I hear what sounds like a buzzing noise from the alternator area on my 1985 toyota pickup, I can't tell if its bearings,water pump,pulley or alternator( the alternator replacement is new I just replaced one week ago bought at Hexautoparts.com) Because I seen no common symptoms of any problems associated with these - No overheating, coolant leaking or lights dimming or any wobbling to guide me. Suggestions? Thanks.