Just had to pull my front cover due to it leaking on the drivers side. Never knew it was there until I was unde the car doing something and saw a small ting of green and followed it and spray up top/ front cover where h2o pump bolts up with brake clean and drove the car and walla found the sucker. Mine was leaking front cover to block
Couple of question. How much are you adding and how old is your rad cap? Reason I ask about the cap is because if it's not holding pressure properly the engine will heat up and some coolant will excape as steam. Seen this many times on customers cars. New cap usually fixes it.