I have never had that problem, thank you. I also never hold the wheels at max turn for more than a second. It almost sounds like you are holding the wheel too tight when trying to squeeze your car into a parking stall. There is a hole in the top of the cap to allow pressure to escape, could that be where the fluid is leaking from?

I worked on a frozen PS line, temp around 0F, where turning the wheel too much caused a little gyser!! A warm up and fluid flush cured it.

Klaus
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Always willing to listen, just not able to take direction.