I've been trying to figure it out. Replaced harmonic balancer and the belts. AC belt not on at the moment. Noise comes and goes, but usually happens when the car is cold, or after the car has been ran hard for a while.
Noise will go away on its own. Water pump?
https://www.youtube.com/watch?v=7W7PuW1j34E
Please post any thoughts you have.
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