Not a problem, that is what we are here for. My alternator was still charging fine but you could hear the whining noise closer to that side of the engine. It could be the water pump pulley bearing too. I did replace that in December too. So for me the only original accessories on the front of my engine are the power steering pump and AC pulley. If you take serpentine belt off, you should spin the Idler pulley first. If it continues to spin for a bit, then the bearing is bad. If it stops fairly quickly, then it is okay. As for the belt tensioner pulley, they feel gritty when spun tested. You will not be able to feel any difference in your alternator pulley if the internal bearings are starting to go bad. Let me know how you make out and good luck.