LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Best way to detect exhaust leak.

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Old 08-04-2004, 04:00 PM
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Best way to detect exhaust leak.

What is the best way to detect if you have an exhaust leak at the header flange?
I need to know why my o2 sensor is reading rich and it is driving me nuts!
Thanks.
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Old 08-04-2004, 04:13 PM
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Re: Best way to detect exhaust leak.

Usually you'll find soot around where the leak is. Another way I've done it is to start the car when it's cold and feel around for the leak in the suspected area before it gets too hot to the touch.
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Old 08-04-2004, 04:31 PM
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Re: Best way to detect exhaust leak.

usually you can hear the leak, it sounds kinda like...."bang"
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Old 08-04-2004, 09:40 PM
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Re: Best way to detect exhaust leak.

I heard that you can use a little piece of hose and move it around the manifold and have the other end to your ear.
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