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Thread: Hole in Muffler

  1. 22nd October 2012, 09:48 AM #1
    OlliesLRover
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    Hole in Muffler

    Disco 94 V8i Auto

    Noticed a hole in the middle muffler a week ago, looks like it had been cut with a sharp knife (sharp rock) about 2" long 1/4" wide.

    Muffler in very good condition no rust or dents.

    I got some Permatex muffler putty and followed the instructions to the letter - cleaned area - pushed putty into the hole - let engine run for 10min - left to harden over night ect ect.

    2 days later putty had started to bubble and crack, 3rd day gave putty a tap and it started falling out.

    Any advice on something that will work.

    Regards
    Rich
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  2. 22nd October 2012, 10:16 AM #2
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    Scouse
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    If you really want to keep the muffler, then have a patch welded over the hole.
    Scott
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  3. 22nd October 2012, 10:18 AM #3
    redrovertdi Guest
    or rivet a bit of can over the hole with some putty inbetween, best bet is to replace the muffler with a straight pipe.
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  4. 22nd October 2012, 12:17 PM #4
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    SouthOz
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    Steel patch riveted on with some RTV silicone under it will get you out of trouble.

    Dave
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  5. 22nd October 2012, 12:23 PM #5
    OlliesLRover
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    Quote Originally Posted by Scouse View Post
    If you really want to keep the muffler, then have a patch welded over the hole.
    Interesting, I was under the impression (muffler guy) you couldn't weld mufflers??
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  6. 22nd October 2012, 12:28 PM #6
    OlliesLRover
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    Quote Originally Posted by redrovertdi View Post
    or rivet a bit of can over the hole with some putty inbetween, best bet is to replace the muffler with a straight pipe.
    How loud will it be, as I'm well on the wrong side of the loud noise barrier
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  7. 22nd October 2012, 12:57 PM #7
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    Scouse
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    Quote Originally Posted by OlliesLRover View Post
    Interesting, I was under the impression (muffler guy) you couldn't weld mufflers??
    Sure, they're made of thin metal but anything steel is weldable.
    The standard muffler wasn't stainless or anything fancy so welding it is easy enough - the rust holes at the end of mine get welded up every couple of years or so.
    Scott
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  8. 22nd October 2012, 02:36 PM #8
    redrovertdi Guest
    not much louder at all and your turbo can expell gasses faster with less restriction, you still need a back muffler to be legal in QLD
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  9. 22nd October 2012, 03:06 PM #9
    OlliesLRover
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    Thanks, at least I now have a couple of viable options.

    Regards
    Rich
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  10. 22nd October 2012, 03:07 PM #10
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    seano87
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    Quote Originally Posted by redrovertdi View Post
    not much louder at all and your turbo can expell gasses faster with less restriction, you still need a back muffler to be legal in QLD
    Its a V8 according to the original post - no turbo.

    Not sure how much louder the v8 is without middle muffler? Probably bigger change in noise though with the v8 compared to turbo as the turbo suppresses a fair amount of noise in the first place.

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