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Old 05-15-2019, 06:41 PM   #1
STI Fossy
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Member#: 349908
Join Date: Mar 2013
Default Need Help, Steering Noise Keeps Keeps Coming Back

2004 Forester XT
I replaced the power steering o-ring and it would stop squealing, but the next day it would squeal again and the o-ring was broken. Did this like 5 times and each time the problem would go away at first then come back the next day with a broken o-ring. Used OEM Subaru o-rings.

Replaced the power steering pump twice along with all the hoses, turned the wheel back and forth, etc. The steering was better and the squealing wasn't as bad. There was some air in the reservoir but not bad; fluid would slosh around but no bubbles.

Drove it around for 15-20 minutes and then all of a sudden it got bad again and the squealing got worst. Now there is bubbles in the reservoir again and the fluid is being pushed out of the reservoir.

There is no fluid leak under the car or around the wheel wells.

Anybody have any idea what is causing it to keep going out? I've replaced almost everything on the power steering.
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Old 05-15-2019, 06:53 PM   #2
Blktrax
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Chapter/Region: South East
Location: West, NC
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2002 WRX 223K Mi.

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You need a rack, a reservoir , or both.

The reservoir , the fluid tank has a screen filter in the bottom.

Had a similar issue on a non turbo Forester recently, basically the spool valve in the rack was sticking. It had assist but it was sticking and causing the fluid to cavitate in the pump. A vacuum was pulled in the system , would work fine for 5 minutes or so then it would look like a foaming volcano out the fluid fill.
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Old 05-15-2019, 08:30 PM   #3
STI Fossy
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How do I test the reservoir? Iíve emptied it and I donít see anything obvious. No cracks and filter is clean.
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Old 05-15-2019, 08:32 PM   #4
STI Fossy
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Can I rebuild the rack or do I need to get a new one? How much does that usually cost? Iíve already spent a good bit on replacing everything already.
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Old 05-15-2019, 09:14 PM   #5
Blktrax
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2002 WRX 223K Mi.

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15yr old car problems.

As stated everything else but those 2 items were replaced. Depending how and if the vehicle is still being driven with air in the pump, that may need to be replaced again as well.

If the elbow going into the pump is plastic you should replace it as well, if itís aluminum, and you said the o-ring was split , there may be burrs of metal in the pump housing

Last edited by Blktrax; 05-15-2019 at 09:34 PM.
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Old 05-15-2019, 10:55 PM   #6
STI Fossy
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I havenít driven it much since the new pump. Just from the shop back to the house. Then around the neighborhood after replacing all the hoses. It has the aluminum elbow. The broken o-rings were before the pump was replaced.

Last edited by STI Fossy; 05-15-2019 at 11:04 PM.
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Old 05-16-2019, 06:53 AM   #7
Blktrax
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2002 WRX 223K Mi.

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The only places the system is under suction , is from the tank to the pump. If that hose and o-ring were replaced Itís not likely itís pulling air into the system ; unless the pump has a bad seal. But since the pump was replaced twice , and the hoses were replaced that pretty much limits the problem to the rack. The tank and filter are pretty much insurance on the new pump and rack.
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Old 05-16-2019, 10:53 PM   #8
STI Fossy
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I was afraid of that; was hoping there might be something simple I missed. Wasn't looking forward to spending more on a rack. Guess I'll go order a new rack then.
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