Truck made a strange noise at start-up the other day.
Similar to a belt squeal, but definitely different
I checked the belt, (even though it is new)

There was a glob of something on the surface of the idler pully which I cleaned off but that didn't cure it.

I noticed a black gummy substance at the boundary of the inner and outer portions of the AC compressor pully, so:
I turned off the a/c and restarted then the noise went away even after I turned the a.c. back on.

Any ideas?

Edit:
The a.c. clutch functions / stops if I pull the clutch relay fuse.

Last edited by OldmanoftheSea; 04/13/21.
-OMotS


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