Hi Everyone, I have a 2013 Explorer, V6. I noticed in the last couple of days, from a cold start to about 10 to 20 minutes into the run, a fairly loud squealing sound. Coming from the front end area. It is more pronounced while under load, quiet when idling at a stop. I have changed the Tensioner and Belt today and it is still doing it. Alternator is less than a year old, AC Compressor is about a month old. So I would think those pulleys would be OK. checked the Brakes and they are all good. Any ideas??

 

Sometimes this helps, Loosen the belt, rotate each pulley, AC, Water pump, Idler on tensioner, and Alt. We try to feel for any roughness in their bearings.

 

Hi, Thank you for your reply. When I replaced the Tensioner and Belt, I checked the Pulleys on the Alternator and AC Compressor. Both felt good, smooth spinning.

 

I have since replaced the front rotors and pads, thinking I might have glazed them, that did not fix the problem.

 

Is there anyway you might have someone wait and listen if the squeal is louder on one side or the other. That would help narrow down the area to do further checking.