My power steering pump has been squeally ever since I got my car back from getting the new engine installed. Additionally, P/S fluid would bubble out of the resevoir when the motor was running. I thought this may be due to overfilling and the system working out all the bubbles after re-filling the system.
Then, it stopped squealing for no apparent reason. So, I checked the resevoir again and it was low. I proceeded to re-fill the resevoir to the recommended level and as soon as I added fluid the pump starting making the awful squealling again! What would this be caused from? If anything, I thought additional fluid would result in less squealing. Bad pump?
On another note, I have a strong suspicion that the mechanic swapping my engines added brake fluid into the P/S resevoir. I can't confirm this, but I think I will drain as much P/S fluid as I can and try to refill it with P/S fluid.
