Hi guys new to the forum I need help figuring out this chirp noise,I have looked up other forums and YouTube videos that have help but now I'm lost. So far I have replaced the serpentine belt oem, new idler pulley, new tensioner with pulley, new ac clutch pulley, and new alternator with pulley. I don't know where this noise keeps coming last night and in the morning I used some Prestone belt dressing serpentine and it cut the noise, but you can still hear it and I parked the truck at work I waited 1 hour and cranked it still makes noise. This is frustrating plz help

 

CAREFULLY use a mechanic's stethoscope to find the noise source.

 

Is the noise there with the belt off?

 

Glc thank you I was actually going to try the screw driver to the hear and see if I could get it that way, low on cash since this truck been needy

 

Jcr no I haven't done that been busy at work, but I will try that this weekend, yesterday when I came back home from work truck was sitting 12 hrs in parking lots, when I cranked it the noise was gonna I drove home and it made it but not as much as the day before I think the Prestone belt dressing kind of help a little bit

 

Check the alignment of all the pulleys with a straight edge. It sounds like one of the pulleys is slightly out of align and the side of the belt is squealing against it.

 

Figured out the problem, it was the harmonic balancer replaced it with one from O'Reilly auto parts and now no more noise. Thanks for the help guys

 

Thanks for letting us know!

 

Excellent!