<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">Yes, they did. Plus the steel studs in an aluminum head on an engine notorious for leaky head gaskets can make for a very difficult head removal. The Wedge club has a special tool to assist in head removal if anyone encounters this issue. Yet another reason to join.</font></div>
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<div><font size="3">Back to our regularly scheduled program.</font></div>
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<div><font size="3">Drilling the hole true (90 deg) is important but more so is getting the tap started true. I typically use a tap guide. This is an aluminum block with critically sized holes drilled true (using a drill press) that will keep the tap aligned whilst getting started. Square tubing can also be used.</font><br>
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<div style="clear:both"><font size="4">Dave </font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: David P <frogeye@porterscustom.com><br>
To: triumphs@autox.team.net<br>
Sent: Mon, Dec 13, 2021 8:42 am<br>
Subject: Re: [TR] 1965 TR4A - Looking to drill out a stud hole in block. Need recommendations on a drill guide/jig.<br>
<br>
<div id="yiv5394862257">
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<div>... 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 clear="none">
</div>
<div id="yiv5394862257yqtfd36688" class="yiv5394862257yqt7812892194">
<div class="yiv5394862257moz-cite-prefix">On 12/13/2021 7:08 AM, Randy and
Valerie DeRuiter wrote:<br clear="none">
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Guy-</div>
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<div style="font-family:Calibri, Helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);">
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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<div style="font-family:Calibri, Helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);">
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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Randy</div>
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<div dir="ltr" id="yiv5394862257divRplyFwdMsg"><font style="font-size:11pt;" face="Calibri, sans-serif" color="#000000"><b>From:</b>
Triumphs <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:triumphs-bounces@autox.team.net" target="_blank" href="mailto:triumphs-bounces@autox.team.net" class="yiv5394862257moz-txt-link-rfc2396E"><triumphs-bounces@autox.team.net></a> on behalf
of Guy Huggins <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:guy.huggins@icloud.com" target="_blank" href="mailto:guy.huggins@icloud.com" class="yiv5394862257moz-txt-link-rfc2396E"><guy.huggins@icloud.com></a><br clear="none">
<b>Sent:</b> Saturday, December 11, 2021 5:28 PM<br clear="none">
<b>To:</b> Triumph Mailing List
<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:triumphs@autox.team.net" target="_blank" href="mailto:triumphs@autox.team.net" class="yiv5394862257moz-txt-link-rfc2396E"><triumphs@autox.team.net></a><br clear="none">
<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 style="word-wrap:break-word;" class="yiv5394862257">Howdy All,
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257">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="yiv5394862257">(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="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257">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="yiv5394862257">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="yiv5394862257">This make it impossible to slide the head down
over the canted stud.</div>
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257">To fix this I intend to install a coiled insert.
(drill just 1/32” oversized, tap, install insert).</div>
<div class="yiv5394862257">I am hoping that someone from the list knows of
a drilling jig/guide for the drilling phase.</div>
<div class="yiv5394862257">I know better than to attempt drilling out cast
iron without a steadying device of some sort.</div>
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257">Any and all tips and advice are welcome.</div>
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257">The hole is 1 5/16” deep, and the threads of the
stud measure 3/4”.</div>
<div class="yiv5394862257">It is basically threaded top to bottom.</div>
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257">Thanks in advance.</div>
<div class="yiv5394862257">I hate it when you have to fix the unknown thing
to fix the known thing.</div>
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
</div>
<div class="yiv5394862257"><br class="yiv5394862257" clear="none">
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Kind Regards,<br class="yiv5394862257" clear="none">
<br class="yiv5394862257" clear="none">
Guy D. Huggins<br class="yiv5394862257" clear="none">
<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:guy.huggins@icloud.com" target="_blank" href="mailto:guy.huggins@icloud.com" class="yiv5394862257moz-txt-link-freetext">guy.huggins@icloud.com</a><br class="yiv5394862257" clear="none">
817.454.6415</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;" class="yiv5394862257">
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