Hi Chris. I'll be in touch shortly(once I get the car up on a lift). Do you think a case or housing cracked? I have 4 new 12a housings in the Mazda boxes.Drop me an email if you'd like to discuss the engine and what we can do to get you going again. [email protected] The freeze plugs located in the front and rear iron. If the front ones pop out the coolant will drain into the oil pan. If the rear ones pop out the coolant will drain into the bell housing. If something is coming from the middle of the engine that's not a good sign.
Don't sweat it until you can check the drain plug. That's your most likely scenario. On the 13B the drain plug is kind of hidden - goes through a hole in the driver's side engine mount bracket.