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-   -   Power steering o-ring fix (http://legacygt.com/forums/showthread.php?t=197481)

yokotaalum 12-04-2012 07:27 PM

Power steering o-ring fix
 
Last winter I started having some problems with the power steering system on my 05 GT. My symptoms included noise from the power steering pump, bubbles in the power steering reservoir (which usually resulted in overflowing fluid out of the reservoir), and intermittent power steering loss in cold weather when the car was first started. When the car would warm up, the problem would go away as the power steering system bled the air out of the system.

I was able to track the problem down to the o-ring on the feed fitting on the top of the power steering pump. When cold, the o-ring would shrink and let air into the system. When the engine warmed and the o-ring expanded, the air leak would close and the system would return to normal eventually.

I tried replacing the o-ring with something off the shelf and while it did help a little, over time last winter the problem started to return, though not as bad. I knew this was related to the o-ring material not being correct for power steering fluid, but my Subaru dealer said they were unable to order just the o-ring by itself.

Fast forward to this year and I figured I'd try again while I was picking up valve cover gaskets from the dealer. Amazingly, the parts counter guy was able to get me a part number and order the o-ring. Put it in this weekend and this morning with temps in the 30s, I had no issues with my power steering.

It's a cheap easy fix if you have the same symptoms I did.

Subaru part number is 34439FG000.

Hopefully this helps someone else.

PeterJMC 12-05-2012 01:45 PM

Good job! Sounds like symptoms and fix that could affect any vehicle. My buddy had this same exact problem with his '06 Accord and fixed it the same way, by replacing O-ring.

_karu_ 03-19-2013 08:49 PM

How do we replace the o-ring? Is this something that can be done without bleeding the system?

chato 03-20-2013 06:21 PM

I didn't drain mine. one bolt holds the hose to the top of the pump. just take out the bolt, then quickly lift the hose above the level of the fluid reservoir and you shouldn't lose too much fluid.

MNRZR 03-21-2013 09:52 AM

Quote:

Originally Posted by chato (Post 4351285)
I didn't drain mine. one bolt holds the hose to the top of the pump. just take out the bolt, then quickly lift the hose above the level of the fluid reservoir and you shouldn't lose too much fluid.

X2

No need to bleed if done this way.

_karu_ 03-21-2013 10:08 AM

Thanks, guys! I think I'm going to do this right before I do the P/S flush.

I went to the dealer last night and checked out the new Legacy sitting inside the dealer floor. I noticed the level of the reservoir for P/S is at "Max Cold." Meanwhile, my car's P/S reservoir is at "Min Cold" in the morning. So, perhaps it's been seeping out of the P/S pump due to the o-ring issue. I do notice oil dampness around the pump.

I might want to take a picture of the reservoir with the brand new fluid on it. Mine is actually really dark...

mrjk77 04-21-2013 02:02 PM

anyone have a pic of this o ring fix? :)

Charged 04-21-2013 06:18 PM

Quote:

Originally Posted by mrjk77 (Post 4399276)
anyone have a pic of this o ring fix? :)

I just did it the other day. No pics, but it's simple. Find the power steering pump. Directly on top is a hose with a 90deg composite fitting. One bolt is holding it down. Undo the bolt and pull the fitting straight up. Some fluid will come out, but just quickly just raise the hose up above the reservoir and seal it with your thumb. Sometimes the O-ring will be on the fitting or you may have to fish it out of the pump. Replace O-ring, re-install fitting, and top off fluid if necessary.

If you're going to go that far you might consider flushing the power steering system. There is a post in the Walkthrough section detailing how to do it. It's not that much harder.

Part# 34439FG000 was ~$2 at the dealer.

mrjk77 04-21-2013 09:36 PM

Quote:

Originally Posted by Charged (Post 4399520)
I just did it the other day. No pics, but it's simple. Find the power steering pump. Directly on top is a hose with a 90deg composite fitting. One bolt is holding it down. Undo the bolt and pull the fitting straight up. Some fluid will come out, but just quickly just raise the hose up above the reservoir and seal it with your thumb. Sometimes the O-ring will be on the fitting or you may have to fish it out of the pump. Replace O-ring, re-install fitting, and top off fluid if necessary.

If you're going to go that far you might consider flushing the power steering system. There is a post in the Walkthrough section detailing how to do it. It's not that much harder.

Part# 34439FG000 was ~$2 at the dealer.

thanks. i'll give it a whirl. yeah i saw it's like 1.40 at fredbeans, but i'll just call a local dealership. :spin:

subby 11-16-2013 10:34 PM

thanks I think I have the same problem

HarryD 11-18-2013 10:06 AM

I very much appreciate this information and especially having the
O-Ring part number handy.
Could I break into this discussion briefly so I don't have to start a new thread?
What are you all using for power steering fluid? OEM Subaru?
I see in the FSM that Dextron III (ATF?) is equivalent. Does anyone use this, and if so, is it a clear fluid like the OEM?

ragman 11-18-2013 11:03 AM

My understanding is that you are supposed to use Subaru ATF fluid in the Power Steering. That fluid is red, not clear.

DOHCstunr 11-18-2013 11:20 AM

For $2 I'll give it a shot.
My symptoms are identical to the OP. Zero issues Last year, just a small fluid leak. Winter comes, starts acting up. Make it through the winter, no issues all spring, all summer.

First startup on a cold day a few weeks ago... issues come back.

I've never seen anything dextron based that wasn't red. This includes coolant and p/s fluid.

outahere 11-18-2013 11:26 AM

Quote:

Originally Posted by HarryD (Post 4644619)
……..I see in the FSM that Dextron III (ATF?) is equivalent. Does anyone use this, and if so, is it a clear fluid like the OEM?

I used to use DexIII, but it is longer available on store shelves, from what I have seen. I now use DexVI, which is backwards compatible with DexIII. It is a red tinted liquid.

HarryD 11-19-2013 08:04 AM

Thanks for answering my slightly off topic question.
I like that the OEM fluid starts out clear and darkens as it gets
contaminated, so I will probably pick some up from the dealer.


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