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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again

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  #1  
Old 29th May 2016, 12:12 PM
Sir WIll Sir WIll is offline
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Default S8 Exhaust News

The exhaust in the old girl is all original and was ok if not a little tired round the edges.

After a blast full bore down a local dual carriageway I pulled off the slip road and my word there was a sudden change.

Gone was the normal exhaust note and replaced to what sounded like Thor gargling TCP from the middle of the car.

Had a look under the car and nothing blown, fallen off or split under there.

Not sure if a cat has gone or some baffles have failed but it now just sounds like I have a rather nice sports exhaust on there!

I may keep it that way for a while
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Old 29th May 2016, 12:16 PM
tintin tintin is offline
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Doesn't sound like a Cat's gone - that's not a pleasant sound. Enjoy the free upgrade
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Old 29th May 2016, 12:17 PM
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Turbo Tony Turbo Tony is offline
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LMAO@ "Thor gargling TCP"
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Old 29th May 2016, 12:32 PM
HPsauce HPsauce is offline
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One of my cats went and it didn't make much difference at all, just a rattling at times and a tiny bit of extra grumble.

Though by the time I replaced it there were no more rattles and all. The supplier got back (it was an exchange process as is I think usual) was an empty metal shell - all the catalyst/ceramic was long gone down the exhaust pipe!
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!) Oh, and a brand new engine at just under 30,000 miles on the factory one!
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Old 29th May 2016, 04:18 PM
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Goran Goran is offline
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If your cat has gone get it replaced soon. Mine broke apart and rattled badly, one large honeycomb piece was moving around and partially blocking exhaust flow. Having seen it I wished I replaced it much sooner, must have been like this for almost a year.
Car drives much better now, must have been choking at low rpm. Very noticeable with a clutch.
You don't want exhaust gasses struggling to escape, potentially backing up to the exhaust valves and building up heat.
Hopefully yours has blown straight through removing any obstruction.

Last edited by Goran; 29th May 2016 at 04:21 PM.
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  #6  
Old 6th June 2016, 09:19 PM
Sir WIll Sir WIll is offline
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Worked this one out now, looks like one section has started to pull out the other near the centre.

The sleeve and clamp that was holding it clearly is failing hence the sound.

Nothing blown or broken just two sections slipping apart.

Anyway, I will put all back in I just wanted to know does anyone know the pipe diameter of a standard FL S8 exhaust pipe so I can order a new clamp?

Thank you as always ladies and gents.
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Old 6th June 2016, 09:41 PM
MikkiJayne MikkiJayne is offline
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The front ones are 60mm - 893253139B. They are about £25-30 I think.

Personally I only ever use genuine exhaust couplers because Audi pipes are slightly off 'standard' sizes and so usually right between sizes of aftermarket pieces which then either don't quite fit or don't seal properly. The genuine couplers just work first time and are much better quality anyway
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