My car has a 4 2 1 manifold to a de cat to standard centre section to a basic loudish muffler.. I've replaced all the gaskets, checked all the seals and inspected everything howeverits still blowing and it sounds like the de cat is rattling a bit... strange any ideas what it is?
exhuast blow
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#1
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Super Moderator
Joined: Nov 2009
Cambridge(ish), UK.
Posts: 10581
BMW 5x M50d.
#2Where's it blowing from? That'll tell you what needs to be done to fix it...Quote:Originally Posted by saxokid94
My car has a 4 2 1 manifold to a de cat to standard centre section to a basic loudish muffler.. I've replaced all the gaskets, checked all the seals and inspected everything howeverits still blowing and it sounds like the de cat is rattling a bit... strange any ideas what it is?1 user thanked this post: -
#3It sounds like its coming from the front end manifold to decay joint but I've redone it three times and there's no leaks at all..
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#4I mean decat
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Super Moderator
Joined: Nov 2009
Cambridge(ish), UK.
Posts: 10581
BMW 5x M50d.
#5climb under it whilst it's running and you should feel/see (use a torch - it helps see the exhaust gas) where it's blowing from - if it is
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Saxperience Forum Bum
Joined: Apr 2013
Jarrow
Posts: 4022
2003 Icelandic Grey 16v VTR
1991 Daihatsu GTti
#6Hold a bit of bog roll around the gaskets, if it's blowing the tissue will flap about. -
Established Member
Joined: Jan 2013
Portsmouth
Posts: 1335
1997 Mk1 VTS
#7Generally de-catting makes it sound a bit blowy on low revs, i've found that anyway.1 user thanked this post: -
Saxperience Hardcore!
Joined: Dec 2007
smurfland.
Posts: 17346
Ex saxo owner.
#8Hold a rag over the exhaust tailpipe with the engine running,any gasses will be forced out of cracks/splits etc.