Engine noise at idle. Has anyone heard this before?

[my mostly 36 coupe]

I removed the fan belt and the random "ching" noise that was more pronounced at low idle was completely gone. So I figure somewhere in the water pumps or generator bearings, fan blade. With the belt removed (and engine off ) I tried to wobble the bearings by hand but they seem the same and without noticeable play. Thanks, Tom

You can hear this at the link below.

https://vimeo.com/159570099

[Ken/Alabama]

Check to see if the tips of the fan are touching the bottom side of the top tank on the radiator.

[Mark's 37]

Originally Posted by Ken/Alabama

Check to see if the tips of the fan are touching the bottom side of the top tank on the radiator.

I agree it sounds like something is hitting the fan blades. Higher RPM may torque the engine enough to move the fan away from whatever it is interfering with. Belt stretched and adjustment to take up the slack too much? Motor mounts weak? Hope that helps.

Mark

[cmbrucew]

Sounds like a broken pulley.
Bruce

[FrankWest]

Fan blades or pulley..something external touching. To much play in pulley ot something so that it slides in and out and touches. Check for play....

[my mostly 36 coupe]

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Ah, That's it! Problem identified. Thank you Ken and Mark for your keen insight. I will be getting a new belt thus lowering the generator somewhat.