So I posted a video of this Rattle coming from my engine. This is supposedly a timing chain roller fault. I'm going to the dealer with this next week.
http://www.youtube.com/watch?v=8FSf0-dTFLI

oh yeah, the video is inverted horizontally for some reason


Here are two other threads that reference this problem.

https://www.cobaltss.net/forums/general-cobalt-68/secret-tsb-i-thought-everyone-should-know-about-54519/

https://www.cobaltss.net/forums/problems-service-maintenance-69/engine-rattle-190528/

 

Thats exactly like my friends 2.2 sounded like when the tensioner went bad .

 

That sounds rough, not hardly as bad as this guys Civic tho

 

Just replaced the chain tensioner in mine for a very similar noise..

 

it is the tensioner i know that 100%