Hi all! New to the forum. Trying to help a friend fix their 1990 Corolla. The big thing we're looking at right now is it appears that the outside of the crankshaft pulley has fallen off. From what I can see by looking online the pulley should have a middle to it. We have a ring instead. Photos attached. Do we need to replace the whole crankshaft pulley or will this outer part hold itself back on once we get the new belts in place? Thanks!