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...you=E2=80=99re really not going to do any harm tapping the mounting hole=
s. Just use the smallest diameter that you can to thread the existing holes=
. The alloy is no softer than eg an aluminium sump as per MG T type, which =
have tapped holes where the bolts do have to be done up tightly. And you=E2=
=80=99re not (I assume) going to be taking the filters on and off every 5 m=
inutes! I think the reduction in aggravation when you do have to remove the=
m is well worth it!
Cheers
Peter Linn
Brisbane Oz
Austin Healey 100 V6
MG TC/Q type replica
Sent from Mail for Windows 10
From: Michael Salter
Sent: Friday, 23 November 2018 6:47 AM
Cc: healeys@autox.team.net
Subject: Re: [Healeys] Tapping SUs for air filters.
Better still get some of these:
https://mossmotors.com/bracket-rear-air-cleaner?assoc=3D19384
On Thu, Nov 22, 2018, 12:48 PM Bob Spidell <bspidell@comcast.net wrote:
I've not tried this, but my first thought is that the aluminium bodies of t=
he SUs would be too soft; eventually, you might strip the threads (esp. if =
trying to get a good seal with the filter).=C2=A0 Why not do what you're li=
kely to end up doing anyway: installing thread inserts (Helicoil or similar=
).=C2=A0 I think 5/16" bolts would be sufficient.
Bob
On 11/22/2018 6:15 AM, simon.lachlan@alexarevel.plus.com wrote:
I=E2=80=99ll be removing my carbs soon in order to achieve clearance for ra=
ising (the front of) the engine. (Harmonic balancer installation).
So, it struck me that I may give my 3 HD6s another go. Swap them with the c=
urrent setup.
Thinking it through and looking at the big box of bits, I recalled what a p=
ain it is to get the nuts and two washers onto the bolts that hold on the a=
ir filters. I have French manufactured K&N lookalikes. The bolt starts insi=
de the filter, goes through the carb and gets two washers and a nut. Very a=
wkward to deal with those nuts and washers. PITA.
I thought that I might put in helicoils then I thought =E2=80=9CWhy not tap=
the holes?=E2=80=9D
The holes on my HD6s are 11/32=E2=80=9D or 8.8mm.
I am no engineer but it seems to me, from looking at tables on Google, that=
I could use a 25/64=E2=80=9D drill bit and tap them out to 7/16=E2=80=9D. =
I have both the drill and the tap but would like some expertise applied to =
the issue before I start drilling.
Any input would be much appreciated.
Thanks,
Simon
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--></style></head><body lang=3DEN-AU link=3Dblue vlink=3D"#954F72"><div cla=
ss=3DWordSection1><p class=3DMsoNormal>...you=E2=80=99re really not going t=
o do any harm tapping the mounting holes. Just use the smallest diameter th=
at you can to thread the existing holes. The alloy is no softer than eg an =
aluminium sump as per MG T type, which have tapped holes where the bolts do=
have to be done up tightly. And you=E2=80=99re not (I assume) going to be =
taking the filters on and off every 5 minutes! I think the reduction in agg=
ravation when you do have to remove them is well worth it!<br><br>Cheers</p=
><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Peter Linn<=
/p><p class=3DMsoNormal>Brisbane Oz</p><p class=3DMsoNormal><o:p> </o:=
p></p><p class=3DMsoNormal>Austin Healey 100 V6</p><p class=3DMsoNormal>MG =
TC/Q type replica</p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DM=
soNormal>Sent from <a href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550=
986">Mail</a> for Windows 10</p><p class=3DMsoNormal><o:p> </o:p></p><=
div style=3D'mso-element:para-border-div;border:none;border-top:solid #E1E1=
E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'border:no=
ne;padding:0cm'><b>From: </b><a href=3D"mailto:michael.salter@gmail.com";>Mi=
chael Salter</a><br><b>Sent: </b>Friday, 23 November 2018 6:47 AM<br><b>Cc:=
</b><a href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a><b=
r><b>Subject: </b>Re: [Healeys] Tapping SUs for air filters.</p></div><p cl=
ass=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal>Better still=
get some of these:</p><div><p class=3DMsoNormal><o:p> </o:p></p></div=
><div><p class=3DMsoNormal><a href=3D"https://mossmotors.com/bracket-rear-a=
ir-cleaner?assoc=3D19384">https://mossmotors.com/bracket-rear-air-cleaner?a=
ssoc=3D19384</a></p></div></div><p class=3DMsoNormal><o:p> </o:p></p><=
div><div><p class=3DMsoNormal>On Thu, Nov 22, 2018, 12:48 PM Bob Spidell &l=
t;<a href=3D"mailto:bspidell@comcast.net";>bspidell@comcast.net</a> wrote:</=
p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;pa=
dding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><p>I've no=
t tried this, but my first thought is that the aluminium bodies of the SUs =
would be too soft; eventually, you might strip the threads (esp. if trying =
to get a good seal with the filter). Why not do what you're likely to=
end up doing anyway: installing thread inserts (Helicoil or similar). =
; I think 5/16" bolts would be sufficient.</p><p>Bob</p><div><p class=
=3DMsoNormal>On 11/22/2018 6:15 AM, <a href=3D"mailto:simon.lachlan@alexare=
vel.plus.com" target=3D"_blank">simon.lachlan@alexarevel.plus.com</a> wrote=
:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bottom:5=
.0pt'><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto'>I=E2=80=99ll be removing my carbs soon in order to achiev=
e clearance for raising (the front of) the engine. (Harmonic balancer insta=
llation).</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:auto'>So, it struck me that I may give my 3 HD6s another go. =
Swap them with the current setup.</p><p class=3DMsoNormal style=3D'mso-marg=
in-top-alt:auto;mso-margin-bottom-alt:auto'>Thinking it through and looking=
at the big box of bits, I recalled what a pain it is to get the nuts and t=
wo washers onto the bolts that hold on the air filters. I have French manuf=
actured K&N lookalikes. The bolt starts inside the filter, goes through=
the carb and gets two washers and a nut. Very awkward to deal with those n=
uts and washers. PITA.</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:=
auto;mso-margin-bottom-alt:auto'>I thought that I might put in helicoils th=
en I thought =E2=80=9CWhy not tap the holes?=E2=80=9D</p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The holes o=
n my HD6s are 11/32=E2=80=9D or 8.8mm.</p><p class=3DMsoNormal style=3D'mso=
-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I am no engineer but it se=
ems to me, from looking at tables on Google, that I could use a 25/64=E2=80=
=9D drill bit and tap them out to 7/16=E2=80=9D. I have both the drill and =
the tap but would like some expertise applied to the issue before I start d=
rilling.</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margi=
n-bottom-alt:auto'>Any input would be much appreciated.</p><p class=3DMsoNo=
rmal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks,</=
p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto'>Simon</p></div><p class=3DMsoNormal><o:p> </o:p></p></blockqu=
ote></div></blockquote></div><p class=3DMsoNormal><o:p> </o:p></p></di=
v></body></html>=
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