Date: Tue, 1 May 2007 00:04:13 +0100 From: "reg" <regnospamespam.com> Subject: Re: Bosal Exhaust ... rear silencer, intentional pin hole or not?
"Charles C." <c.k.christacopoulos.removeme.nospamee.ac.uk> wrote in message news:46366fdc$0$19261$da0feed9nospam.zen.co.uk... > 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&model=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. > its intentional, because cat fitted vehicles produce a lot of water, unless they have a "drain" hole the water will sit in the lowest part of it & rot it from the inside out, if you find it does make a blowing sound just screw a self tapper into it & it isnt an MOT failure.
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