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Old 04-18-2011, 03:16 PM   #1 (permalink)
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Leaky Exhaust

my exhaust system leaks, but i'm not talking about leaking exhaust, it's leaking a liquid. i stopped by the bank a few days ago, and when i came back out there was a puddle under the Jeep, but not behind the right front tire like i'm used to (the AC condensation runoff). it was under the muffler and looked like water, i dabbed my finger in it and smelled it, and it smelled like water. now, me being the gearhead i am, i then tasted it (just residue from my finger) and it tasted like water with a hint of exhaust mixed in. anybody else noticed with their vehicles??

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Old 04-18-2011, 03:36 PM   #2 (permalink)
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Happens alot, Joe. Its just condensation inside the exhaust system. Happens more if you make alot of short trips and don't let the engine stay at op tempfor 20-30 min.
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Old 04-18-2011, 03:51 PM   #3 (permalink)
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Water vapor is a byproduct of combustion, and when your exhaust system isn't warmed-up it will condense the water vapor. So if you see a car dripping water out of the tailpipe, you know it's not warmed-up yet.
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Old 04-18-2011, 03:59 PM   #4 (permalink)
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i had seen it out of the tail pipe before, but never leaking from around the muffler, wasn't sure if it was the same thing. i guess since it leaks from there it's time for a new exhaust/muffler
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Old 04-18-2011, 04:15 PM   #5 (permalink)
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Some (all?) mufflers have drain holes in the bottom, or else they'd have water sitting in them almost all the time. Then they'd rot out.
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Old 04-18-2011, 04:17 PM   #6 (permalink)
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Some, yes. Not all. Usually OE. Aftermarket and OE replacements usually don't have it.
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Old 04-19-2011, 02:51 PM   #7 (permalink)
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makes sense, i had just never noticed it before.
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Old 04-19-2011, 03:36 PM   #8 (permalink)
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Hypermiling, you're reducing the volume and velocity of the flow thru the exhaust.
You're probably coasting as well - even less flow and less heat input.
Result : the exhaust system will be cooler and you get more condensation.

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