Hello all. I've been lurking here for a while now and decided to register. I need your help.
I purchased by '04 Grand Cherokee in August. About 3 or 4 weeks later I started hearing a very low noise coming from the front end (passenger side). That noise has since gotten worse. It's a awfully terrible grinding noise (sort of like metal on metal). This noise happens when I go over bumps. I took it in for service 2 weeks ago and was told that they heard nothing and found nothing wrong. Well, here I am 2 weeks later....I leave home this morning to take my son to school and there's a huge puddle of anti-freeze on the ground. Once again I called my dealership but they can't take my car in until tomorrow.
Has anyone experinced this sort of noise before? All replies are truly appreciated.

sounds like a bad water pump. try loosening the belt and looking for a wobble in the water pump pulley.

why would the water pump make the noise when going over bumps?
does the noise happen when it's cold outside (less than 50F)? does it sound like a creaking noise when going over bumps?

I have a similar problem, but don't have the coolant leak. I'm not even sure it's a related issue.