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Re: [TR] 1965 TR4A - Looking to drill out a stud hole in block. Need rec

To: Guy Huggins <guy.huggins@icloud.com>
Subject: Re: [TR] 1965 TR4A - Looking to drill out a stud hole in block. Need recommendations on a drill guide/jig.
From: Jeff Scarbrough <fishplate@gmail.com>
Date: Mon, 13 Dec 2021 06:28:15 -0500
Cc: Triumph Mailing List <triumphs@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <D005E20C-4362-4150-811B-93C8420A6179@icloud.com>
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I've been thinking of a flat plate with a tube welded to it.  Tube has the
ID of the drill you intend to use.  Put holes in the plate such that it can
be bolted to the good holes in the block.  Length of tube determines depth
of hole.

Kind of expensive for a solution you only need once....

If you had some help, a couple of machinist squares could guide you, and
tape on the bit controls depth.  If you're slightly off, you put that stud
in after the head is on.

On Sat, Dec 11, 2021, 18:35 Guy Huggins <guy.huggins@icloud.com> wrote:

> Howdy All,
>
> As part the head gasket replacement project, I need to address a
> wallowed-out and stripped cylinder head stud hole in the block.
> (If you were standing on the manifold side of the engine, it would be the
> one furtherest to the front, on the manifold side.)
>
> A stud goes in straight up and down until the top of the threads are even
> with the block, but it wiggles like hell.
> 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.
> This make it impossible to slide the head down over the canted stud.
>
> To fix this I intend to install a coiled insert.  (drill just 1/32=E2=80=
=9D
> oversized, tap, install insert).
> I am hoping that someone from the list knows of a drilling jig/guide for
> the drilling phase.
> I know better than to attempt drilling out cast iron without a steadying
> device of some sort.
>
> Any and all tips and advice are welcome.
>
> The hole is 1 5/16=E2=80=9D deep, and the threads of the stud measure 3/4=
=E2=80=9D.
> It is basically threaded top to bottom.
>
> Thanks in advance.
> I hate it when you have to fix the unknown thing to fix the known thing.
>
>
> Kind Regards,
>
> Guy D. Huggins
> guy.huggins@icloud.com
> 817.454.6415
>
>
>
>
>
> ** triumphs@autox.team.net **
>
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<div dir=3D"auto">I&#39;ve been thinking of a flat plate with a tube welded=
 to it.=C2=A0 Tube has the ID of the drill you intend to use.=C2=A0 Put hol=
es in the plate such that it can be bolted to the good holes in the block.=
=C2=A0 Length of tube determines depth of hole.<div dir=3D"auto"><br></div>=
<div dir=3D"auto">Kind of expensive for a solution you only need once....</=
div><div dir=3D"auto"><br></div><div dir=3D"auto">If you had some help, a c=
ouple of machinist squares could guide you, and tape on the bit controls de=
pth.=C2=A0 If you&#39;re slightly off, you put that stud in after the head =
is on.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"=
gmail_attr">On Sat, Dec 11, 2021, 18:35 Guy Huggins &lt;<a href=3D"mailto:g=
uy.huggins@icloud.com">guy.huggins@icloud.com</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break:aft=
er-white-space">Howdy All,<div><br></div><div>As part the head gasket repla=
cement project, I need to address a wallowed-out and stripped cylinder head=
 stud hole in the block.</div><div>(If you were standing on the manifold si=
de of the engine, it would be the one furtherest to the front, on the manif=
old side.)</div><div><br></div><div>A stud goes in straight up and down unt=
il the top of the threads are even with the block, but it wiggles like hell=
.</div><div>As you tighten the stud down further, the wiggle starts to go a=
way, but the whole thing starts to cant back toward the rear of the block.<=
/div><div>This make it impossible to slide the head down over the canted st=
ud.</div><div><br></div><div>To fix this I intend to install a coiled inser=
t. =C2=A0(drill just 1/32=E2=80=9D oversized, tap, install insert).</div><d=
iv>I am hoping that someone from the list knows of a drilling jig/guide for=
 the drilling phase.</div><div>I know better than to attempt drilling out c=
ast iron without a steadying device of some sort.</div><div><br></div><div>=
Any and all tips and advice are welcome.</div><div><br></div><div>The hole =
is 1 5/16=E2=80=9D deep, and the threads of the stud measure 3/4=E2=80=9D.<=
/div><div>It is basically threaded top to bottom.</div><div><br></div><div>=
Thanks in advance.</div><div>I hate it when you have to fix the unknown thi=
ng to fix the known thing.</div><div><br></div><div><br></div><div><div>
<div style=3D"color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wra=
p:break-word;line-break:after-white-space"><div style=3D"word-wrap:break-wo=
rd;line-break:after-white-space"><div style=3D"color:rgb(0,0,0);font-family=
:Helvetica;font-size:14px;font-style:normal;font-variant-caps:normal;font-w=
eight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-tr=
ansform:none;white-space:normal;word-spacing:0px">Kind Regards,<br><br>Guy =
D. Huggins<br><a href=3D"mailto:guy.huggins@icloud.com"; target=3D"_blank" r=
el=3D"noreferrer">guy.huggins@icloud.com</a><br>817.454.6415</div><div styl=
e=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:14px;font-style:norma=
l;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-al=
ign:start;text-indent:0px;text-transform:none;white-space:normal;word-spaci=
ng:0px"><br></div><br></div></div><br><br>
</div>
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</blockquote></div>

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