Knock-knock! - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 4 (permalink) Old 04-01-2013, 11:54 PM Thread Starter
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Question Knock-knock!

Hi there! Currently, I have but one issue with my 2007 LT - she knocks at me! After about 5 or 6 minutes of the engine being on, a knocking comes from the rear driver's side. It's 5 knocks, exactly like someone is knocking on a door. Always exactly the same. Has anyone else experienced this?

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post #2 of 4 (permalink) Old 04-02-2013, 04:48 AM
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That is your emission vent canister cycling, all normal some are noisier than others. It sits behind the fuel tank passenger side.

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post #3 of 4 (permalink) Old 04-02-2013, 11:50 AM
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yep,
its our mysterious body in the trunk.

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post #4 of 4 (permalink) Old 04-02-2013, 11:58 AM
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I always heard it from the engine bay, but same exact thing. Never had a problem with it.


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