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<p>... my recollection is waning, but did not the TR7 block have
purposely canted head studs that had to be removed/inserted
individually? Anyone? dp <br>
</p>
<div class="moz-cite-prefix">On 12/13/2021 7:08 AM, Randy and
Valerie DeRuiter wrote:<br>
</div>
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Guy-</div>
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I don't want to sound too doom and gloomy, but have you ruled
out a cracked block at that location? That is a common spot for
one, usually from someone in the past who pulled the engine by
the studs. At least I had an engine like that. If you haven't
done so, take a very good look at the inside edge of the
threaded hole. If you see a crack, that helicoil trick likely
won't work.</div>
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<br>
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<div style="font-family: Calibri, Helvetica, sans-serif;
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If you are convinced it is not cracked, possibly another
solution would be to take advantage of the deeper hole that
you've measured and get a shop to extend the threads of a longer
head bolt. One of the inside longer ones might work - then
shorten the other end to fit. The puzzling part is why does the
stud cant to the rear - that doesn't sound good.</div>
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<br>
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<div style="font-family: Calibri, Helvetica, sans-serif;
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Randy</div>
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<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Triumphs <a class="moz-txt-link-rfc2396E" href="mailto:triumphs-bounces@autox.team.net"><triumphs-bounces@autox.team.net></a> on behalf
of Guy Huggins <a class="moz-txt-link-rfc2396E" href="mailto:guy.huggins@icloud.com"><guy.huggins@icloud.com></a><br>
<b>Sent:</b> Saturday, December 11, 2021 5:28 PM<br>
<b>To:</b> Triumph Mailing List
<a class="moz-txt-link-rfc2396E" href="mailto:triumphs@autox.team.net"><triumphs@autox.team.net></a><br>
<b>Subject:</b> [TR] 1965 TR4A - Looking to drill out a stud
hole in block. Need recommendations on a drill guide/jig.</font>
<div> </div>
</div>
<div class="" style="word-wrap:break-word;
line-break:after-white-space">Howdy All,
<div class=""><br class="">
</div>
<div class="">As part the head gasket replacement project, I
need to address a wallowed-out and stripped cylinder head
stud hole in the block.</div>
<div class="">(If you were standing on the manifold side of
the engine, it would be the one furtherest to the front, on
the manifold side.)</div>
<div class=""><br class="">
</div>
<div class="">A stud goes in straight up and down until the
top of the threads are even with the block, but it wiggles
like hell.</div>
<div class="">As you tighten the stud down further, the wiggle
starts to go away, but the whole thing starts to cant back
toward the rear of the block.</div>
<div class="">This make it impossible to slide the head down
over the canted stud.</div>
<div class=""><br class="">
</div>
<div class="">To fix this I intend to install a coiled insert.
(drill just 1/32” oversized, tap, install insert).</div>
<div class="">I am hoping that someone from the list knows of
a drilling jig/guide for the drilling phase.</div>
<div class="">I know better than to attempt drilling out cast
iron without a steadying device of some sort.</div>
<div class=""><br class="">
</div>
<div class="">Any and all tips and advice are welcome.</div>
<div class=""><br class="">
</div>
<div class="">The hole is 1 5/16” deep, and the threads of the
stud measure 3/4”.</div>
<div class="">It is basically threaded top to bottom.</div>
<div class=""><br class="">
</div>
<div class="">Thanks in advance.</div>
<div class="">I hate it when you have to fix the unknown thing
to fix the known thing.</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">
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letter-spacing:normal; text-align:start;
text-indent:0px; text-transform:none;
white-space:normal; word-spacing:0px">
Kind Regards,<br class="">
<br class="">
Guy D. Huggins<br class="">
<a href="mailto:guy.huggins@icloud.com"
class="moz-txt-link-freetext"
moz-do-not-send="true">guy.huggins@icloud.com</a><br
class="">
817.454.6415</div>
<div class="" style="color:rgb(0,0,0);
font-family:Helvetica; font-size:14px;
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<br class="">
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<br class="x_Apple-interchange-newline">
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<br>
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</blockquote>
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