<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Drill out and install a Helicoil We do it all the time. <br><br><div dir="ltr"><div>David Nock</div><div><br></div>Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Feb 27, 2021, at 9:21 PM, WILLIAM B LAWRENCE via Healeys <healeys@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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<div>I doubt there is anything non-metallic that will stand up to the heat that close to the exhaust valves. Sounds like a job for a helicoil.</div>
<div><br>
</div>
<div>Bill Lawrence</div>
<div>BN1 #554</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Healeys <healeys-bounces@autox.team.net> on behalf of Bob Spidell via Healeys <healeys@autox.team.net><br>
<b>Sent:</b> Sunday, February 28, 2021 5:06 AM<br>
<b>To:</b> healeys@autox.team.net <healeys@autox.team.net><br>
<b>Subject:</b> Re: [Healeys] Exhaust header stud fix ?</font>
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<div class="PlainText">I used this stuff once to bolster the threads in a bellhousing slave
<br>
cylinder mount:<br>
<br>
<a>https://www.amazon.com/Loctite-442-28654-4-80ml-Thread-Stripped/dp/B000WSEUII/ref=asc_df_B000WSEUII/?tag=hyprod-20&linkCode=df0&hvadid=312106049007&hvpos=&hvnetw=g&hvrand=6889728303295400308&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1014019&hvtargid=pla-440732566291&psc=1&tag=&ref=&adgrpid=62149806956&hvpone=&hvptwo=&hvadid=312106049007&hvpos=&hvnetw=g&hvrand=6889728303295400308&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1014019&hvtargid=pla-440732566291</a><br>
<br>
It held up for quite a few years, until I got a chance to put inserts <br>
in; but, 300degF may not be enough for exhaust proximity. It's an epoxy, <br>
like JB Weld, but it uses (your) bolt to form threads, and a 'release <br>
agent' to keep the bolt/stud from being glued in. I can't say for sure, <br>
but my gut feeling is an epoxy would gum up a tap.<br>
<br>
Bob<br>
<br>
On 2/27/2021 8:25 PM, Alan Seigrist via Healeys wrote:<br>
> All -<br>
><br>
> One of the three holes at the bottom of my exhaust header is loose and <br>
> the stud doesn't seat properly (but it does screw in).<br>
><br>
> I was thinking of putting some "thermosteel" or JB "extreme heat" in <br>
> there then tapping it out.<br>
><br>
> The threads are still there and it just needs a bit of fill to tighten <br>
> it up.<br>
><br>
> Has anyone ever done a similar repair? Will it last?<br>
><br>
> Alan<br>
><br>
<br>
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