I used this stuff once to bolster the threads in a bellhousing slave
cylinder mount:
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
It held up for quite a few years, until I got a chance to put inserts
in; but, 300degF may not be enough for exhaust proximity. It's an epoxy,
like JB Weld, but it uses (your) bolt to form threads, and a 'release
agent' to keep the bolt/stud from being glued in. I can't say for sure,
but my gut feeling is an epoxy would gum up a tap.
Bob
On 2/27/2021 8:25 PM, Alan Seigrist via Healeys wrote:
> All -
>
> One of the three holes at the bottom of my exhaust header is loose and
> the stud doesn't seat properly (but it does screw in).
>
> I was thinking of putting some "thermosteel" or JB "extreme heat" in
> there then tapping it out.
>
> The threads are still there and it just needs a bit of fill to tighten
> it up.
>
> Has anyone ever done a similar repair? Will it last?
>
> Alan
>
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