Misalignment of the accessory pulleys or a faulty drive belt tensioner may cause a chirping or squeaking sound while the engine is running. In If the replacing the belt tensioner does not correct the noise, the alternator pulley may require replacement.
Belt Noise Due to Pulley Misalignment or Belt Tensioner on Dodge Caravan
Average mileage: 123,028 (85,000–187,000)
Engines affected: 3.0L V6, 3.3L V6, V6
7 people reported this problem
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Chirping or sqeaking sound coming from belt tensioner or alternator pulley.Sound gets louder as I accelerate.Do not know which to replace or how .If someone has had this problem, please give me some answers.