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Old 01-05-2013, 01:01 AM   #4
trey30
Registered User
 
Join Date: Jun 2011
Location: San Antonio, Texas
Posts: 40
My Ride: 2004 330ci
I have a 330ci and recently experienced the same thing. Placed ATF in the power steering reservoir and the problem (whirling) went away immediately. I know I'm not much help since you know it's not a fluid issue. But wanted to say to also check the belt around the ps pump.

There is an aluminum reservoir out there too with greater capacity and higher heat threshold for future use and a nice, simple, low cost upgrade.
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