Date:         Fri, 17 Sep 1999 11:04:55 PDT
Reply-To:     vwvanman@EXCITE.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         vwvanman@EXCITE.COM
Subject:      Re: Mark Stephens six-stud system
Comments: To: Stuart MacMillan <stuart@cobaltgroup.com>
Comments: cc: vanagon@vanagon.com
Content-Type: text/plain

Stuart,
I would use the stock studs.  If the studs do not grow with the engine as it
heats, to maintain correct torque over the heat range, the studs might
eventually pull out of the case over time.  This was a problem for early T1
engines when VW switched to 10 mm studs, this was done to give more thread
holding power, but the studs pulled out of the block or broke after time due
to improper expansion rates.  VW then switched to 10 mm threads with a taper
to 8 mm in the center.

The stronger studs with a different metal composition than the stock studs
might prove to be detrimental over time.


Robert



> I am going to start accumulating parts in preparation for  building a
> strong 2.1 from the core now sitting in my garage.  One question,
> several of the studs are corroded.  Any thoughts on the $200 performance
> set Fast German sells?  Or should I just buy stock from the dealer?  I
> may have to have a machine shop do the work, since my first attempt to
> remove them revealed they were really stuck from corrosion.
>
> Thanks!
> --






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