It may be a bad pulley or a bad tensioner. Recheck your work and check pulleys if you just bought a belt you should have gotten a kit because it gives everything you need. And tensioner should be replaced as well. By now you may have bent the valves because when a belt goes off on your engine it does that as it is an interference engine. You should rent a manual for replacing belt as instructions are quite specific and lengthy. See pictures.
Images (Click to enlarge)
Wednesday, December 7th, 2016 AT 12:20 PM