An alternator pulley, of the incorrect size, installed at the factory can be the cause of drive belt failure and illumination of the battery light. The alternator pulley should be inspected and replaced as necessary if the drive belt brakes. When the new belt installed, it must be adjusted to the proper tension.
Battery Light Comes On, Belt Failure, Sometimes Repeatedly on Mercury Capri
Average mileage: 126,166 (87,000–169,000)
Engines affected: 1.6L 4 Cylinder, 1.6L 4 Cylinder Turbo
11 people reported this problem
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Alternator belt keeps snapping. Replaced alternator, and belt 3 times. Mechanics have no idea how to fix it.
Still in shop
Alternator belt broke. Had replaced and drove it 2 days later and it broke again.
had to make sure tension on belt is real tight.