or an alternator charging your batteryFrom the vid, noise is louder when yer phone is forward in the wheel well.
I would guess a tensioner or idler pulley is on it's way out.
Remove the drive belt, try to duplicate. Water pump is gear driven, not belt driven, so there's nothing to harm by running the engine with no drive belt on it.....other than you won't have power steering or boosted brakes.
HUGE amounts of things in the engine bay are easily accessed thru the fender wells on the HDs, so familiarize yourself with removing 'em.....easy stuff.I’m still learning so I don’t know what I don’t know about diesels yet haha
Yup I actually have the link to that post in my inbox when I first signed up. Read through a bunch of them already. Great infoSince you are still learning, this thread may be of interest to you:
WELCOME to the forum. First; I see lots of first time posters who quite obviously have not read this series of threads that is suggested by the forum creators........Their initial post describes one malady or another with which they want help..GREAT we are all here to help, BUT do us the...www.duramaxforum.com
PS, when you go to some of those links, you will recognize the author. No it is not me.