Is the pulley moving too? If so it could be the water pump on its way out. I am picking up a new pump in the morning mine was wiggling a bit now its leaking. I am assuming you checked the obvious things like loose bolts.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!