Fixing split mufflers on the cheap

Discussion in 'Technical' started by _Robbo_, May 11, 2013.

  1. _Robbo_

    _Robbo_ Active Member

    First off this is my guide on how to fix a muffler which has been torn, teared has a sizeable hole and so on. Now the ideal way to do this would to be to replace the muffler, but I'm dead broke, and well trying to fix it wasnt going to hurt.

    Here's what you doing to need:
    The broken muffler
    A welder (of your choice) I used an Oxy and my father :)
    A of sheet of steel cut to size
    Maybe some rust converter; like so
    [​IMG]
    Maybe some paint

    Step 1.
    Remove your muffler and get a rough estimate of the size of plating you will need
    This was my hole. (We had previously attempted to fix this hole, Thus there's putty around it)
    [​IMG]

    Step 2.
    Cut out the steel required
    [​IMG]

    Step 3.
    Mark the hole required to be cut.
    [​IMG]

    Step 4.
    Choppy Chop, Cut the muffler to allow for fitting of new steel.
    [​IMG]
    Remember to keep checking that your cut to size steel will fit.

    This was the underside of my piece. And why it sounded horrible..
    [​IMG]
    (thats the hole we previsously tried to fix)

    Step 5.
    Treat your cut steel with some rust converter And heat proof pain to withstand rust.
    [​IMG]

    Step 6.
    Find yourself someone who can weld and also the obvious, a welder..
    [​IMG]

    [​IMG]

    Step 7.
    Begin welding
    Helpful hint: Tack one of the corners first so you can move the steel around to suit the hole.
    [​IMG]
    [​IMG]
    Step 8.
    Weld some more
    [​IMG]
    [​IMG]

    After we finished welding with steel wire, Dad decided he would use a bronze stick, in order to fill any pin holes in the weld. This is because the bronze flows alot easier.
    [​IMG]
    [​IMG]
    Step 9.
    Clean up your welds

    Step 10.
    Make it pretty with some paint!

    So there you have it, This was what i spent half of the day doing, As it appears there's no leaks or vibrations in the muffler. Quite happy and didn't cost anything to fix it, as we had the stuff lying around.

    Cheers
    Robbo
     
  2. Sanouske

    Sanouske Retired Moderator

    Wow. That's keen. Good work and dedication.

    When I had to do emergency fixes I just got some tin, sheet steel, whatever is laying around. Roughly shaped it to the required fix. Got some high temp sealant, a few hose clamps, and put it all together. Good cheap fix.

    What you've done is a proper repair job, haha. Will last you for a long long time. Good in you.
     
  3. _Robbo_

    _Robbo_ Active Member

    Thanks,
    Hopefully it will last! aha, Zees quality is not as good as its made out to be!
     
  4. ABZ300

    ABZ300 G

    Good job Robbo

    If you wernt doing skids & hitting stuff, then zees quality is more than good :p nothing wrong with mine & its been almost a year lol

    Abraham
     
  5. tassuperkart

    tassuperkart Its a lie I tell you!

    Hahahaha olde-school dude doing old school repairs with old school blue tongued spanner!!! Its a dying art using the flame. Id not have inserted that patch. Its too time consuming. Just lay it over the cutout and braze it only. 1/4 the time spent!
    Love it tho. Fix and repair rather than just throw out!!!

    Im guessing the hole began in the bottom of the muffler. Its been running a long time since the first pinhole to crack out like that!
    This indicates a lot of water buildup collecting in the bottom of that "can". Lots of cold/slow/short running and not evaporating it out. Rust city.
    Pretty strong case for staino mufflers on predominantly town cars as a matter of course. You dont have the same problem with standing water in pipework so mild is fine for that. Just the muffler.

    E
     
  6. _Robbo_

    _Robbo_ Active Member

    As far as I was aware, there wasnt any pin hole, Got it put on, then a week later this happened;
    [​IMG]
    Which was patched up by welding this over the top.
    [​IMG]

    Lasted about a month, until the welds gave way.
    We inserted the patch, to avoid adding unnecessarily height to the muffler, im running line at being exactly 100mm and just under. Trying to avoid getting defected again.
     
  7. bRACKET

    bRACKET Do Right Dean

    Didn't know doing skids damaged your mufflers..?
     
  8. tassuperkart

    tassuperkart Its a lie I tell you!

    You HAVE to be shitting me....surely your shitting me!

    E
     
  9. bRACKET

    bRACKET Do Right Dean

    Nope, poor kid always cops a defect hahaha
     
  10. _Robbo_

    _Robbo_ Active Member

    Unfortuantly no im not. hahaha
     

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