VW does not sell the studs for the alternator bracket and I doubt the auto
parts store got you anything but the exhaust grade stud which is probably a
property class (P.C) 5.8. Even at McMaster Carr the best studs available are
only P.C. 8.8. Just as or more important than the studs are the strength of
the nuts, and if used the washers. They need to be matched and yes washer do
come in grades. And do not use lock washers here. If the washer distorts the
connection will come loose.

Common causes for the studs to loosen and break to begin with include belt
tension, alternator vibration, (bad bearings or rotor), loose lower pivot
bolt. Yes, that bottom pivot bolt has to be tight. If you can adjust the
belt without first loosening this bolt it is too loose. Many rebuilt
alternators have poorly balance rotors causing all sorts of extra vibration.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Josie Lamb Williams
Sent: Sunday, September 27, 2009 11:55 AM
To: vanagon@GERRY.VANAGON.COM
Subject: 84 Westy alternator mount studs breaking

New to list, 1st post.  My 84 Westy with original 1900 engine keeps breaking
it's alternator mounting bracket studs.  3 times now.  Last time, while
traveling, I had factory VW studs installed by very reputable shop and
mechanic Harold at Gene's Foreign Car Service and Parts Broomall,
Pennsylvania. I trust he did it right yet, they are now broken again??  I
have run many miles now with alternator held by adjustment arm only and very
rattley.  Getting ready to put new studs on again (today hopefully) myself.
I have purchaced some 8mm studs from auto parts store that are rated to be
very strong (sorry dont remember specs) ANY SUGGESTIONS for how to avoid
this reoccuring problem??

THANKS!

Mark Williams
Lexington, KY

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