I did see a reference to the auxillary water pump on a forum. Trying to locate that info. I have received responses saying there is no aux water pump. The sound is coming from the engine area, louder towards the passenger side towards the back. Someone checke from under the car and said that there was no vibration from the starter but could feel vibration from the oil pan area. I just got the starter replaced and at first thought that it was the starter motor running without engaging.
Thanks