I had a problem with over heating in the past and now its isnt an issue. Unfortunately when I pulled into school this morning I saw steam coming from under the hood. Not from the front though. It was coming from the driver side all the way in the back nearest to the cab. I'm confused and concerned. It makes a spraying noise while it is steaming. Now that I know a general location of where it is, I would like to know WHAT it is. Please help.