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Generation III External Engine
LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories

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Old 11-03-2009, 05:58 PM   #1
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Default What does a leaky header/bad gasket sound like

Does anyone one have a video of a leaky header/bad gasket? I got this flutter sound at wot. Kind of like an exhaust leak. It only does it at wot above 40 mph. I checked for leaks. I had the headers welded to the y pipe.
So I think it could be a bad gasket. Any tips or help would be great!
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Old 11-04-2009, 09:13 AM   #2
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How did you check for leaks/where?
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Old 11-04-2009, 09:35 AM   #3
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usually a ticking sound from my experience.
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Old 11-04-2009, 09:43 AM   #4
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Ticking sound as you accelerate
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Old 11-04-2009, 04:52 PM   #5
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Well it's not a ticking sound. More like a sputter or flutter sound.
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Old 11-05-2009, 03:03 AM   #6
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Quote:
Originally Posted by onyx_rock View Post
usually a ticking sound from my experience.
That was how my leaky exhaust manifold gasket sounded. Did you check as thuroughly as possible around the gasket to see if you could spot any heavier black spots where exhaust could be escaping? Other than that, check around the collector and such. Other than that, I'd guess just wait till it gets more pronounced or have someone that's been around cars a while jump in and take a listen.
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Old 11-05-2009, 05:55 AM   #7
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What kind of header gasket material?
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Old 11-05-2009, 05:34 PM   #8
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I bought the oem metal ones from ws6store.
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Old 11-05-2009, 05:51 PM   #9
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Odds are they are not your problem, pretty rare they ever leak, if the bolts are tight, look elsewhere.
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Old 11-06-2009, 08:58 AM   #10
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snug the bolts, but be careful if you reused the factory bolts. I broke the #1 bolt off in the head while re-checking to make sure they were all snug. You will notice black soot on the head just above the header primary and flange if you have a leak. The ticking noise will usually be pretty apparent as well. What you most likely have is a small leak where the collector meets the y-pipe. This is pretty common if your headers and y-pipe have slip joints for the collector/y-pipe hookup.
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Old 11-18-2009, 12:43 PM   #11
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It was my ported tb I had. I bought a different ported tb from a member on here and it fixed the car! No more sound. The car runs much better at idle. Pulls a bit more also.
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Old 11-18-2009, 12:43 PM
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