Loud chirping noise.

If it's your water pump the better 5/8" shaft one is at Rockauto #AW7103H $59.79...close to $40 cheaper than Summit. They sell Gates too for $31.79. Should have scallops on the neck, not Gatling gun holes. No reason to buy the 1/2" one mechanically...except aesthetically for originality I guess. Cheers.