well what i have done before see exactly where the noise was coming from is put the front of the car on jacks stands, not the jack from the trunk but an actual stand. Set your brake and chok the rear wheels then take both of your front tires off and start the car and put it in drive, and while the wheels or lack of are turning have someone listen for the sound as you turn your steering wheel from left to right to pinpoint the location of the sound.