Exhaust/Header Leak?? - Mustang Evolution

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Old 10-16-2012, 07:49 AM   #1
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Exhaust/Header Leak??

So I believe its a leak but I just wanted a few opinions and ideas on how to fix it..

So I have a 95 5.0 with o/r xpipe, and the noise is coming from the passenger side in the very back.. sounds like its coming from the header but I don't see no cracks or anything.. but I can smell alot of exhaust fuems.. its like a loud fast tick or hissing sort of..

Last thing, If I'm right do you guys think I'm losing hp or tq?? And if so how much? Its gotten a bit worse recently and feels like I've lost a little bit of throttle response.. but other then that the car runs really strong =) lol..
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Old 10-16-2012, 08:16 AM   #2
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It does sound like a leak to me. The most important thing is not a loss of tq or hp, it's the possibility of sucking up a valve and ruining your heads! Get some copper or dead soft aluminum gaskets, and lock washers for your header bolts.

---------- Post added at 08:16 AM ---------- Previous post was at 08:13 AM ----------

Quote:
Originally Posted by 91notchback
It does sound like a leak to me. The most important thing is not a loss of tq or hp, it's the possibility of sucking up a valve and ruining your heads! Get some copper or dead soft aluminum gaskets, and lock washers for your header bolts.
Or it could be coming from your collectors. I use lock washers on them also.
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Old 10-16-2012, 09:14 AM   #3
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Put a tissue on the end of a screw driver and move it around in the suspected area and watch for it to blow around.
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Old 10-16-2012, 10:04 AM   #4
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Nice! I've never thought of that. I always end up trying to feel down there and burnin the hell out of my hand!lol...
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Old 10-16-2012, 12:23 PM   #5
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Quote:
Originally Posted by dreamstang View Post
Put a tissue on the end of a screw driver and move it around in the suspected area and watch for it to blow around.
+1
I have a dowel rod with a bit of white rag taped on it just for that purpose.
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Old 10-16-2012, 03:12 PM   #6
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You can also have contaminated exhaust gases from the exhaust leak which will throw off the o2 sensors resulting in less than perfect performance. Should take nothing more than an hour to replace gasket. The most critical part is to remove all the old gasket material. This can be time consuming but must be done right. I prefer just a regular one inch wide paint scraper.
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