Installed new exhaust system on T yesterday. Warmed it up and resnugged the pack nut. Sounds like a T.
This is what I replaced, thanks dad !!


Looks nice.

So after getting it all done, ran a few erands today then off to the car wash. Cleaned the engine too. Dried everything off, but ignitition wasn't dry enough I guess.
KABLOOOEY !!!!!!!Backfired, Sounded like a 38special+P thru a 2inch snubbie. All the Latinos at the wash dove for cover.
Guess I need to get a new,new muffler.

So much for spot welds. This is what I was replacing.

If the outer skin will not fit, make one that will, some 0.70mm steel, a good piece of round hollow steel, some patience, roll your new skin and drill 6 small holes in the outer wrap, fold over the inner skin tack ( mig is better- arc will work too )the holes, now both outer and inner ( outer skin ) are now one finished large tube ready for fastening down.

good luck....watch the sharp edges.

David.

Or do like I did when my muffler went "BOOM", re-roll the outer shell and tack weld along the seam. The last time it went boom it only blew the back cap off.

When I get a new muffler I braze all the seams as I have had this problem before. Since the seams are brazed I have not had any more come apart even with the hardest back fire.

Steven.

I did the same thing to my new muffler. Just take it off and roll the metal back in place and weld or braze it along the seam and it will hold up. If not, mine is not that loud with the twisted cover after it blew up a few more times. I even had to go back and pick up parts off the road one time!

Bob

interestingly these original or original style 3 tube mufflers are pretty quiet, compared to a modern new muffler ???? never could work out why.

David.

Now if someone would just make them correctly!!

Fellows, I removed a stainless steel splashback from our kitchen to fit a new gas range. The local sheetmetal shop made as many inner and outer shells as he could cut out of the material. They have the correct folded joins and being stainless they are much tougher to blow apart. All I have managed to do is loosen the extension I have on my tailpipe.

Hope this helps.

Allan from down under.

That is why I usually make my own, out of scrap galvanized 20 gauge or similar. I usually use something I have on hand. Weld or braze, whatever is handy. Been a long time since I blew one out.

OT Year and years ago, I had a '65 Ch##y pickup with the then optional anti-smog set on it. It was a one year only setup with a "gulp valve" that when the engine got a few years old fouled up from oil fumes. It would then fail to gulp a minor misfire, dump some unburned gasoline into the after-burn exhaust injector exhaust manifold which would instantly ignite it and Kaboom! Even though the truck was before the smog kit was required, it was illegal to remove once it was there (Califunny was fun!). However, since the statute of limitations has long since run out and it is about thirty years since I sold the truck, I will admit to it. Although I do try hard to be an honest, law abiding, citizen. After the third time I had to weld the muffler back together from being blown wide open, I removed the after-burning system.
Drive carefully, and enjoy, W2