Exhaust blockage?

vag2109 · 15-02-14, 11:19 AM

Hi,
has anyone ever experienced a blocked exhaust? As i mentioned in my other post my b2 Sport feels restricted for some reason. Following good advice from members i have changed the plugs,fuel filter is next on the list,but a friend of mine has a theory that my exhaust may be blocked due to internal corrosion. I have had my car for 9 years,out of that it has spent around 5 years parked up in a non heated garage,so the exhaust system is at least 9 years old,probably more like 10 or 11.
I was wondering whether anyone else has experienced such a problem?

Thanks

John. · 15-02-14, 11:34 AM

Aye on a B3 Coupe with NG engine, cat was blocked so engine wouldn't rev over 5k rpm.

Isimmo · 15-02-14, 11:36 AM

Quote:

Originally Posted by vag2109

Hi,
has anyone ever experienced a blocked exhaust? As i mentioned in my other post my b2 Sport feels restricted for some reason. Following good advice from members i have changed the plugs,fuel filter is next on the list,but a friend of mine has a theory that my exhaust may be blocked due to internal corrosion. I have had my car for 9 years,out of that it has spent around 5 years parked up in a non heated garage,so the exhaust system is at least 9 years old,probably more like 10 or 11.
I was wondering whether anyone else has experienced such a problem?

Thanks

Probably got a rats nest in it.... I kid you not.

vag2109 · 15-02-14, 11:39 AM

Hi John,
thanks for the reply,my b2 doesn`t have a cat. But if your cat was blocked then i guess my exhaust could be as well.

vag2109 · 15-02-14, 11:45 AM

Thanks Isimmo,
i`ve been driving it for nearly 6 months now,i think that rats must be long gone.I suppose their nest could still be there. How far up the system could they go,starting from the backbox? I know gases travel all the way from manifold,but there baffles in both the boxes. Is it logical to assume that if there is a blockage it would be in the backbox?

John. · 15-02-14, 12:09 PM

Quote:

Originally Posted by vag2109

Is it logical to assume that if there is a blockage it would be in the backbox?

I would think any of the silencers could develop a restriction?
It was a pals coupe that had the cat issue, we checked cam and ign timing first before dropping the exhaust after the front-pipe..............does your's rev out ok?

vag2109 · 15-02-14, 12:34 PM

John, yes it revs alright. Just seems really laboured. Would there be any advantage/disadvantage to bypassing the middle box,ie having a straight through pipe made up,directly from the front pipe to the backbox?

John. · 15-02-14, 01:24 PM

Would I be right in saying this is just a 2 box system and you could take off the first silencer and due to it's shape just look through it to see if it's clear or not-if it's the same as mk1 Golf it's just an expansion chamber I think.
I'm not familiar with B2 exhaust.

vag2109 · 15-02-14, 03:08 PM

Not sure John, though i think you`re right.The weather is not helping at the moment,i it`ll have to wait until next week . I guess best to remove the whole damn thing and examine it

15-02-14, 11:34 AM	#2
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,543	Aye on a B3 Coupe with NG engine, cat was blocked so engine wouldn't rev over 5k rpm.

15-02-14, 11:39 AM	#4
vag2109 Grown up member Join Date: Feb 2012 Posts: 369	Hi John, thanks for the reply,my b2 doesn`t have a cat. But if your cat was blocked then i guess my exhaust could be as well.

15-02-14, 11:45 AM	#5
vag2109 Grown up member Join Date: Feb 2012 Posts: 369	Thanks Isimmo, i`ve been driving it for nearly 6 months now,i think that rats must be long gone.I suppose their nest could still be there. How far up the system could they go,starting from the backbox? I know gases travel all the way from manifold,but there baffles in both the boxes. Is it logical to assume that if there is a blockage it would be in the backbox?

15-02-14, 12:34 PM	#7
vag2109 Grown up member Join Date: Feb 2012 Posts: 369	John, yes it revs alright. Just seems really laboured. Would there be any advantage/disadvantage to bypassing the middle box,ie having a straight through pipe made up,directly from the front pipe to the backbox?

15-02-14, 01:24 PM	#8
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,543	Would I be right in saying this is just a 2 box system and you could take off the first silencer and due to it's shape just look through it to see if it's clear or not-if it's the same as mk1 Golf it's just an expansion chamber I think. I'm not familiar with B2 exhaust.

15-02-14, 03:08 PM	#9
vag2109 Grown up member Join Date: Feb 2012 Posts: 369	Not sure John, though i think you`re right.The weather is not helping at the moment,i it`ll have to wait until next week . I guess best to remove the whole damn thing and examine it