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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72" style=3D=
'word-wrap:break-word'><div class=3DWordSection1><p class=3DMsoNormal>I hav=
e a bit of machining experience and I would not attempt this on my own. I=
=E2=80=99m guessing that the oil pan flange and the head are parallel; they=
certainly should be. A machinist can take the block and set it on a mill o=
r drill press table which should be perpendicular to the drill axis and dri=
ll the hole oversize to accept the insert of your choice. But as another sa=
id have the block checked to be certain the current hole is not cracked. Fi=
x it correctly and don=E2=80=99t look back. </p><p class=3DMsoNormal><o:p>&=
nbsp;</o:p></p><p class=3DMsoNormal>Another method might be to use a magnet=
ic drill base set up on the block surface making certain the drill is perpe=
ndicular to the block face. Positioning the drill correctly will take some =
skill that a good machinist would have.</p><p class=3DMsoNormal><o:p> =
</o:p></p><p class=3DMsoNormal>JVV </p><p class=3DMsoNormal><o:p> </o:=
p></p><p class=3DMsoNormal>Sent from <a href=3D"https://go.microsoft.com/fw=
link/?LinkId=3D550986">Mail</a> for Windows</p><p class=3DMsoNormal><o:p>&n=
bsp;</o:p></p><div style=3D'mso-element:para-border-div;border:none;border-=
top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal sty=
le=3D'border:none;padding:0in'><b>From: </b><a href=3D"mailto:dconnitt@fuse=
.net">Dave Connitt</a><br><b>Sent: </b>Monday, December 13, 2021 6:22 PM<br=
><b>To: </b><a href=3D"mailto:guy.huggins@icloud.com";>Guy Huggins</a><br><b=
>Cc: </b><a href=3D"mailto:triumphs@autox.team.net";>Triumph Mailing List</a=
><br><b>Subject: </b>Re: [TR] 1965 TR4A - Looking to drill out a stud hole =
in block. Need recommendations on a drill guide/jig.</p></div><p class=3DMs=
oNormal><o:p> </o:p></p><p class=3DMsoNormal>Hello Guy,<o:p></o:p></p>=
<div><p class=3DMsoNormal>That is a tough one. Have you considered talking =
this over with the machinist that did your cylinder head as he may ha=
ve come across this type of issue before. I agree with you that locating an=
d holding the X, Y and Z positions of the repair is critical. <o:p></o=
:p></p></div><div><p class=3DMsoNormal>Best of luck to you.<o:p></o:p></p><=
/div><div><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>Dave Connitt&=
nbsp;<o:p></o:p></p><div><p class=3DMsoNormal>Sent from my iPhone<o:p></o:p=
></p></div><div><p class=3DMsoNormal><br><br><o:p></o:p></p><blockquote sty=
le=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'm=
argin-bottom:12.0pt'>On Dec 11, 2021, at 6:35 PM, Guy Huggins <guy.huggi=
ns@icloud.com> wrote:<o:p></o:p></p></blockquote></div><blockquote style=
=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=3DMsoNormal>=EF=BB=
=BFHowdy All,<o:p></o:p></p><div><p class=3DMsoNormal><o:p> </o:p></p>=
</div><div><p class=3DMsoNormal>As part the head gasket replacement project=
, I need to address a wallowed-out and stripped cylinder head stud hole in =
the block.<o:p></o:p></p></div><div><p class=3DMsoNormal>(If you were stand=
ing on the manifold side of the engine, it would be the one furtherest to t=
he front, on the manifold side.)<o:p></o:p></p></div><div><p class=3DMsoNor=
mal><o:p> </o:p></p></div><div><p class=3DMsoNormal>A stud goes in str=
aight up and down until the top of the threads are even with the block, but=
it wiggles like hell.<o:p></o:p></p></div><div><p class=3DMsoNormal>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.<o:p></o:p></p></di=
v><div><p class=3DMsoNormal>This make it impossible to slide the head down =
over the canted stud.<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&n=
bsp;</o:p></p></div><div><p class=3DMsoNormal>To fix this I intend to insta=
ll a coiled insert. (drill just 1/32=E2=80=9D oversized, tap, install=
insert).<o:p></o:p></p></div><div><p class=3DMsoNormal>I am hoping that so=
meone from the list knows of a drilling jig/guide for the drilling phase.<o=
:p></o:p></p></div><div><p class=3DMsoNormal>I know better than to attempt =
drilling out cast iron without a steadying device of some sort.<o:p></o:p><=
/p></div><div><p class=3DMsoNormal><o:p> </o:p></p></div><div><p class=
=3DMsoNormal>Any and all tips and advice are welcome.<o:p></o:p></p></div><=
div><p class=3DMsoNormal><o:p> </o:p></p></div><div><p class=3DMsoNorm=
al>The hole is 1 5/16=E2=80=9D deep, and the threads of the stud measure 3/=
4=E2=80=9D.<o:p></o:p></p></div><div><p class=3DMsoNormal>It is basically t=
hreaded top to bottom.<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&=
nbsp;</o:p></p></div><div><p class=3DMsoNormal>Thanks in advance.<o:p></o:p=
></p></div><div><p class=3DMsoNormal>I hate it when you have to fix the unk=
nown thing to fix the known thing.<o:p></o:p></p></div><div><p class=3DMsoN=
ormal><o:p> </o:p></p></div><div><p class=3DMsoNormal><o:p> </o:p=
></p></div><div><div><div><div><div><p class=3DMsoNormal><span style=3D'fon=
t-size:10.5pt;font-family:"Helvetica",sans-serif;color:black'>Kind Regards,=
<br><br>Guy D. Huggins<br><a href=3D"mailto:guy.huggins@icloud.com";>guy.hug=
gins@icloud.com</a><br>817.454.6415<o:p></o:p></span></p></div><div><p clas=
s=3DMsoNormal><span style=3D'font-size:10.5pt;font-family:"Helvetica",sans-=
serif;color:black'><o:p> </o:p></span></p></div><p class=3DMsoNormal><=
span style=3D'color:black'><o:p> </o:p></span></p></div></div><p class=
=3DMsoNormal style=3D'margin-bottom:12.0pt'><o:p> </o:p></p></div><p c=
lass=3DMsoNormal><o:p> </o:p></p></div></div></blockquote></div><p cla=
ss=3DMsoNormal style=3D'mso-margin-top-alt:0in;margin-right:.5in;margin-bot=
tom:5.0pt;margin-left:.5in'>** triumphs@autox.team.net **<br><br>Donate: ht=
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