2010 x5m power steering fluid leak

[TROYJEUP]

Hey guys,

I have a 2010 x5m, 112k miles.

I was hogging on the car today with many high rpm blasts. All of a sudden, the power steering reservoir evacuated itself of fluid. Spent five hours working on it and have found no leaks, aside from an over pressure in the system which results in fluid overflowing and exiting out the top of the reservoir after 4k rpm engine speed. Any thoughts?

Thanks,