Pulley noise

[Jbarker83]

Got a used Mustang gt and there is a loud squealing noise coming from the pulley area I sprayed belt dressing on it and it got quiet then really loud squealing / grinding noise started not sure which pulley it is anyone have any y ideas??

2001 gt 73k on it

 

[Scud2]

Got a used Mustang gt and there is a loud squealing noise coming from the pulley area I sprayed belt dressing on it and it got quiet then really loud squealing / grinding noise started not sure which pulley it is anyone have any y ideas??

2001 gt 73k on it

Start with idler and tensioner

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[Jbarker83]

Anyway to tell which could be going bad

 

[SnakeBit!]

get a mechanic's stethoscope or a long screwdriver and listen to each. you should be able to tell. if not, spray a little wd 40 on each, one at a time and see if he goes away.

 

[Jbarker83]

Never did that screw driver method lol I sprayed belt dressing it made it 10x worse didn't want to drive the car anymore lol