Date:         Thu, 12 Aug 2004 06:20:24 -0400
Reply-To:     Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject:      exhaust nuts
Content-Type: TEXT/PLAIN; charset=US-ASCII

so a week or so ago i had the chance to take apart a 1.9 wasserboxer
exhaust with the factory exhaust system on it.  or i assume it was since
the van is from arizona.  anyhow the exhaust nuts mounting the headers to
the heads were unlike any that i have seen before.  they are 13mm nuts
with what look like wound spring steel inserts inside them.  similar to
what a helicoil looks like.  if these are factory nuts are they still
available at the dealer or would the dealer hand me some regular nuts with
a N part number?  additionally does anyone know why these nuts were made
like this?  i would guess something to do with the thermal expansion
differences between the aluminum head and the steel of the header and
stud.

jonathan