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exhaust manifold noise? ? ?
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Old 25 Feb 2009, 11:06 PM   #1 (permalink)
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Arrow exhaust manifold noise? ? ?

hello all! !
i fitted an stainless equal length exhaust manifold over the weekend to my 94 classic, it fittted perfect with no problems at all, used new gaskets with exhaust paste, fitted all tight with no leaks, BUT... as i drive the car its fine but when i gun it i can here like a ticking noise matching the revs, (as though its leaking but its NOT) ive had a stethiscope on it and its as if i can here the exhaust fumes exiting into the manifold, i cant here it on the standard manifold as its very think cast and would hide this noise
has anyone else got this noise with a stainles manifold?
regards dave

Last edited by stressed dave; 25 Feb 2009 at 11:13 PM.
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Old 27 Feb 2009, 12:16 AM   #2 (permalink)
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Re: exhaust manifold noise? ? ?

Sure they no leaks no get a piece of say A4 paper and put it against the gaskets you changed and go round them all if the paper flutters or moves its blowing a bit and you have a leak you might see water too dripping from gasket if they a leak hope it helps
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Old 02 Mar 2009, 09:43 PM   #3 (permalink)
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Re: exhaust manifold noise? ? ?

Used to get it on a supersprint stainless 4 branch manifold on a 106gti however im a bit suprised you`d get it on a scooby,know exactly the sound you`re on about though an it aint like the exhausts blowing at all externally, almost like the exhaust gases are hitting your pipe/s in one place at high pressure causing the ticking resembling a blow but on the inside.

(Pmsl its ok your not going mad)
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Old 02 Mar 2009, 09:46 PM   #4 (permalink)
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Re: exhaust manifold noise? ? ?

i have the same problem. ive replaced the whole system basically. wanted to anyway to get rid of the cats. got new gaskets because ive felt water coming from the gasket between the turbo and exhaust. only place i need to replace is headers but not at the moment so hope gasket replacements does the job
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Old 03 Mar 2009, 08:11 PM   #5 (permalink)
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Re: exhaust manifold noise? ? ?

typical result when fitting stainless headers.....if it worries you that much,muffle them with the heat wrap,will quieten them down also will quieten down when they start to coke up..
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Old 07 Mar 2009, 02:55 PM   #6 (permalink)
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Re: exhaust manifold noise? ? ?

update

i removed the manifold, inspected all the gaskets , seals, welds and even preasure tested it, and its not leaking, so yes it is the exhaust fumes exiting into the pipes,
anyway, so i fitted my standard manifold back on, but kept the bigger bore stainless up pipe.
and, WOW! its mega, sounds slightly different to your standard setup (ie. deeper burble ) but it really growls, and pulls better than it ever did!
thanks for all your help guys!
regards dave
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Old 07 Mar 2009, 05:14 PM   #7 (permalink)
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Re: exhaust manifold noise? ? ?

Glad you sorted it
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