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*"So, now I can run a 3/8 - 20 UNF tap through the hole to clean it up.
So, I take it all threaded holes in the engine bay are UNF."*
I think that may be a stretch Mike ... I know, for example, that the nuts
welded into the frame for the battery hold down rods changed from BSF to
UNF as C.#156839. I would bet that there are other instances of this.
I would always recommend checking your parts book for the correct thread
for your car before running a tap through any.
M
On Sun, May 10, 2020 at 12:50 PM Michael MacLean <rrengineer.mike@att.net>
wrote:
> The only reason I asked this question in the first place was because a
> 3/8" UNF bolt screwed into all eight holes for a few threads and stopped.
> Because it was the same in all eight holes I did not want to force it. So,
> now I can run a 3/8 - 20 UNF tap through the hole to clean it up. So, I
> take it all threaded holes in the engine bay are UNF. Certainly simplifies
> it.
> Mike MacLean
>
> Sent from AT&T Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
> On Sun, May 10, 2020 at 8:51 AM, Curtis Arndt
> <cnaarndt@gmail.com> wrote:
> They are UNF on my BN1 built 11 Jan. '55. If they ever were BSF, it was
> very early in BN1 production.
>
> On Sat, May 9, 2020, 16:54 Perry via Healeys <healeys@autox.team.net>
> wrote:
>
> Michael
>
> There was a slow switch from BSF to UNF fasteners used and threads on some
> parts starting about mid 1954 through the end of 1955 at several locations
> on the 100. However I can not speak to the engine mount to chassis
> fasteners.
>
> Its one of those areas of the car that if I ended up with damage to the
> welded nut threads that could not be cleaned up with a tap I would do what
> was necessary to secure the engine mount short of replacing the welded nut.
>
> Perry
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *Michael MacLean <rrengineer.mike@att.net>
> *Sent: *Saturday, May 9, 2020 5:14 PM
> *To: *Healeys <healeys@autox.team.net>
> *Subject: *[Healeys] Motor Mout Bolts
>
>
>
> Are the bolts that fasten the motor mounts to the frame different threads
> between the BN1 and the BN2?
>
> Mike MacLean
>
> Sent from AT&T Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
>
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">
<b><i>"So, now I can run a 3/8 - 20 UNF tap through the hole to clean =
it up.=20
So, I take it all threaded holes in the engine bay are UNF."</i></b></=
div><div class=3D"gmail_default" style=3D"font-family:comic sans ms,sans-se=
rif;font-size:small">I think that may be a stretch Mike ... I know, for exa=
mple, that the nuts welded into the frame for the battery hold down rods ch=
anged from BSF to UNF as C.#156839. I would bet that there are other instan=
ces of this.</div><div class=3D"gmail_default" style=3D"font-family:comic s=
ans ms,sans-serif;font-size:small">I would always recommend checking your p=
arts book for the correct thread for your car before running a tap through =
any.</div><div class=3D"gmail_default" style=3D"font-family:comic sans ms,s=
ans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"=
font-family:comic sans ms,sans-serif;font-size:small">M<br></div></div><br>=
<div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Ma=
y 10, 2020 at 12:50 PM Michael MacLean <<a href=3D"mailto:rrengineer.mik=
e@att.net">rrengineer.mike@att.net</a>> wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex">The only reason I asked this question in =
the first place was because a 3/8" UNF bolt screwed into all eight hol=
es for a few threads and stopped.=C2=A0 Because it was the same in all eigh=
t holes I did not want to force it.=C2=A0 So, now I can run a 3/8 - 20 UNF =
tap through the hole to clean it up. So, I take it all threaded holes in th=
e engine bay are UNF.=C2=A0 Certainly simplifies it.<div id=3D"gmail-m_-597=
4905000147687713yMail_cursorElementTracker_1589129381257">Mike MacLean<br><=
br><div id=3D"gmail-m_-5974905000147687713ymail_android_signature"><a id=3D=
"gmail-m_-5974905000147687713ymail_android_signature_link" href=3D"https://=
go.onelink.me/107872968?pid=3DInProduct&c=3DGlobal_Internal_YGrowth_And=
roidEmailSig__AndroidUsers&af_wl=3Dym&af_sub1=3DInternal&af_sub=
2=3DGlobal_YGrowth&af_sub3=3DEmailSignature" target=3D"_blank">Sent fro=
m AT&T Yahoo Mail on Android</a></div> <br> <blockquote style=3D"margin=
:0px 0px 20px"> <div style=3D"font-family:Roboto,sans-serif;color:rgb(109,0=
,246)"> <div>On Sun, May 10, 2020 at 8:51 AM, Curtis Arndt</div><div><<a=
href=3D"mailto:cnaarndt@gmail.com"; target=3D"_blank">cnaarndt@gmail.com</a=
>> wrote:</div> </div> <div style=3D"padding:10px 0px 0px 20px;margin:10=
px 0px 0px;border-left:1px solid rgb(109,0,246)"> <div id=3D"gmail-m_-59749=
05000147687713yiv7438463404"><div>They are UNF on my BN1 built 11 Jan. '=
;55.=C2=A0 If they ever were BSF, it was very early in BN1 production.=C2=
=A0</div><br><div><div dir=3D"ltr">On Sat, May 9, 2020, 16:54 Perry via Hea=
leys <<a rel=3D"nofollow" href=3D"mailto:healeys@autox.team.net"; target=
=3D"_blank">healeys@autox.team.net</a>> wrote:<br></div><blockquote styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex"><div lang=3D"EN-US"><div><p>Michael</p><p>There was a slow swit=
ch from BSF to UNF fasteners used and threads on some parts starting about =
mid 1954 through the end of 1955 at several locations on the 100. However I=
can not speak to the engine mount to chassis fasteners. </p><p>Its one of =
those areas of the car that if I ended up with damage to the welded nut thr=
eads that could not be cleaned up with a tap I would do what was necessary =
to secure the engine mount short of replacing the welded nut. </p><p>Perry<=
/p><p><u></u>=C2=A0<u></u></p><p>Sent from <a rel=3D"nofollow" href=3D"http=
s://go.microsoft.com/fwlink/?LinkId=3D550986" target=3D"_blank">Mail</a> fo=
r Windows 10</p><p><u></u>=C2=A0<u></u></p><div style=3D"border-color:rgb(2=
25,225,225) currentcolor currentcolor;border-style:solid none none;border-w=
idth:1pt medium medium;padding:3pt 0in 0in"><p style=3D"border:medium none;=
padding:0in"><b>From: </b><a rel=3D"nofollow" href=3D"mailto:rrengineer.mik=
e@att.net" target=3D"_blank">Michael MacLean</a><br><b>Sent: </b>Saturday, =
May 9, 2020 5:14 PM<br><b>To: </b><a rel=3D"nofollow" href=3D"mailto:healey=
s@autox.team.net" target=3D"_blank">Healeys</a><br><b>Subject: </b>[Healeys=
] Motor Mout Bolts</p></div><p><u></u>=C2=A0<u></u></p><p>Are the bolts tha=
t fasten the motor mounts to the frame different threads between the BN1 an=
d the BN2?<u></u><u></u></p><div id=3D"gmail-m_-5974905000147687713yiv74384=
63404m_8389926694834509769yMail_cursorElementTracker_1589058832618"><p styl=
e=3D"margin-bottom:12pt">Mike MacLean<u></u><u></u></p></div><p><a rel=3D"n=
ofollow" href=3D"https://go.onelink.me/107872968?pid=3DInProduct&c=3DGl=
obal_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=3Dym&af_s=
ub1=3DInternal&af_sub2=3DGlobal_YGrowth&af_sub3=3DEmailSignature" t=
arget=3D"_blank">Sent from AT&T Yahoo Mail on Android</a></p><p><u></u>=
=C2=A0<u></u></p></div></div>______________________________________________=
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