Best serpentine belt for Ford 6.8 V10?

[Bullitt6283]

Originally Posted by MW22r

Does any part of the Serpentine belt system ever sound like a metallic rattlesnake? No seriously, only on acceleration my V10 makes a metallic rattling sound. Goes away when not accelerating. Getting worse. Very annoying. Someone suggested a potential heat shield but I have no clue where they are unless the rig is raised so I can get under it.....

Does yours sound like this video?
https://youtu.be/Oa6cr2dFkPE
If so, adding the missing pulley is the fix.
.

[THenne1713]

Blower Motor trying to seize? Replaced my seized blower this past year. Idler Bearing, Alternator Bearing, Water Pump Bearing?

[Steve Boat]

Originally Posted by Bullitt6283

I changed to the Gates K060997HD also. It was quiet for a while, but the noise came back. I'm going to add the idler pulley.
.

I went to Ford and got the bolt, they did not have the wheel and bearing so got two NAPA parts easy install TO EASY! Did not have to remove belt to install. Noise is not gone, talked to my Ford gy he said the NAPA, ORielly belts are the wrong size, I get the ford belt Tuesday for 70 buck we will see!