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Old 02-12-2009, 04:40 PM   #1 (permalink)
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Question Muffler contains water - problem?

So my central exhaust pipe rusted away from the front flange that joins with the back of the cat. converter. It was loud.

I finally broke the old flange's rusty grip on the cat, but I was having trouble getting the other end of the pipe off of the muffler flange, so I took the muffler off its hangers to get a better grip on the bolts than I could under the car.

After I got them separated, I noticed that the muffler was full of water (probably from snow the front of the loose pipe scooped off the ground, and just water in general flying in there).

I managed to get as much out as I could, shaking it and leaving it propped up on one end for a while. There was still quite a bit (maybe about a liter?) in there when I reattached it to the car, thinking it would get hot enough to eventually evaporate all of it.

Is my assumption erroneous? Does anyone know of more consequences to a waterlogged muffler?

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Old 02-12-2009, 06:19 PM   #2 (permalink)
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You should take a 1/8 inch drill bit abd drill a drain hole on both of the ends, at the bottom edge. This will allow the water to drain, so it doesn't stay soggy and rust out.
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Old 02-12-2009, 07:46 PM   #3 (permalink)
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No problem. It will evap out of there through normal driving. Most mufflers have weep holes to allow water to get out. ICE's tend to produce water vapor in "large" amounts until they get up to operating temperature anyways. More noticeable on cold mornings than warm days.
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Old 02-13-2009, 01:59 AM   #4 (permalink)
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in normal driving a gas engine will pass nearly as much water thru the engine as it does gasoline, only the water is in the form of water vapor, some of it will condense and drip out the muffler but if you keep this in mind it will give you an idea of how much water could be in there if you had a way to collect it.
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Old 02-13-2009, 09:08 AM   #5 (permalink)
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Thumbs up

aye, thanks for the comforting words folks. I know water normally ends up in there so I wasn't too shaken...there was just a LOT more than normal in there.

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exhaust, muffler, water, water in, water in muffler

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