Hyundai Elantra Forum - View Single Post - Popping Noise
Thread: Popping Noise
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post #3 of (permalink) Old 03-05-2014, 11:24 AM
Easy Rider
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Originally Posted by SWS View Post
Usually it is right after it has been driven, not sat for a long time.
Given your description, it is HIGHLY likely that this is just the exhaust manifold, exhaust pipes or the catalytic converter cooling off and "popping" due to the metal expanding and contracting.

On some cars, it gradually goes away as the car ages but on some it continues to do it seemingly forever.
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