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Old 12-04-2010, 06:43 PM   #101
Surf WRaX
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Quote:
Originally Posted by ryanx View Post
Well for my car the air intake piping is in the way of the inlet nozzle and it's impossible to reach the bolt as far as I can tell
I'm running into this problem to on my '02 which has a differently situation PS Pump. I can't get to the 10mm bolt to get to the O-Ring because the air intake piping is in the way. If I can pull out the unit that is below the air intake, I might be able to get to it. I don't know what it is though. It is the thing in this image, where you see the connector above the word "clamps" and below the air intake. I would just have to remove 2 10mm bolts and pull this unit out, then I could get to the 10mm bolt for the PS inlet. Any thoughts?

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Old 12-05-2010, 09:27 PM   #102
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I feel a little like I'm crashing a party I wasn't invited to but I've read this whole, year long thread and thanks to all who are taking time to post the info.
I'm havnig a similar problem with my 2000 Subaru Outback.
The PS pump intake is similar but actually has 2 O-rings. I've replaced one with one from an auto parts store that wasn't a perfect fit but I'd like to replace both with one that fits better. Some folks here are talking about using O-rings from Lowes. Is that acceptable? I'm a carpenter and go to Lowes all the time but I'm not sure their o-rings are suitable for hydraulic fluid. Does anyone know for sure? I've not found a match at the 3 auto parts stores I've tried so far.

Also, the o-rings on my ps pump are flat. They're so evenly flat that it looks like they were made that way. Does that seem likely?

I've called two subaru dealers and both had trouble looking up the o-rings and each ended up giving me a different part #

For those who are bleeding their system, I'd read on a Subaru board somewhere the idea of disconnecting the belt and turning the pulley by hand to run fluid thru the system. Might be easier as a one person operation.
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Old 12-05-2010, 09:31 PM   #103
Eric.H
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O-rings are o-rings as long as it fits you're fine. Trust me I went throught this too! It doesn't have to be oem fit. Get one that is somewhat thick and securely fits.
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Old 12-06-2010, 12:17 AM   #104
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Actually some O-Rings don't work well with hyrdocarbons such as gas and oil. Most all stock black O-rings you find for sale are "Buna-N" (Nitrile) or Viton. Both of those are fine. Most white or clear o-rings are made of silicone or EPDM and those are not good with Dexron ATF. Just about any black O-Ring you find that doesn't say what material it is on the package can be assumed to be Buna-N and therefore OK.

Here is a good page for O-Ring compatabilty. This is also where I buy most of my stock O-Rings from: http://www.mcmaster.com/param/html//...comparison.htm
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Old 12-06-2010, 03:09 AM   #105
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Quote:
Originally Posted by Surf WRaX View Post
I'm running into this problem to on my '02 which has a differently situation PS Pump. I can't get to the 10mm bolt to get to the O-Ring because the air intake piping is in the way. If I can pull out the unit that is below the air intake, I might be able to get to it. I don't know what it is though. It is the thing in this image, where you see the connector above the word "clamps" and below the air intake. I would just have to remove 2 10mm bolts and pull this unit out, then I could get to the 10mm bolt for the PS inlet. Any thoughts?

If your pump is anything like mine (02) as well, you will need to take out the entire pump to access all the inlets. Yes that means removing the alternator, removing the pump bracket and take out various hoses along the way. I didn't want to do it again just to check the o rings so i ended up letting the dealership handle it.
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Old 12-06-2010, 06:06 AM   #106
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Quote:
Originally Posted by Surf WRaX View Post
Actually some O-Rings don't work well with hyrdocarbons such as gas and oil. Most all stock black O-rings you find for sale are "Buna-N" (Nitrile) or Viton. Both of those are fine. Most white or clear o-rings are made of silicone or EPDM and those are not good with Dexron ATF. Just about any black O-Ring you find that doesn't say what material it is on the package can be assumed to be Buna-N and therefore OK.

Here is a good page for O-Ring compatabilty. This is also where I buy most of my stock O-Rings from: http://www.mcmaster.com/param/html//...comparison.htm
Good info.
Thanks.
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Old 12-07-2010, 08:37 PM   #107
rubinm
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IMPORTANT:

the 11x16x2.5 O-ring is NOT the correct size O-ring.

thru trial and error, i have tested about 10 different rings, and found that a 10mm x 14mm x 2mm IS a correct size.


the larger size might seal for a day or two (as it did in my case) but it will soon fail on you because it is too large, and gets pinched by the fitting.

also, if you've only replaced the 4 clamps on the Reservoir suction and return line, you've missed 4 others that could be leaking. 2 on the bottom of the rack, and two more on the hardline that runs to the rack.

lots of more trouble shooting info on my thread here:

http://forums.nasioc.com/forums/show...=powersteering


cheers,

Milo
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Old 12-14-2010, 10:11 AM   #108
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http://www.iwsti.com/forums/gd-suspe...failing-4.html

Updated.

Short version: I pulled the power steering pump out; cleaned it up; then removed, Teflon taped, replaced the o-ring, and reseated the temperature sensor. Then I put the whole thing back together and back into the car. Primed the pump, worked out bubbles, and started the car. Everything looked great.

But then I went to dinner (in another car). When I got back, there was ATF sitting on top of the pump. Also, fluid on the metal beneath. So the pump is clearly leaking. :-(

Its 30-f!cking degrees outside (Florida, nonetheless) so this project is getting shelved for a few days. But the next step is to remove and begin dismantling the pump to see about replacing a gasket somewhere, hopefully.
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Old 12-14-2010, 05:25 PM   #109
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Just for anyone's information, the black O-rings sold at Lowes are made by Danco (a plumbing supply co)
I emailed Danco asking what material the rings were made of and they told me Buna-N (Nitrile).
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Old 12-14-2010, 06:54 PM   #110
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Quote:
Originally Posted by hwy61 View Post
I installed the axle with new boots and grease. $84 from Subaru. That went easy enough. I had dropped the top of the bottom ball joint so no realignment will be needed. Everything worked fine on the drive home...15 miles. Talked to the Subaru mechanic while I was picking up the boots. They didn't have an "O" ring for the pump anyway. Parts guy who is a hot rodder too says they don't sell rebuild kits for master cylinders or power steering.....too much liability he said. Never thought of that but that might make it harder and harder to obtain rebuild stuff. They only sell new....for this reason.

Anyway, new fluid, hoses tightened where they were leaking at the reservoir and the O ring under the inlet nozzle replaced which was the problem. Everything was smooth and quite on the ride home. Thanks again to STIckySTIfee for the tip that led me to the fix. Hwy61
i know this is an old thread. however subaru may not sell o-rings.........but parts stores have PLENTY of o-rings. take that 90* inlet off the top of the pump and walk into the parts store and find what you need. or home depot, lowes, yadda yadda.

subaru doesnt sell o-rings for a/c lines......like hell i was going to pay $$ for my high pressure line off of the compressor, i pulled out our o-ring kit and found exactly what i needed.

Quote:
Originally Posted by JohnCharleston View Post
Just for anyone's information, the black O-rings sold at Lowes are made by Danco (a plumbing supply co)
I emailed Danco asking what material the rings were made of and they told me Buna-N (Nitrile).
me= fail for not reading entire threads before i post. anywho, nitrile will hold up to ATF perfectly, smear some vasoline on it before you put it on so it doesnt pinch and rip.
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Old 12-15-2010, 03:38 PM   #111
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Subaru doesnt sell the o-rings - which has been covered many times,

but ACE, and many many other places have them

The correct o-ring for the top of the PS pump is 10mm x 14mm x 2mm
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Old 12-16-2010, 05:10 PM   #112
cofattire
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Can anyone tell me anything about the o rings on the banjo bolt? Are there supposed to be two?
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Old 12-17-2010, 05:48 PM   #113
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^ The o-ring on the banjo is a copper-metal type setup. its acutally one piece, but it seals both the top and bottom of the hardline which the Banjo goes thru.

If yours is leaking from that point, i would try snugging up the banjo, be careful not to over torque it. Dont know the torque specs off the top of my head, but dont gorilla a Banjo bolt, never a good idea.

That part may be available from the dealer, that i am not sure of, i havent had to replace mine.


Cheers,

Milo
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Old 12-17-2010, 06:06 PM   #114
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Thanks Milo!
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Old 12-19-2010, 05:18 PM   #115
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Quote:
Originally Posted by rubinm View Post
^ The o-ring on the banjo is a copper-metal type setup. its acutally one piece, but it seals both the top and bottom of the hardline which the Banjo goes thru.
This is accurate, and that part is available CHEAP from the dealership.

On another note, I removed my power steering pump this weekend and did a how-to with PICS.

http://www.iwsti.com/forums/how-inst...sassembly.html
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Old 12-20-2010, 01:39 AM   #116
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Nice writeup Maxxell. I may go down that road. For O-Rings you can get most anything you need from McMaster Carr, you'll have to order about 50 of them for about ten bucks. Another good place is O Rings West, but they have a pretty high minimum buy. If you are looking for metric, 1.5mm is pretty close to 1/16", so you could look in those sizes. When I try to measure an ORing that big, I put it on a piece of graph paper and try to make it a perfect circle to see what it's OD is. That plus the thickness should be all you need.
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Old 01-13-2011, 06:24 PM   #117
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I am having a simmilar problem with my 2004. Its started a couple of weeks ago when it started droping down into th 20s at night. The steerring is kind of jerky and whines when the wheel is applied all the way to the right or the left.
I popped the hood and noticed power steering fluid leaked onto the engine block under the pump. There was also the smell of something burning off the block.
The problem has gotten worse. My dealership suggested I replace the pump and all the hoses which could be a fortune just for me to get the parts. Is there something I should start to possibly fix this problem more cheaply.
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Old 01-14-2011, 01:23 PM   #118
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Quote:
Originally Posted by supertek75 View Post
WRX8XB, do you have the part numbers for the hoses? I'm planning on doing all the work as well (change the clamps, o-ring, and possibly the hoses). By the way, is there a recommended fluid?
Pressure hose: 34610-ff121
suction hose:34611-fe130
return hose:34611 -f050
hope this helps
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Old 01-16-2011, 08:47 PM   #119
Dan707
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Thumbs up Great share

Hwy61 & others thanks alot for sharing, this has help me alot on my 05 STi.

Dan
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Old 01-18-2011, 01:53 AM   #120
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Alright, so I read this thread and some others, but I have one issue. The hose clamp that, I think, was letting air into the system was one of the lower clamps, the ones underneath the rack. Well, I replaced both of those clamps, but the issue I have is how to get the old ones off. I tried sliding the hose over to pull it all the way off and I couldn't get it off. So what I did, for now anyway, is slide the old clamps towards the middle of the hose. Will this work or will it harm the hose? If they have to come off, then how do you get those clamps off?

Andrew
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Old 01-18-2011, 07:04 AM   #121
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Quote:
Originally Posted by FNHP35 View Post
Alright, so I read this thread and some others, but I have one issue. The hose clamp that, I think, was letting air into the system was one of the lower clamps, the ones underneath the rack. Well, I replaced both of those clamps, but the issue I have is how to get the old ones off. I tried sliding the hose over to pull it all the way off and I couldn't get it off. So what I did, for now anyway, is slide the old clamps towards the middle of the hose. Will this work or will it harm the hose? If they have to come off, then how do you get those clamps off?

Andrew
I just slid mine down to avoid having to remove and replace the hoses, otherwise you'll have to pull the hoses off, bend the old clamps off or cut the old clamps off... as far as I can tell.
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Old 01-21-2011, 06:08 PM   #122
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Hey guys, this thread has been extremely helpful in curing my power steering whine.

When I removed the reservoir, I noticed ATF had been leaking from the bottom. I replaced both soft lines, the 4 associated 4 clamps, and the o-ring in the pump. I also discovered the part number for the o-ring also. Subaru part #34439AE020. This ring, after a few frustrating attempts, did seat properly in the pump. The old o-ring that came out was flattened and very brittle. Anyway, my power steering feels as good as new! I hope this helps

Matt
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Old 01-27-2011, 02:24 AM   #123
STINM43
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I am really needing some help in finding an o-ring that will fit a 2006 sti, I have tried many different sizes with no luck including Subaru part #s 34439FE000 and 34439AE020.

Has anyone had any luck finding an o-ring that works in a 2006-07 sti? If so please help..
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Old 01-29-2011, 10:41 AM   #124
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I am extremely glad I found this thread. I have been noticing my steering wheel vibrating pretty violently when taking low speed corners and when turning it back and forth while the car is sitting still. I was starting to wonder what it could be, Looks like I'm off to the autoparts store for a new O-ring. Thanks again. I'll report back if it works.
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Old 01-29-2011, 11:20 AM   #125
devildog12390
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Has anyone had any issues with the pre-fab'd p/s lines? I got mine installed and when I'm at an idle I can hear a loud humming sound. No air in my lines and it stops when I turn my steering wheel. It's really just annoying...
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