[Healeys] Arghhhhh ...

[Alan Seigrist]

Bob -

I don't think the nuts are supposed to be torqued all that tight, no
more than 30 ft-lbs.  Really just enough to compress lightly and get a
good seal.  Could this be your problem?

Alan

On 3/28/10, Bob Spidell <bspidell at comcast.net> wrote:
> I'm at my wits--what's left of them--end.  I've replaced at least a
> half-dozen exhaust flange gaskets in the last couple years (the ones
> that go between the exhaust manifold and downpipes).  I've flat-filed
> the downpipes flanges, and the manifold flanges are smooth and flat.
> I've used the 'std' brass nuts and regular 5/16" with split washers and
> anti-seize--which seem to work the best--but I keep blowing out the
> gaskets.   I've been religious about keeping the nuts torqued up.
>
> The contemporary gaskets seem to be an unknown fibrous material
> sandwiched between two thin, perforated pieces of a thin, metal-like
> material--have also tried the ones made of copper donated by a generous
> Lister--but no matter what I do the gaskets blow out.  The filler
> material--whatever it is--seems to turn to a white powder which, of
> course, is not a good sealer.  The latest replacements I got from
> Moss--the metal is kinda yellowish--look like they might be of a
> different construction/composition, but I'm leery at this point.  I even
> tried to get a custom copper gasket shop to make a set for me, but they
> flaked out.
>
> Anyone have a source for gaskets that don't decompose and blow out?
> Man, I'd give anything for a NOS set of asbestos-filled gaskets, OSHA
> be damned.
>
> Or, will any of the goops work at the high temperatures?
>
> TIA
> Bob
>
> --
> *******************************************************************
> Bob Spidell           San Jose, CA            bspidell at comcast.net
>
> *******************************************************************
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-- 
Sent from my mobile device

Alan

'52 A90
'53 BN1
'59 Jag Mk IX
'64 BJ8