# What causes a muffler to EXPLODE?

**URL:** <https://forums.speedlife.net/t/what-causes-a-muffler-to-explode/39334>\
**Category:** NYSpeed Automotive\
**Created:** [November 27, 2007, 8:30am UTC](https://forums.speedlife.net/t/what-causes-a-muffler-to-explode/39334 "2007-11-27T08:30:21Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![Boomin99GT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/boomin99gt/32/7306_2.png) [@Boomin99GT](https://forums.speedlife.net/u/Boomin99GT)\
**Post date:** [November 27, 2007, 10:55am UTC](https://forums.speedlife.net/t/what-causes-a-muffler-to-explode/39334/13 "2007-11-27T10:55:47Z")

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I’d say your bi-canusion double deflector valve was stuck open. Check the side with the vacuum hose on it and see if its pulling any vacuum. If it is then thats clearly not the problem. If its not that then you’re definitly looking at atleast 1 set of muffler bearings.

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