PearlWhiteGT

I have some sort of howling sound coming from the front of my engine compartment. It dosen't make the sound @ idle only when I rev it up between 2K-3K rpm's. I've noticed that it's louder when the engine is cold or been sitting for a short amount of time. After I drive it for a few miles it quiets down a little but you can still hear that howling sound. I replaced the fan clutch, belt,tensioner pulley, alternator, water pump & bypassed the smog & power steering pump. After all this it still makes that howling sound. It's on a 1990 GT W/ 302 Any ideas on what it may be??????????????

Thanks
Mike

PearlWhiteGT

Anyone???