Hi,

Crossposting to alt.autos.saab and uk.rec.cars.maintenance.

The car is a SAAB 9000 (year 97, 2.0 LPT).  Today I had a mid and rear
section exhaust fitted by Kwick-Fit (Partco parts if it matters).

The 2nd (last) silencer has a pin hole at its rear plate.  By rear plate
I mean the end that connects to the mid section.  The pin hole appears
intentional (I could only feel it not see it) and is low down in the
middle of the back plate.

http://www.catalogue.bosal.com/pages/exh_system_list.php?query_nr=6&make=saab&mo
del=9000&body=Hatchback&cartype=2.0&fuel=B&year=1997
or
http://tinyurl.com/2t4fsu

Just imagine a pin hole around 1 mm in size on the left plate (as you
see it) of the final silencer.

I am told that Vauxhalls (what a coincidence) tend to have such a hole
and it is to help the rear silencer stay dry so it does not corrode
internally.  Does it sound true?

I can understand the issue of corrosion, but I don't see how that hole
will help in any way but ... it does not feel like a drain hole.

Any comments appreciated.

Regards
Charles

PS. For my SAAB friends.  When I looked around 2000 for a complete Bosal
exhaust, Bosal did not make the last section for post 1996 9000s.  I
guess by that time GM was sourcing SAAB exhausts elsewhere whereas
before Bosal had been the OEM for SAAB exhausts.