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Thread: Muffler water drain holes

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    Legendary dom14's Avatar
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    Muffler water drain holes

    Hi Guys,

    I'm beginning to think that I might have created a problem, rather than solving a problem,
    when I repaired my leaking muffler box couple of years ago with welding.

    Basically, the muffler was leaking and making that annoying noise.
    So, I went under it and as it shows in the picture, I spotted the problem areas.

    The only thing I didn't know back then was that there's a thing called "Muffler weep holes"
    So, there was a definite rust deterioration on the side wall as in the picture, which I welded and repaired,
    which I believe I did the right thing at the right time.

    Then at the bottom I noticed four holes as well. At least three of the holes appeared to be leaking exhaust gas,
    'cos I could see the soot around the holes. So, I thought I should repair them as well.
    Even though they appear to be holes, I couldn't actually see a hole into the inside of the muffler.
    It was more like rusted little circle, even after wire brushing it.
    Any way, I filled it with mig weld and cleaned and sprayed some heat resistant paint to make it look good.
    It's been going ok for almost two years, until few months back I just had to touch up the bottom ones again.

    Now, I got to know about the "weep holes" to drain the exhaust moisture that get trapped in the muffler, I began
    to think that I must have blocked the weep holes.

    Muffler is still going fine as far as I can see. I've attached a video as well of the exhaust, showing little bit of water dripping
    form the end of it, while the engine was running(this morning). The water was still dripping after 5-10 minutes of engine running,
    though today was a very very cold morning(zero degrees)

    https://www.youtube.com/watch?v=1h66gPBF_Hg

    Now, I'm bit worried whether I've blocked the "weep holes" and created a problem by causing the muffler to gather water and
    cause corrosion, blockage and eventual blow up.

    What should I do?!

    Should I drill a small hole in one of the blocked hole spots to allow the water weeping thing to happen again?

    Any advice would be great.

    Thanx
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    Last edited by dom14; 20th July 2015 at 12:24 PM.
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