Squealing from Engine Bay [Listen to the video]

fryzia23

Spray the belt with wd40. If it goes away momentarily you will know it’s the belt itself. If not then you will have to take the belt off and check each pulley as already suggested. If it’s one of the accessory then it’s gonna be harder to pin point. I would put my money on of the idler pulleys. Belt squeak it’s usually higher pitched.

fairladyATX

I just sprayed it wither WD40 and with water, no change.

Going to probably drop it off somewhere to have t diagnosed. Hoping its just the belt though.

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"Casual" track car...NASA TX.

Dreadnaught

Screw taking it somewhere lol.

If you have jack stands get the car up in the air and take off the belly pan. Have someone start the car or you could do it yourself and listen for the noise with a long screwdriver. Put the screwdriver end on each pulley and accessory being careful not to get it caught on the belt. Put the handle part of the screwdriver up against your ear. Once you think you pin pointed the culprit pulley or accessory making the noise, take off the belt. Then spin the suspected pulley/accessory by hand and listen/look for grinding, a cockeyed pulley and a feeling of hard to turn.

Since the price of everything is going up save some money by not having to pay someone diagnosis and labor to install the new part. Also, I'd replace all idler pulleys, belt tensioner and the belt if you got some miles on your car and your going to be in there anyways.

Just to further everyone's knowledge, I have had bad belts not sound more like a growl and not a squeal.

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Ford Diesel and Heavy Line Technician at your service.