I noticed engine coolant leaking on my driveway this morning. I took it to my local Meinike Muffler shop (this guy will put it on the rack for me and give me his 2 cents, no cost). He stated he could not tell exactly where the leak was coming form but it appeard it was coming from somewhere in the back of the motor. There are lots of posts about the manifold, could this be it (understand I am not mechanical). What is the worst case scenario I am looking at. Thanks all!

It was leaking on the passenger side.