Hi Again, This isn't exactly K5 related but in the ball park. A week ago the alternator took a dump on our 89 Astro van. I replaced it with a rebuilt from Advance Auto. They didn'y have an AC Delco and it would take over a week to special order one so I took their no-name rebuilt. Now I believe the bearings may be going out of the new one because it squeals shortly after I start the van and gets progressively louder as it warms up. I still have the old alternator which is a 100 amp CS 130 and was thinking about taking it apart and seeing if I could rebuild it. I removed the 3 external torx bolts and the pulley, but I can not get the housing to seperate. It is broke free but the front housing will just rotate and will not come off of the shaft.......any ideas?? My other question is how can you test other items that may be causing the squeal on vehicles with a serpentine belt. Once the belt is removed nothing spins and I have no way to rotate these things fast enough to see if there are other problems besides the alternator. The belt tensioner pulley seems to have a lot of wobble in it with the belt off and may be part of the problem, and with the belt off the rebuilt alternator has a high pitched squeal when turned by hand. I would like to rebuild the old alternator if I can get it apart, and also need to know how to isolate other items that may be squealling........thanks.