2011 5.3 engine noise, lend me your ears

[Gearz]

That sounds like a belt tensioner and when you cleaned the TB the idle changed and the sound changed because of the idle speed. Did you remove the belt like another member said? I had a Equinox do the same thing. TB need to be cleaned 30-50k miles.

 

[Toyota2Tahoe]

Codes thrown are P0521 P0523, I've already replaced the oil pressure sensor (you can see it right around :40), boy was that a task.
I have not done the DOD delete, makes the noise with belt removed. I'm wondering if this is a lifter.
What do your ears tell you?

I had a bad belt tensioner that sounded like this on my 2011 Tahoe. No expert just 2 cents

 

[Brawny]

Both good guesses, but nope.

 

[j91z28d1]

so you cleaned the throttle body and all that noise went away?

 

[justchecking]

Post the sound again with the serpentine belt off. There seems to be two things going on. One sounds like a bearing in the tensioner, idler, or alternator. The other sounds like a rattle.

 

[Fless]

I haven't read all the responses but the first part of the audio sounds a bit like an exhaust leak to me.

 

[MD-Wood]

It sounds like its more to the front of the motor. It may just be the video. if its more to the front it would be the timing chain tensioner/guides. They are plastic and break when their old.