If you don't see an external leak around the engine, and no white smoke out the tail pipe, add a small bottle of dark purple dye to the coolant, then check with a black light a day or two later. The dye will show up as a bright yellow stain that you can follow back to the source. Be sure to check the tail pipe. If you see the dye there, the cylinder head gasket is leaking.
Monday, September 16th, 2013 AT 11:11 AM