exhaust leak issue

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Apr 18, 2008 | 03:18 PM

Ironxcross

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exhaust leak issue

so one of my friends decided to be an asshat and sawzall my exhaust behind the collectors on both sides of the y-pipe. for a while i had bandclamps, and still heard a leak. got the cuts welded today.. and i STILL hear a leak. the weld is good... so is it leaking from somewhere else? the header bolts are tight.. im sort of at a loss here.

Apr 18, 2008 | 03:26 PM

the_merv

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Look around for soot..

Apr 18, 2008 | 03:26 PM

Bad_tx_Z28

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well...the only thing i could tell you is cold start the car and run your hand next to the pipe and see if you feel some leaks...

Apr 18, 2008 | 04:10 PM

Ironxcross

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Quote:

Originally Posted by Bad_tx_Z28

well...the only thing i could tell you is cold start the car and run your hand next to the pipe and see if you feel some leaks...

thats the problem, i dont feel ANYTHING. i hear a leak though.

Apr 18, 2008 | 04:13 PM

Purple95Z28

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I know someone who had a ticking exhaust leak she couldn't track down after weeks and it turned out to be the egr tube was leaking because it had gotten bent up during header install..

Apr 18, 2008 | 06:34 PM

Ironxcross

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i looked at everything again. everything is tight and good. my car just doesn't make any sense. thats all!

Apr 18, 2008 | 06:44 PM

the_merv

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Apr 18, 2008 | 09:57 PM

the_merv

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How loud is it and how consistant is it?

Apr 18, 2008 | 10:21 PM

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Ironxcross

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gets louder under load, sounds like an air escaping sound. checked the header gaskets again, still good. im going to tighten them more. maybe it'll help.

Apr 19, 2008 | 03:19 PM

#11

Ironxcross

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i checked the headers and drove it around. maybe it blew out of gasket. im so tired of screwing wtih this thing so it doesnt leak.

Apr 19, 2008 | 07:05 PM

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Bad_tx_Z28

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hmm...i have the same prob...i found out that my noise was valvetrain...for some reason the rockers on the right bank are extremley loud when warm...cant figure it out

Apr 19, 2008 | 08:38 PM

#13

formula1785

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i have the same problem with my stock manifolds..i hear the sound but cant seem to find the leak and its getting to me...most of the noise is the hydraulic
lifters....

Apr 19, 2008 | 09:31 PM

#14

Ironxcross

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are aftermarket rockers more noisy and causing this sound?

Apr 19, 2008 | 09:33 PM

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Revelation Z28

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roller rockers will make alot of ticking

Apr 19, 2008 | 09:35 PM

#16

Ironxcross

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would this ticking be worse under load?

Apr 19, 2008 | 09:37 PM

#17

Revelation Z28

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Quote:

Originally Posted by Ironxcross

would this ticking be worse under load?

i dont know about that, but ive heard an LT1 with 1.6 RRs on idle in person and it ticked like a bad header gasket.

Apr 19, 2008 | 09:39 PM

#18

Ironxcross

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Quote:

Originally Posted by Revelation Z28

i dont know about that, but ive heard an LT1 with 1.6 RRs on idle in person and it ticked like a bad header gasket.

damn it. this is such a weird sound and it doesnt make sense for it to be a bad header gasket.

Apr 19, 2008 | 09:56 PM

#19

Revelation Z28

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open the hood and have someone start the car in an enclosed space (closed garage) and keep your head above each header and see if you smell the raw catless smell of the exhaust before the tailpipes fill it. thatll be the easiest way of finding a header gasket leak.

Apr 19, 2008 | 10:03 PM

#20

StealthFormula

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I have the same problem and its freaken annoying. I checked everything and no idea, it sounds so much like a little exhaust leak under load but I cant trace it. I'm pulling the LT's out for the heads so Im going to make certain that everything goes together perfect and then see what happens. My 1.6's are noisy at idle but I cant imagine they would sound like a leak under load.

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