Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2008 Nissan maxima 140000 › Reply To: 2008 Nissan maxima 140000 March 24, 2020 at 11:05 pm #953553 Richard KirshyParticipant Sounds like the bearing is failing in the alternator. Quick and dirty test would be to take off the belt for the alternator and start the engine. If the noise is no longer present, you either have a bad alternator or alternator tensioner pulley.