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Old 06-10-2010, 10:55 AM   #51
SLIC VIC
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GREAT write up.

i had my 06 STi in the shop replacing my cracked plastic motor mounts with Group N's as well as new brake pads... About two days after i got the car back my power steering was whining like hell when the car was running, and even louder when i turned the wheel. Went to PEP BOYS and they had a pack of 10 green O Rings for $43 but the lady felt bad, took me out back and gave me 1 for free . Replaced the O ring and the noise was gone with the engine running but still whines a little when turning the wheel to the right, still bubbles in my reservoir which should explain the whining noise still there so im gonna try replacing the fluid.

Quote:
Originally Posted by hwy61 View Post
My old O ring was taller than thick and did not exactly have a round cross section either. An exact replacement isn't necessary.
Quote:
Originally Posted by danimal5737 View Post
My O ring was actual flat rather than full O ring, and looked designed that way.
The factory black O ring seems to harden up and become very delicate as it forms in a flat shape rather than round, this seems to be the problem with alot of PS noise. Glad i got the fix done literally for free
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Old 06-10-2010, 08:23 PM   #52
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does replacing this o ring involve draining or flushing the fluid as well?
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Old 06-11-2010, 05:40 PM   #53
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anyone?
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Old 06-11-2010, 08:30 PM   #54
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Quote:
Originally Posted by scoobymuff View Post
does replacing this o ring involve draining or flushing the fluid as well?
No. Just replace the O-ring and bleed the system. It took 15 minutes of turning the steering wheel back and forth to get the bubbles out of my system.
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Old 06-11-2010, 09:28 PM   #55
Eric.H
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ugh! so i was finally doing this, flush the line, about to put the bolt from the steering pump back and that thing stripped! AAH!!!!

anyone one knows part number of this bolt? i went to napa, but i came in too late (closed).

EDIT: never mind. how noob of me. is a 10mm bolt lol
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Old 06-12-2010, 07:50 PM   #56
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update!

I couldn't find the exact O ring, but it looks like a fit. still have the problem.

whining steering, hard/jerky steering. it may be cause of the new o ring. Gonna give subaru a call monday for an oem o ring and tensioner bolt. again, gong to flush the line.
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Old 06-12-2010, 08:25 PM   #57
dantastic
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Quote:
Originally Posted by Eric.H View Post
update!

I couldn't find the exact O ring, but it looks like a fit. still have the problem.

whining steering, hard/jerky steering. it may be cause of the new o ring. Gonna give subaru a call monday for an oem o ring and tensioner bolt. again, gong to flush the line.
how long did you spend bleeding it? it took me a good long while to get all the air out.
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Old 06-12-2010, 08:28 PM   #58
Eric.H
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^how would i know if the whole air is out? ugh!

as soon i pour some of that lucas stop steering leak, it began to be bad again.
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Old 06-12-2010, 08:39 PM   #59
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you have to keep bleeding (turning the steering wheel back and forth, lock to lock, with the engine ON and front wheels off the ground) until there are no more bubbles in the reservoir. it took me at least 15 min of me cranking the wheel and my brother looking for bubbles under the hood.
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Old 06-12-2010, 09:08 PM   #60
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I'm just going to bleed everything off, replace it with new fluid. which fluid do you recommend? puente hills subaru is closed
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Old 06-14-2010, 09:39 PM   #61
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Been looking around on the boards. I've been having some power steering issues all of a sudden. My power steering just stopped. No pre-warning signs or anything.

I checked the usual. Belt is fairly new, and in good condition, replaced maybe bout a year or more so ago, no bubbles in the fluid, no whining noises or vibrations from the pump. Sounds normal.

From what I've been searching, everyone says replace hose clamps, replace o-ring, then bleed. All with the exception of bubbles being present. If no bubbles present, could this still be my problem.

Any ideas?

Thanks
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Old 06-16-2010, 02:20 PM   #62
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Thanks for the write-up! Had problems with my P/S the last few days. Replaced the O-ring and topped off the fluid. Runs perfectly now!
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Old 06-17-2010, 02:53 AM   #63
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are all o-rings the same. ive got some paintball o-rings laying around and was wondering if they would be ok to use?
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Old 06-17-2010, 03:00 AM   #64
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Where are you guys buying your O rings? I use one that it can stretch out, but I am still having bubbles/hard-jerky steering, steering pump whining.

Maybe I am doing this all wrong
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Old 06-17-2010, 09:31 AM   #65
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I picked up my o-ring from Advance Auto. The guy there let me do a test fit for different ones. The P/S had a loud whine and it felt like the steering was fighting me prior to changing the o-ring out. The bubbles didn't go away after my initial bleed. I drove it around a little bit and had to bleed it a few more times. By the end of the day it was running great again.
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Old 06-17-2010, 04:31 PM   #66
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O-rings are O-rings for any given size. Check out your local hydralic supply house. The will probably let you test fit a few.
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Old 06-21-2010, 08:56 PM   #67
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MAJOR UPDATE!:

so i went on to try a different O-rings and now my steering wheel is back to normal! well, at first it was still sort of whinning/hard steering. so today i went to pop the hood and nothice there was hardly any fluid and no bubbles... so i pour some more and BAM! it was working again.

O-rings plays a big role. choose the right one. looks like the size that the op is using, is the one to go for. I, use a different size, but it fitted and fix the problem. hope this helped.
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Old 06-23-2010, 11:39 AM   #68
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I'm hoping this works cause I'm about to surrender to the dealer....
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Old 06-23-2010, 02:38 PM   #69
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OK the oring helped, no more whine and bubbles but i still get a little bit of chatter. gonna give it a couple more days to see to it'll fix itself....
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Old 06-23-2010, 05:43 PM   #70
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hwy61 you sur are the man.....
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Old 08-02-2010, 08:50 PM   #71
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Does anyone one know the size and type of tube connects the reservoir to the power steering pump?
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Old 08-30-2010, 12:21 AM   #72
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just wanted to report: I had the same symptoms and tried replacing the belt and fluid but didnt work and came across this thread. I went to check the condition of the old o-ring and there wasnt one even there ... So i put a o-ring on that i got from a variety pack from pep boys for 2 bucks and so far so good, ill report back after the morning start up, thats normally the worst.
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Old 08-30-2010, 09:18 PM   #73
scoobymuff
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yup the whine is gone! Thank you o -ring!
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Old 09-22-2010, 04:53 PM   #74
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Quote:
Originally Posted by hojman View Post
are all o-rings the same. ive got some paintball o-rings laying around and was wondering if they would be ok to use?
probably not, only because i stopped at a paintball store on the way home and asked em and they said that the oring manufacturers for paintball say never use petrol based grease cause it damages the orings.

also, i got the metric kit because out of the 177orings in the dang autozone kit theres no 11mm. i tried the one that looks to be the same size and no dice, used a size smaller and when i took it back off the oring was cut up, but all the pieces were still there thank goodness.

update: grr. got the right size and still no go. must be the pump.

Last edited by wrxkyle; 09-22-2010 at 06:50 PM.
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Old 10-05-2010, 01:13 PM   #75
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HUGS that was a lot of help.
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