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Why does a catalytic converter rattle?

Updated: 10/21/2022
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14y ago

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Normally the heat shield on top of the converter is the source of the rattle. It is possible the the converter medium itself has broken into pieces resulting in a rattle that sounds as if there are rocks in the converter. If the heat shield and the rest of your exhaust seems secure, it is likely the converter needs to be replaced.

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14y ago
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Q: Why does a catalytic converter rattle?
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