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It's been years since I've worked/struggled with getting an effective
and durable seal at this joint--on one road trip I would reach under my
BJ8 with a couple socket extensions every morning and tighten the nuts
before startup--but based on 'science' alone I reasoned the silver metal
(aluminum, steel?, ???) side should go against the manifold. My
reasoning was that copper is an excellent heat conductor so the thin,
perforated side with the insulator under it should go to the hot side. I
remember the older, NOS gaskets with copper on both sides appeared to
have asbestos as the insulator which, of course, works best but has been
persona-non-grata for decades. Also, the brass nuts never worked well
for me, but they seem to be OK on the manifold side.
On 3/4/2022 8:10 AM, Harold Manifold via Healeys wrote:
>
> I just happened to have the 3 bolt exhaust pipe gaskets on my desk.
> Mine are Payen and copper on both sides. I would suggest based on this
> there is no wrong side for the copper.
>
> Harold
>
> *Sent: *Friday, March 4, 2022 7:08 AM
> *To: *healey.nut@gmail.com
> *Cc: *healeys@autox.team.net
> *Subject: *Re: [Healeys] 6cyl Exhaust manifold to pipe gasket Q
>
> Alan
>
> I don't have a definitive answer but checked my gaskets in the shop
> and they are copper on both sides (not solid copper). Did read online
> that if the gasket is smooth (metal) on one side and composite on the
> other that the composite side goes down (towards the tailpipe).
>
> Perry
>
> -----Original Message-----
> From: Alan Seigrist via Healeys <healeys@autox.team.net>
> To: Healey list <Healeys@autox.team.net>
> Sent: Fri, Mar 4, 2022 2:51 am
> Subject: [Healeys] 6cyl Exhaust manifold to pipe gasket Q
>
> Seems like a dumb question, is there a conventional wisdom of whether
> the copper side or the steel side should face up?
>
> Best Regards,
>
> Alan
>
>
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It's been years since I've worked/struggled with getting an
effective and durable seal at this joint--on one road trip I would
reach under my BJ8 with a couple socket extensions every morning and
tighten the nuts before startup--but based on 'science' alone I
reasoned the silver metal (aluminum, steel?, ???) side should go
against the manifold. My reasoning was that copper is an excellent
heat conductor so the thin, perforated side with the insulator under
it should go to the hot side. I remember the older, NOS gaskets with
copper on both sides appeared to have asbestos as the insulator
which, of course, works best but has been persona-non-grata for
decades. Also, the brass nuts never worked well for me, but they
seem to be OK on the manifold side.<br>
<br>
<div class="moz-cite-prefix">On 3/4/2022 8:10 AM, Harold Manifold
via Healeys wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5B9CEE7B-99F1-4C03-8FDC-325995861237@hxcore.ol">
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<p class="MsoNormal">I just happened to have the 3 bolt exhaust
pipe gaskets on my desk. Mine are Payen and copper on both
sides. I would suggest based on this there is no wrong side
for the copper.</p>
<p class="MsoNormal"><o:p>Â </o:p></p>
<p class="MsoNormal">Harold<o:p></o:p></p>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div
style="mso-element:para-border-div;border:none;border-top:solid
#E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="border:none;padding:0in"><b>From:
</b><a href="mailto:healeys@autox.team.net";
moz-do-not-send="true">healeyguy--- via Healeys</a><br>
<b>Sent: </b>Friday, March 4, 2022 7:08 AM<br>
<b>To: </b><a href="mailto:healey.nut@gmail.com";
moz-do-not-send="true"
class="moz-txt-link-freetext">healey.nut@gmail.com</a><br>
<b>Cc: </b><a href="mailto:healeys@autox.team.net";
moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a><br>
<b>Subject: </b>Re: [Healeys] 6cyl Exhaust manifold to pipe
gasket Q</p>
</div>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Alan
<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I
don't have a definitive answer but checked my gaskets in
the shop and they are copper on both sides (not solid
copper). Did read online that if the gasket is smooth
(metal) on one side and composite on the other that the
composite side goes down (towards the
tailpipe). <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Perry<br>
<br>
<o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">-----Original
Message-----<br>
From: Alan Seigrist via Healeys
<a class="moz-txt-link-rfc2396E"
href="mailto:healeys@autox.team.net";><healeys@autox.team.net></a><br>
To: Healey list <a class="moz-txt-link-rfc2396E"
href="mailto:Healeys@autox.team.net";><Healeys@autox.team.net></a><br>
Sent: Fri, Mar 4, 2022 2:51 am<br>
Subject: [Healeys] 6cyl Exhaust manifold to pipe
gasket Q<o:p></o:p></span></p>
<div id="yiv7050415631">
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Seems
like a dumb question, is there a conventional
wisdom of whether the copper side or the steel
side should face up? <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p>Â </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Best
Regards,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p>Â </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Alan<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
</div>
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