Listers
While the historical information regarding original material stated is correct,
gasket sets offered over the last 40 years have had a variety of materials.
Indeed I had several head gasket sets in the late 60's / early seventies that
had a cork replacement, usually dried and split before they could be used. In
the 90's there were O-rings included in the sets. Several years ago, a visit to
the local plumbing supply turned up a suitable replacement "gland". Not really
a normal O-ring but similar and worked (still is) very well.
Aloha
Perry
In a message dated 01/28/09 22:46:14 Hawaiian Standard Time,
ah@jharper.demon.co.uk writes:
Alan
Sorry but I have to disagree with you. The original material was
certainly not cork. I might be lead; if not something very similar. It
appears that something like string is encased in lead and then would
around to make a ring. It is then compressed to shape so that when
further compressed between the two internally tapered flanges it bites
hard onto the smooth balance pipe.
About 50 years ago it was possible to purchase similar material for
winding into water pump glands. An example being a Fordson Tractor of
that vintage.
If it was lead then regulation might make this part illegal to sell so
an alternative needs to be found but I would not have thought that cork
would have been up to it.
Regards
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