sonny
Living Legend
This may be a long shot but have you checked to see if your radiator fan is loose? When i replaced my clutch i took the radiator off and found that the three bolts holding the radiator fan in place were loose two of which were about to fall out. You mentioned it did not make the noise until you where almost to work. As long as the fan is not running no noise but you could hook up Tune ECU and run a fan check. Like i said it is a long shot but you never know.