2013 M3 a/c expansion valve was leaking,,,,interesting that the expansion valve was leaking,,,they never leak,,,,they usually get blocked or don’t open up to let freeon through,,,,the funny thing the a/c is on a BMW race car,,,,,does a race car need a/c really

This is where it was leaking from,,,,it was leaking from the valve end,,,,,the only way I found it was with a/c dye and a mirror