[Healeys] 6cyl Exhaust manifold to pipe gasket Q

[Bob Spidell]

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
>
> *From: *healeyguy--- via Healeys <mailto:healeys at autox.team.net>
> *Sent: *Friday, March 4, 2022 7:08 AM
> *To: *healey.nut at gmail.com
> *Cc: *healeys at 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 at autox.team.net>
> To: Healey list <Healeys at 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20220304/ce7f1c01/attachment.htm>