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Old 10-11-2014, 12:19 PM   #1
karlbenz
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exhaust leak

I have a 2000 c3500 with the 7.4l. The exhaust was leaking out the gasket where the pipes and cats bolt up underneath. I changed the gasket but the flange is warped and is still leaking in several places. Any suggestions?
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Old 10-11-2014, 09:20 PM   #2
karlbenz
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Re: exhaust leak

never mind
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Old 04-13-2015, 12:41 PM   #3
karlbenz
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Re: exhaust leak

it's blown out again. Any fixes for this besides total replacement?
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Old 04-13-2015, 10:28 PM   #4
Boog
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Re: exhaust leak

The auto parts stores used to sell a tube of exhaust pipe joint sealer. You might look for that.
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Old 04-14-2015, 10:18 PM   #5
clinebarger
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Re: exhaust leak

Very common on GMT400 trucks, More so on big blocks. Have the flange cut out & pipes welded in place.
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