Lucky you!
I went through this nearer to 70,000 miles. When my tensioner went, it threw the belt in the middle of BFE. Started to overheat due to lack of water pump turning. Had to pull over, park it, and come back later and fix it on the side of the road.
Belt tensioner is pretty easy to replace. First things first. It is the pulley below your power steering pump. Is the belt pretty centered on the pulley? Or is it leanig off the front edge of the pulley? Mine was leaning off the front edge pretty bad when it went. No matter I guess, if its squealing you gotta replace it, the bearing is bad.
I tried all manner of "belt lubricants", etc. Nothing worked. It continually squealed, and all the lubricant did was cause the belt to come off the pulleys. So don't go there. Get a new pulley from Auto Zone and fix itonce-and-for-all!
As for the Cam thingamajig. Go ahead and remove the two 7/32 bolts, remove the sensor top (the bolts will stay on the top), drop some oil down there, and re-install the top. This thing will go bad eventually, and when it does it takes the oil pump with it!
This is located on top near the right rear valve cover, where a distributor used to be prior to 1997. Really it takes all of 10 minutes to do, and may save you a whole lot of grief later. Do this frequently, as in my case about once a month from here on out.
Preventative maintenance. Love it now or fix it later!
