The aviation industry has long used brass exhaust nuts because the have
more strength than copper, do not seize, and can stand the hight heat
associatied with the exhaust. ports. They are "one time use only" nuts
however.

The industry also has available special heat treated nuts for exhaust
applications but they are not nearly as successful as brass nuts for
ease of removal, and in spite of the fact they were designed as exhaust
nuts they still seize on the exhaust studs and cause all kinds of grief.

Trying to remove a seized nut often results in the stud being broken off .

Have you ever tried drilling  a broken exhaust stud out of an aircraft
cylinder head and installing a new one, with  the engine still in the
airplane???    It's a bitch! Big time PITA!!

Regards,

John Rodgers
88 GL Driver

Dennis Haynes wrote:

>Of all the things to protect hardware in a hot corrosive environment,
>copper! Think about it.
>
>Dennis
>
>-----Original Message-----
>From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
>Of Ken Lewis
>Sent: Sunday, February 13, 2005 12:36 PM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Stainless Steel Exhaust Fasteners
>
>Jere and Chris,
>
>Try these:  http://tinyurl.com/5nzo7
>or Google "copper exhaust nuts VW". Aircooled VW and Porsche folks swear
>by
>them (not at them).
>
>Ken Lewis
>http://neksiwel.20m.com/
>
>
>
>