A few months ago, I had my master cylinder start leaking at the firewall (inside) and would dump the fluid into the cockpit belly pan overnight. I changed master cylinders, and ran the last few races of the year. Now, as I am building the car for this year, I put a brand new master cylinder on the car. I bled the lines and all seemed fine. The next morning, all the fluid dumped into the cockpit bellypan just as the other MC did. Is there something that I need to do or look for that would resolve this issue? A brand new MC should not leak like it does. I tried to troubleshoot what could be causing by removing the stem brake the brake pedal (thinking the rod was too long and was creating an always under pressure situation) but it again dumped the fluid into the cockpit without the brake pedal stem attached. When I bleed the brakes and press the brake pedal, nothing leaks or shoots out. It only does it as a slow leak overnight.
Anybody experience this before and or have any solutions for me?