Why are the mufflers breaking?

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cowznofsky - 18 Jul 2007 18:03 GMT

I have a 1984 318i, and the muffler tore a hole right at the exhaust
pipe. I ordered one online (a cheap one) and brought it to my
mechanic. He said that my old one (which was oval shaped) was
something that had been thrown together, and that the new one, which
was much heavier metal, was the correct one. He bought the hangers
and put it on.

A few weeks later I have a hole in the new one, same place as the
old. I can't understand why this would happen, especially since it
seems like pretty rugged material, and it seems very straight forward
to put this on.

Any ideas why this might have happened?

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steve-caner@clara.co.uk - 18 Jul 2007 18:29 GMT

>I have a 1984 318i, and the muffler tore a hole right at the exhaust
>pipe. I ordered one online (a cheap one) and brought it to my
[quoted text clipped - 9 lines]
>
>Any ideas why this might have happened?

Sounds as if something is out of alignment or the mountings are in the wrong
place or the engine mounts are crap.

I would look at the engine and gearbox mountings first then go for the alignment
and then the exhaust hangers.

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