Can't I just replace the bearing instead of the whole unit? it's just a bad bearing. What's the part number on the bearing? I saw it somewhere and can't find it now. I have a feeling it's burning my alternators.

 

Yes, you can replace just the bearing. I've put new bearings in 4 or 5 tensioners pulleys.
Part # 6203-2RSJ About $10

 

FiSh can I just use a bench vice to push in the bearing?

 

Bench vise and a couple appropriately sized sockets. Hardest part is getting the snap ring out.

 

Or you can buy just the pulley with new bearing for $15.

 

You have a source or the part number?

 

This is what I did, took like 15 min to R&R.

Duralast/Belt Tensioner (231081) | 1997 Land Rover Discovery 8 Cylinders 2 4.0L MFI OHV | AutoZone.com

 

Personally I'd feel more comfortable replacing the bearing in the genuine pulley than run that.

 

Thanks fish. Prob pretty easy to complete the swap never met a bearing I couldn't pull or replace. I don't know about AZ stuff I'm on my 6 th alt from az that I just replaced today with last one in the city. It cracked while torquing it on so one of the arms is split cheap az rebuilds, now I need another one for warrenty but will prob just get money back and get another mag mirelli. Though I'll keep an open mind, spike what kind of
Milage and report can u make on the pulley? Does it see mud, water, and sand on occasion?

 

That pulley has been on my truck for 4+ years now with zero problems, I'd have to say close to 50,000 miles on it.
Mud and water and stuff will not get into the engine bay unless you are doing it wrong.
The A-Z pulley is just as nice as the OEM one.
Do what you want, but man was that way easier than replacing just the bearing.
Loosen the belt, remove the bolt, pulley falls off, put new pulley on, put belt back on.
Seriously, 15min and you are back on the road.