I have this problem. Must add coolant each month. Leak is from the bottom of the engine. Most prevalent during the warmer months. Is there a recall on this?

Losing coolant, no leaks on garage floor, smokes out of tail pipe on start up. You can smell coolant, no sign of coolant on dip stick and no sign of coolant when oil is changed. Dealer replaced drivers side turbo and problem was gone for about 2 weeks and is now back. Engines seems to run ok, no check engine light is on. Turbos are cooled with engine coolant. Is this a common problem with the eco-boost engines?