Jesse_Wenting
Old Thread Reviver
Need some help understanding why my new alternator is making a whining noise. I replaced the belt, tensioner and idler before the alternator and there's no irregular moment in the alternator pulley, however there is a slight whine when hand turning and the pulley does not free spin for more than about a second. Voltages are 12.43 off and 14.49 at idle, but the battery I'm using has been below 10v at one point