Ou have an external leak or a leaking cylinder head gasket. If you don't see wet spots under the car, you can verify a leaking head gasket by adding a small bottle of dark purple dye to the coolant, then search a day later with a black light. The dye will show up as a bright yellow stain that you can follow back to the source. If the head gasket is leaking, you'll find the dye inside the tail pipe.
Thursday, July 10th, 2014 AT 12:03 PM