maybe your fan clutch is going? i know that mine used to make a funny wirring sound for a little bit when i started it up and the fan clutch was going
my parents truck uses a clutch fan and it always makes that sound, maybe just the clutch warming up? i dunno...just throwing ideas but it sounds fan-related to me....
my parents truck uses a clutch fan and it always makes that sound, maybe just the clutch warming up? i dunno...just throwing ideas but it sounds fan-related to me....