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  1. #1
    Registered Member One Ring
    Join Date
    Apr 05 2012
    AZ Member #
    91280
    My Garage
    Gf's black A3
    Location
    CA

    Power steering fluid shooting out of the reservoir cap!

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    03' A4 avant 3.0 I had a small power steering leak somewhere, and about once every month or two I had to put a little bit more ps fluid in to stop the groaning. Pretty sure I was using the right stuff--11S. Then a couple weeks ago, I put some more in, and next thing I noticed it was shooting it back out of the reservoir cap.
    I took the reservoir off and inspected it the best I could, all the ports seemed functional. When I put it back together, it just bubbles and splashes out of the top. And when I put more ps fluid in, the power steering works fine and is quiet, but it still shoots out of the cap, and starts groaning again when it gets low on ps fluid. I have talked to 3 different shops and gotten 3 different answers..?%#
    I also tried bleeding it..
    I ordered a new pump last week, but then they emailed back and said they were out of stock. My question is should I start w replacing the ps pump? Or is it possible that it is not the pump? One guy from one Audi dealership said he had only seen this problem once before in 10 years, and it wasn't the pump..
    What ta do? Where should I start?
    And if you think it is the ps pump, can anyone send me a good DIY link for 03' 3.0 ? Thanks so much.
    Doug


    Now I think it is the pump, the return line, or the reservoir...?) In the small hose feeding into the filter, there are two hose clamps about 3 inches apart.. Doesn't show these in the Audi diagram. Maybe some kind of flow control? I read another post and a guy said he bought that new hose from the dealer and it didn't have one either...???

  2. #2
    Veteran Member Four Rings
    Join Date
    Jun 23 2010
    AZ Member #
    60634
    Location
    Athens, PA

    It's supposed to shoot out the cap. It's how it counteracts the reservoir being overfilled. There's a little hole in the cap for that exact reason.

  3. #3
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    You are probably pulling air into the suction side of the P/S pump. Check the hose fittings between the reservoir and pump and make sure they are tight.

  4. #4
    Senior Member Three Rings
    Join Date
    Feb 22 2008
    AZ Member #
    25591
    My Garage
    03 A4 3.0 6MT
    Location
    The Meadows, NV


  5. #5
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    Quote Originally Posted by road_tripper View Post
    Nice link! Lots of detail on the problem.

  6. #6
    Veteran Member Four Rings rollerton's Avatar
    Join Date
    Sep 16 2010
    AZ Member #
    64156
    My Garage
    S6 Avant X TWO! and 67' Speed buggy
    Location
    Central Wash
    Items for Sale

    I've experienced a sort of similar problem- on a C5 A6 Avant O owned last year. When I got the car the owner had replaced the P.S. pump fairly recently. But it still had some intermittent groaning. After a month or so of ownership I did all the clamps etc and did a quick P.S. fluid refresh. Didn't help. Pretty soon I noticed the reservior seemed like it was leaking- replaced it. Same thing.
    I found that it had almost no power steering assist at idle, but it worked OK when the engien speed was up- but it would groan. Also, when I looked I saw the fluid didnt circulate at idle but would shoot out the reservoir when teh engine was rev'd = leak found.
    Removed the pump, it was *mint* . No slop, totally smooth.
    Bleeding/ flushign did nothing.
    Removed the pump again, tore it apart. I found a very VERY small hairline crack in the inside oval-shaped pump housing. I can't recall what that pump design terminology is- but it's confusing when you take it apart. I assume the crack was opening up under pressure- and that there was higher pressure in the rack end of the circuit than back to the reservior when the engine was rev'd. Causing the fluid to back up.
    Anyway, summary: when a similar thing happened to me I had a bad P.S. pump.
    foley803 : What does an electrical surge sound like? Barking dogs? Watermelons?

  7. #7
    Veteran Member Four Rings JEENYUS's Avatar
    Join Date
    Jul 28 2009
    AZ Member #
    45627
    My Garage
    2003 A4 3.0 V6
    Location
    SL,UT

    i'll tell you right now i had the same issue. i replaced the reservoir and it solved the issue. there was something that was not allowing it to get pulled into the system so the return line would shoot up the ps fluid due to the back pressure.
    Asses are where it's at. even fat chicks can have nice boobs. -MmmBoost

  8. #8
    Registered Member One Ring
    Join Date
    Apr 05 2012
    AZ Member #
    91280
    My Garage
    Gf's black A3
    Location
    CA

    Hey guys, thanks so much for ur responses. I'm gonna try to work on it tomorrow. I'll post back when I figure it out.. Seriously appreciate the help and advice.

  9. #9
    Registered Member One Ring
    Join Date
    Apr 05 2012
    AZ Member #
    91280
    My Garage
    Gf's black A3
    Location
    CA

    Thanks, but I know the cap has a hole for that reason.
    It seems to be pulling the fluid in ok, but it shoots it back into the resrevior with a high spattering and spitting, making it splash up everywhere. I guess I'm gonna study more diagrams on the power steering and rack, check all the lines the best I can, (I bought some screw clamps) and then I'll try to fill and bleed it one more time? Maybe I'm not bleeding it right?? I'm lost@%#! The pump, and power steering all seem to work perfect when filled w fluid, but it spits it out on the return to resrevior, making it spit air and fluid.. Maybe it's pulling in air somewhere after the pump? Everything is dry around the pump.. Does anyone think it is or isn't the pump? Any other ideas?



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