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  1. #1
    Active Member Two Rings BrilliantB6S4's Avatar
    Join Date
    Oct 08 2018
    AZ Member #
    428435
    Location
    CT

    Power steering problem

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    Out of no where the power steering pump started whining and when I went to check fluid it was full but it was foamy. I changed out the fluid and bled the system but the fluid is still full of bubbles. Idk if the pump is shit or I should be looking for air leak.
    Attached Images
    2004 Brilliant Black S4 6MT

  2. #2
    Senior Member Three Rings Velox's Avatar
    Join Date
    Mar 30 2016
    AZ Member #
    371041
    My Garage
    audi
    Location
    Oranjestd

    That's caused by air/leak mine did the same when return hose was leaking also accompanied with the whining

  3. #3
    Senior Member Four Rings VinnysS4's Avatar
    Join Date
    Nov 12 2015
    AZ Member #
    364349
    Location
    Oregon

    Most likely a leak in the system causing air to cavitate inside the pump and thus you have foam.

    Sent from my SM-N920V using Tapatalk
    1997 VW GTI VR6 (sold), 2003 Audi RS6 (sold), 2010 Audi A4 2.0T (RIP Totaled on 11/2/2015 ) 2005.5 Audi S4

    My build log
    http://www.audizine.com/forum/showth...-s-s4-timeline

    Texpoops "Correct, but a half inch difference isnít going to accelerate wear by much. Iím sure the front dips that much with a fatty in the front"

  4. #4
    Senior Member Three Rings DarrenOman's Avatar
    Join Date
    Nov 04 2014
    AZ Member #
    292854
    Location
    Oman

    I had the same thing but with no visible leaks. The pump metal discharge pipe connection to the flexible hose was sucking air into the system, I had to disconnect and rejoin using TPFE tape.
    Took ages to find

    Sent from my SM-G935F using Tapatalk

  5. #5
    Senior Member Four Rings VinnysS4's Avatar
    Join Date
    Nov 12 2015
    AZ Member #
    364349
    Location
    Oregon

    Yeah the clip that holds my return line had worn through my return line and caused a tiny tiny leak that caused this exact issue.

    Sent from my SM-N920V using Tapatalk
    1997 VW GTI VR6 (sold), 2003 Audi RS6 (sold), 2010 Audi A4 2.0T (RIP Totaled on 11/2/2015 ) 2005.5 Audi S4

    My build log
    http://www.audizine.com/forum/showth...-s-s4-timeline

    Texpoops "Correct, but a half inch difference isnít going to accelerate wear by much. Iím sure the front dips that much with a fatty in the front"

  6. #6
    Established Member Two Rings
    Join Date
    Sep 17 2014
    AZ Member #
    283343
    Location
    Columbus, OH

    Most likely a leaky PS return hose. You can buy the hose for ~$120 and change it yourself fairly easy, or pay a shop $700-$1200. Could take anywhere from 1-6 hours depending how well you work in tight spaces. Only requires removal of front driver wheel. Banjo bolt is 7/8" and you don't need an offset wrench to loosen it. I did it a 1/4 turn at a time till it loosened up.



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