Ive been experiencing a weird noise when the cars at idle at random times. It Sounds like a running tractor. I have posted a YouTube video With the problem. Any input on the cause of the problem would be greatly appreciated

 

Timming chain tensioner

Exactly how mine sounded, ill post my link up so you can read it over. Everything you need is in it.

https://www.cobaltss.net/forums/prob...-worst-301922/

$75 part from gm ( cheapest i could find was from the dealership yes )
And a 1 hour job. Torque wrench is needed


And by the sounds of it. How it does it at idle , and for long periods of time. Which mine didnt, i would fix it NOW. Its gone alot further than mine did before i fixed it. If it lets go, bye bye motor