <font
face="Aptos">I saw this on Facebook</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"><font face="Aptos"> just now. Just
curious….what</font></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"><font
face="Aptos">’s</font></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"><font
face="Aptos"> that thing in the middle of th</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"><font face="Aptos">e</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"> <font face="Aptos">core plug</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"><font face="Aptos">? And</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"><font face="Aptos">,</font></span><span
lang="en-gb"></span><span lang="en-gb"></span><span
lang="en-gb"><font face="Aptos"> if it’s a good thing,
why</font></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"> <font
face="Aptos">don’t all the plugs have one? </font></span></p>
<p dir="LTR"><span lang="en-gb"><font face="Aptos">Thanks,
Simon</font></span><span lang="en-gb"></span><span
lang="en-gb"></span><span lang="en-gb"></span></p>
<br>
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