What bearings need replaced? Engine squeak

Hi All:

2011 2.7. Been wet around here and the engine bay has been soaked a few times.
Now I have what is a squeak/grind. I imagine its the belt idler bearing.

I cant seem to find a definite answer on what all I should replace.
I think there is a tension pulley, and some idler pulleys?

Can someone clue me in on the part numbers? Is it 1 idler and one tension pulley?

Also read you can replace just the bearings? But that was for a v6. Couldn't find anything on my 2.7.

Thanks.

 

Okay. I found out I have 3 idler pulleys. Im going to replace all 3.
Where is the best place to order parts online?

 

https://www.camelbacktoyota.com/

 

Not impressed with the camelback parts dept. He said I could not purchase the idler pulley on the bottom separately. Said I had to buy a mounting brkt with it. @ $309.00. Nope. Not right. I am going to go to my local stealership and let them rape me for less.

 

So I went to have a look at the work required to do this. Put a wrench on one of the pulleys.
What is the torque? Seemed like I was going to break the bolt. Are they reverse thread?
Anyone ever done this on the 4 banger and have some tips?

 

Bueller, Bueller?

 

I've done it on the V6, getting the belt off was harder than changing the pulley. Did you look at rockauto.com for the pulleys? I got mine there for pretty cheap. As far as torque, just don't crank them on.