I'm glad I could help! 👍

That's a pretty common thing you'll see on a lot of engineering documents and parts to represent interchangeable revisions of the same part over time. I would normally expect to see something a little more logical, like my original pulley being an "A" rev, and perhaps my replacement being up to a "D" because of "reasons", but I guess Chrysler decided that "AE" is the correct revision level. I'm hoping that doesn't mean they ran through the entire alphabet once, looped back again, and are already up to "E" the second time. I'm going to guess it makes sense in a way I simply don't understand. Like Rev level A, supplier E.

You're very welcome. Thanks for watching! 👍

LOL! We'll get to that!

Hummm... I've never heard of that before, but it's something I'll be sure to pay attention to in the future.

And how tight should it be I replaced it and 2 days later it flew off on the highway

I'd be willing to bet it's dealer-only and discontinued a long time ago. If you absolutely want the factory part, a junkyard would be your best bet. That said... I don't think there is anything special about it. You should be able to get something pretty close from your local hardware store, or McMaster-Carr, and adjust it to fit properly.

@@Elijah-dh7qg Frustratingly, the factory manual doesn't specify a torque on that bolt. I'd probably go with 35ft/lbs for that size of fastener.

I ended up replacing both idlers and the alternator. All of that is in the playlist for The Jeep (linked in the description). Then, _once_ this spring, the belt chirped on start-up. 🤦‍♂ I quite suspect this pulley's bearing has very little grease in it. I don't think I popped the seals off to check, but I should have. If it gets worse I'll just replace the bearing. No clue on the alternator pulley bolt. My replacement alternator came with a new pulley.

@@TheBrokenLife awe bummer, dang chirps that stinks. Thank you Sir.

@@dad3562 If you have a little bit of time on your hands, pull both idlers, pop the seals off, and grease them up. You might get out of it for no money. My alternator was an unrelated issue.

@@TheBrokenLife I’ll definitely try that!

@@dad3562 Good luck! 👍

It's metric, but other than that I don't know for sure.

Such is a life of our things owning us. 😆

Oddly enough, this is the project that caused me to buy a stethoscope. 👍 Both idler bearings were bad.

I can document the history on mine back to about 20,000 miles so I would assume everything you see in the video is how it came from the factory. Is it needed? 🤷‍♂️

@@TheBrokenLife yes it's needed. the pulley would rub on the back if you don't have some sort of a spacer. Sadly, I'm trying to find that spacer, and am about to just get a bunch of washers. :(

@@chrishumphries2779 Washers would probably work, but it shouldn't be more than a few bucks for a machine shop to turn one for you. As I recall, it was nothing that special.

this is the spacer, Mopar 6034408SPACER-IDLER PULLEY and in theory I'll have one tomorrow. :(

@@chrishumphries2779 Good luck! 👍

1999 Jeep.

The best way to find out is to start it up without the belt installed and see if the noise is there. Then you at least know its in the accessory drive.

@@TheBrokenLife Thanks!

@@worldpeace5853 You're welcome! Good luck with it! 👍