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Correct Perry.=C2=A0 I was confusing the fine thread count of a BSF thread=
to a UNF thread.=C2=A0 I just can't get away with anything with you guys.=
=C2=A0 Thankfully.Mike MacLean
On Sunday, May 10, 2020, 11:41:21 AM PDT, Perry <healeyguy@aol.com> wro=
te: =20
=20
#yiv4621312562 #yiv4621312562 -- _filtered {} _filtered {} _filtered {}#yi=
v4621312562 #yiv4621312562 p.yiv4621312562MsoNormal, #yiv4621312562 li.yiv4=
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2 a:link, #yiv4621312562 span.yiv4621312562MsoHyperlink {color:blue;text-de=
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OK I got confused on this exchanged.=C2=A0 Regarding the UNF threads, my in=
fo shows the 3/8 (major diameter) UNF bolt as having 24 threads per inch. T=
he exchange mentioned 20 TPI
Perry
=C2=A0
From: Michael Salter
Subject: Re: [Healeys] Motor Mout Bolts
=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 the engine bay are UNF."
I think that may be a stretch Mike ... I know, for example, that the nuts w=
elded 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 fo=
r your car before running a tap through any.
=C2=A0
M
=C2=A0
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.=C2=A0=
Because it was the same in all eight 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. S=
o, I take it all threaded holes in the engine bay are UNF.=C2=A0 Certainly =
simplifies it.
Mike MacLean
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.=C2=A0 If they ever were BSF, it w=
as very early in BN1 production.=C2=A0
=C2=A0
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 fastener=
s.=20
Its one of those areas of the car that if I ended up with damage to the wel=
ded 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.=20
Perry
=C2=A0
From: Michael MacLean
=C2=A0
Are the bolts that fasten the motor mounts to the frame different threads b=
etween the BN1 and the BN2?
Mike MacLean
=C2=A0
=20
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<html><head></head><body><div class=3D"ydpc8aa077eyahoo-style-wrap" style=
=3D"font-family:times new roman, new york, times, serif;font-size:16px;"><d=
iv></div>
<div dir=3D"ltr" data-setdir=3D"false">Correct Perry. I was c=
onfusing the fine thread count of a BSF thread to a UNF thread. I jus=
t can't get away with anything with you guys. Thankfully.</div><div d=
ir=3D"ltr" data-setdir=3D"false">Mike MacLean<br></div><div><br></div>
=20
</div><div id=3D"yahoo_quoted_9483551479" class=3D"yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Sunday, May 10, 2020, 11:41:21 AM PDT, Perry <hea=
leyguy@aol.com> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id=3D"yiv4621312562"><style>#yiv4621312562 #yiv46=
21312562 --
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f;}
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=09{}
#yiv4621312562 </style><div><div class=3D"yiv4621312562WordSection1"><p cla=
ss=3D"yiv4621312562MsoNormal">OK I got confused on this exchanged. Re=
garding the UNF threads, my info shows the 3/8 (major diameter) UNF bolt as=
having 24 threads per inch. The exchange mentioned 20 TPI</p><p class=3D"y=
iv4621312562MsoNormal">Perry</p><p class=3D"yiv4621312562MsoNormal"> =
</p><div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt =
0in 0in 0in;"><div class=3D"yiv4621312562yqt0788660123" id=3D"yiv4621312562=
yqtfd05002"><p class=3D"yiv4621312562MsoNormal" style=3D"border:none;paddin=
g:0in;"><b>From: </b><a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:m=
ichaelsalter@gmail.com" target=3D"_blank" href=3D"mailto:michaelsalter@gmai=
l.com">Michael Salter</a><br clear=3D"none"><b>Subject: </b>Re: [Healeys] M=
otor Mout Bolts</p></div></div><div class=3D"yiv4621312562yqt0788660123" id=
=3D"yiv4621312562yqtfd98535"><p class=3D"yiv4621312562MsoNormal"> </p=
><div><div><p class=3D"yiv4621312562MsoNormal"><b><i><span style=3D"font-si=
ze:12.0pt;">"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."</span>=
</i></b><span style=3D"font-size:12.0pt;"></span></p></div><div><p class=3D=
"yiv4621312562MsoNormal"><span style=3D"font-size:12.0pt;">I think that may=
be a stretch Mike ... I know, for example, that the nuts welded into the f=
rame for the battery hold down rods changed from BSF to UNF as C.#156839. I=
would bet that there are other instances of this.</span></p></div><div><p =
class=3D"yiv4621312562MsoNormal"><span style=3D"font-size:12.0pt;">I would =
always recommend checking your parts book for the correct thread for your c=
ar before running a tap through any.</span></p></div><div><p class=3D"yiv46=
21312562MsoNormal"><span style=3D"font-size:12.0pt;"> </span></p></di=
v><div><p class=3D"yiv4621312562MsoNormal"><span style=3D"font-size:12.0pt;=
">M</span></p></div></div><p class=3D"yiv4621312562MsoNormal"> </p><d=
iv><div><p class=3D"yiv4621312562MsoNormal">On Sun, May 10, 2020 at 12:50 P=
M Michael MacLean <<a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:=
rrengineer.mike@att.net" target=3D"_blank" href=3D"mailto:rrengineer.mike@a=
tt.net">rrengineer.mike@att.net</a>> wrote:</p></div><blockquote style=
=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;m=
argin-left:4.8pt;margin-right:0in;"><p class=3D"yiv4621312562MsoNormal">The=
only reason I asked this question in the first place was because a 3/8" UN=
F bolt screwed into all eight holes for a few threads and stopped. Be=
cause 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 simp=
lifies it.</p><div id=3D"yiv4621312562gmail-m_-5974905000147687713yMail_cur=
sorElementTracker_1589129381257"><p class=3D"yiv4621312562MsoNormal" style=
=3D"margin-bottom:12.0pt;">Mike MacLean</p><blockquote style=3D"margin-left=
:0in;margin-right:0in;margin-bottom:15.0pt;"><div><div><p class=3D"yiv46213=
12562MsoNormal"><span style=3D"">On Sun, May 10, 2020 at 8:51 AM, Curtis Ar=
ndt</span></p></div><div><p class=3D"yiv4621312562MsoNormal"><span style=3D=
""><<a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:cnaarndt@gmail.=
com" target=3D"_blank" href=3D"mailto:cnaarndt@gmail.com";>cnaarndt@gmail.co=
m</a>> wrote:</span></p></div></div><div style=3D"border:none;border-lef=
t:solid #6D00F6 1.0pt;padding:0in 0in 0in 15.0pt;margin-top:7.5pt;"><div id=
=3D"yiv4621312562gmail-m_-5974905000147687713yiv7438463404"><div><p class=
=3D"yiv4621312562MsoNormal">They are UNF on my BN1 built 11 Jan. '55. =
If they ever were BSF, it was very early in BN1 production. </p></div=
><p class=3D"yiv4621312562MsoNormal"> </p><div><div><p class=3D"yiv46=
21312562MsoNormal">On Sat, May 9, 2020, 16:54 Perry via Healeys <<a rel=
=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:healeys@autox.team.net"; targ=
et=3D"_blank" href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net=
</a>> wrote:</p></div><blockquote style=3D"border:none;border-left:solid=
#CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in=
;"><div><div><p>Michael</p><p>There was a slow switch from BSF to UNF faste=
ners 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 en=
gine mount to chassis fasteners. </p><p>Its one of those areas of the car t=
hat if I ended up with damage to the welded nut threads that could not be c=
leaned up with a tap I would do what was necessary to secure the engine mou=
nt short of replacing the welded nut. </p><p>Perry</p><p> </p><div sty=
le=3D"border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0=
in;border-color:currentcolor currentcolor;"><p><b>From: </b><a rel=3D"nofol=
low" shape=3D"rect" ymailto=3D"mailto:rrengineer.mike@att.net"; target=3D"_b=
lank" href=3D"mailto:rrengineer.mike@att.net";>Michael MacLean</a><br clear=
=3D"none"><br clear=3D"none"></p></div><p> </p><p>Are the bolts that f=
asten the motor mounts to the frame different threads between the BN1 and t=
he BN2?</p><div id=3D"yiv4621312562gmail-m_-5974905000147687713yiv743846340=
4m_8389926694834509769yMail_cursorElementTracker_1589058832618"><p style=3D=
"margin-bottom:12.0pt;">Mike MacLean</p></div></div></div></blockquote></di=
v></div></div></blockquote></div></blockquote></div><p class=3D"yiv46213125=
62MsoNormal"> </p></div></div></div></div></div>
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