1LEZ

I have a 1990 Z and there is a squeak somewhere in the serpentine system. When I change belts it goes away for a time. It also gets better after its been driven. I had a spare tensioner so I installed that last week. That seemed to do the trick for a while but I started it today to move it and it seems even worse. One thing I have noticed on the water pump pulley where there are no grooves is it seems to be riding as far back as it can on the pulley. Not sure if this is normal or not. Any ideas or suggestions would be of great help. Thanks!