I have a 2003 crysler intrepid 3.5l, yesterday steam started to come out my vent and prestone started to come out the back vents on the floor and started to over heat, i stoped to check it out and i had alot of prestone on the ground under the passanger side door, i put water and let it cool down to get me home...today i started it and seems to run ok ,but no heat commin from vents......can someone please help me
Sounds like your heater core is leaking antifreeze.
Chris is most likely correct. All the indications lead to the heater core or one of the connections leading to it. This is a moderately difficult fix. If you are mechanically inclined, get yourself a Haynes or Chilton for your make/model and buy the part. It will be frustrating, but a lot less expensive than taking it to a shop.