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Odd nut

In message <199803082309.PAA14783@mh3.cts.com> Mike Posner writes:

> >Found a nut where no nut should be - in the turbo inlet.
> > 
> >It's M6, 12mm across flats, 9mm long.  5mm of the length has flats, 4mm has 
> >been turned down to a cylinder 11.5mm in diameter.  A small lump has been
> taken 
> >out of the cylindrical portion.

> Whats holding on the impeller? 

My first thought, too.  This was how my turbo failed at 94000 miles.  Haven't 
stripped it far enough to get a good view of the impellor yet.

 Phil Payne
 UK Audi [ur-]quattro Owners Club