Usually, a squeaking/chirping noise IS a bad idler pulley. As far as it costing over $200 to replace, that's ricdiculous. Another thing that could cause a chirping noise could be worn out bearings in the alternator. If you know what the alternator is, try listening to it close and see if that's where the noise is coming from.

Answered by catch_15
1 question asked

Thank you for replying to my inquiry on Squeaking/Chirping Noises from Engine. I will inform the repair shop to look into the bearings in the alternator since I had the idler pulley and the serpentine belt replaced. Thank you so much, hopefully this will end my endless nights of sleep.

Yes, they did charge me a little over $230 for the idler pulley and the serpentine belt replacements. I knew I got ripped off the first moment I stepped into the shop.

Response from Kochanhs
11 questions asked