2009 Honda CRV was rattling and noisy while idling. Dealership told me the rattle was from a loose heat shield on the catalytic converter. They wanted $32 for the job. I will show you how to do it for just $4. And it's the same fix the dealership would have done. Ha!

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Do not remove the heat shield, it's needed to maintain high enough temperatures for the catalytic converter to work properly.

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