I've got a 2010 Kizashi SE. A few days ago when I started the car I heard a slide knocking noise coming from the engine but in a few seconds it disappeared I assumed because it was cold ( 20F(-5C) ) or less it was normal just some knock till all the oil get everywhere. Today however this knock continued for a longer time so I popped the hood up and noticed that the the A/C clutch was trying to spin but wasn't able to. I turned the A/C off nothing changed the clutch was fighting the belt and the belt started to squeal. I needed the car so I drove away in 20 miles everything was ok no noise no problem with the clutch just that a narrow part of the belt peeled off. I know I have to replace the belt but What is causing the clutch to fight the belt ? Any ideas ?