ok so i've been leaking antifreeze for a little bit and today i finally got to get under the car to look where the leak is coming from. Well i found that it is coming from the passenger side firewall up about6 inches from the bottom and theres a little tube that comes out and stops. Im told thats from the evaporator for the AC or something and my friend told me that means my heater core is going out when it starts leaking antifreeze out of it. Every time I turn my heat on you can smell coolant inside the car. Heater core was just replaced about 1 and a half years ago why is it going out again...? thanks guys