grinding sound in rain - '91 200q - consensus

["Gaidos, A." <agaidos@got.net>]

 All, thanks for all the replies! The consensus seems to be a matter of the
exhaust pipe expanding and contracting near the cross-over. In turn this
causes the exhaust pipe or the cross over to rub against the prop shaft.
 I find that very interesting. After thinking about it, some kind of exhaust
rubbing came to mind but I hadn't considered the expansion and contraction
of the metal itself.
 This coming weekend I'll have a look at it.
Thanks again
Anton

Anton J. Gaidos, III

1991 200 quattro 20 valve Turbo
1990 90 quattro 20 valve
1985 quattro Turbo Coupe - Top 26 of the Century?