Power Steering Noise When Cold

Power steering noise from a 2009 Subaru Outback. Engine cold.
Flushed the system with roughly 4 quarts worth.
Replaced Oring with Orange Subaru ring.
Replaced the hose.
Used a Mityvac for roughly 1 hour at 19 with front wheels off the ground rotating wheel every way possible.
Seems ok after all this, but engine has been warm for a while.
I roated wheel with engine on and off. Nothing else could have been done.
The next day, same issue and every day forward. Once warm it's not as bad, but when cold it's very bad.. foaming in the resivour..
No leaking power steering fluid.

[@lour5802]

OK, so where's the fix?

[@InnerLuminosity]

Definitely needs new O rings

[@aldywahyu]

*Inner-Luminosity* which part?

[@ryans413]

It be leaking if it need new O rings. It’s just from the cold once fluid circulates and warms up noise goes away.

[@phuocloctho7771]

new o ring needs to prevent air from coming in. Keeps longer may needs new pump.

[@ewebbytrailscout]

needs power steering pump, just did mine

[@ssalamri7302]

change your power steering fluid every 40k and it will last for long time

[@timatinaj1418]

So how did u fix the problem?? Changing the power steering fluid ??

[@georgepower7115]

It needs a pump