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Old 02-23-2011, 03:48 PM   #26
Homemade WRX
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Quote:
Originally Posted by 68Cadillac View Post
To completely rebuild this guy you'll need the following*.
1 - AS568A Dash Number 037 O-Ring
1 - AS568A Dash Number 136 Square Cross Section O-Ring(or maybe 033 square or, 033 round or, 136 round)
1 - AS568A Dash Number 021 O-Ring
1 - AS568A Dash Number 015 O-Ring
3 - AS568A Dash Number 014 O-Rings
1 - AS568A Dash Number 013 O-Ring
? - Mystery size O-Ring*.
1 - Bearing (see above posts)

*I never did open up the portion of the pump with the the Hex Key. I'm sure there's an o-ring (or more) under there but I didn't get the size.

PM if you get any updates.
So is this the final parts list?...ALL the proper o-rings?

I have an STi pump and 02 wrx pump, so I can check fitment as it is suspected that the pumps have differences.
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Old 02-23-2011, 04:29 PM   #27
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Originally Posted by Homemade WRX View Post
So is this the final parts list?...ALL the proper o-rings?

I have an STi pump and 02 wrx pump, so I can check fitment as it is suspected that the pumps have differences.
Near as I could tell. You still have mystery o-ring and the bearing to figure out.
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Old 02-23-2011, 07:07 PM   #28
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I'm game!
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Old 02-26-2011, 01:34 PM   #29
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Is there any fix for the compression part of the pump or is that rebuild/ replacement time?
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Old 03-01-2011, 09:38 PM   #30
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I'm going to try to service my PS pump in the coming weeks. There is a slow drip coming from the halves of the PS pump. It's not anything major like having to top off the fluid reservoir every week or even month, but the leak gets annoying after it has dripped down the timing belt cover and onto the oil filter.

I've been driving it for about a year now and for the past months noticed the leak. I replaced the notorious O-ring at the top of the pump already with the -014 size and after cleaning the pump, the leak still came out of the halves of the pump.

I'm thinking I'll only need the -014, -015 and -037 for this repair?
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Old 03-12-2011, 01:33 PM   #31
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Just finished the p/s pump rebuild last night, I changed all the O rings and gave it a good cleaning. I re-installed and bleed all the air out of the system. BUT I can't get rid of the steering wheel shudder, I went through the proccess to remove all air 3 times last night, and just finished doing it twice today too. Still I have steering wheel shudders when turning. Anyone else experience this after rebuild? I am thinking that maybe the Dash-37 was not thick enough, but I would think if thats the case I would see air bubbles still in the reservoir. My pump had no issues before rebuild other than a leak cause by a warn out O ring. I think I may pull pump off again and replace the new O rings with the originals that aren't broken. Any advice is welcome and appreciated.
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Old 03-14-2011, 03:47 PM   #32
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I re-installed and bleed all the air out of the system. BUT I can't get rid of the steering wheel shudder, I went through the proccess to remove all air 3 times last night, and just finished doing it twice today too. Still I have steering wheel shudders when turning.
After my rebuild I foamed up the fluid bad. It took me about 3 weeks to work out all the air (stop the shuddering). I just kept parking the car with the wheels at full lock left or full lock right and dead center every time I parked. I must have churned up the fluid bad because I had what looked like microbubbles in the fluid. Eventually it worked it self out.

My shoulders look bigger now. YMMV.
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Old 03-26-2011, 12:53 PM   #33
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Does anyone know if the o-rings stated above will work for an 02 wrx ps pump as well?
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Old 03-28-2011, 09:19 PM   #34
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Dont quote me but yes I beleive they would...
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Old 04-02-2011, 04:19 PM   #35
gearhead15
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These probably are not as high quality gaskets as your using, but they claim that the kits are complete.

http://www.pskits.com/catalog/-c-61_93.html

I'm going to order one soon for my SVX, I will let you know how that turns out.

-Josh
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Old 04-05-2011, 12:17 PM   #36
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Thumbs up a very useful thread -- thanks!

I bought the FEP o-rings at McMaster-Carr also, and now my power steering pump is working fine. The leak on my pump was at the larger of the two back shell o-rings. I had some trouble reassembling the shell, and damaged the large o-ring (pinched). So for you folks that are not expert at this type of thing, be careful not to tighten the shell bolts unless the two pieces fit flush (like they fit with the original o-ring).
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Old 04-06-2011, 05:50 PM   #37
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Quote:
Originally Posted by rlucy18 View Post
Thanks for the Tip Rambler323 Just Ordered from the O Ring Store.com

1 x 037 HNBR70 Green O rings = $1.28
1 x 021 HNBR70 Green O rings = $0.52
1 x 015 HNBR70 Green O rings = $0.32
1 x 014 HNBR70 Green O rings = $0.32
1 x 013 HNBR70 Green O rings = $0.32
1 x 136 HNBR70 Green O rings = $1.36

Plus $5 shipping
Ordering Now. Sounds MUCH cheaper than buying a new/used PS Pump. Wish me luck : ) Appreciate the thread, wouldn't even attempt this project without it. Huge help man!
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Old 04-08-2011, 09:20 PM   #38
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Huge help man!
You're welcome.
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Old 04-20-2011, 08:39 AM   #39
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Quote:
Originally Posted by iceberg113 View Post
Ordering Now. Sounds MUCH cheaper than buying a new/used PS Pump. Wish me luck : ) Appreciate the thread, wouldn't even attempt this project without it. Huge help man!
any updates mate? does the HNBR o-rings works?
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Old 04-20-2011, 06:38 PM   #40
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I swapped out my leaking o rings(the two "main " ones when you open the back up)

no leaking but my steering is terrrible even after a good amt of bleeding.
i have another thread going on in here with next to no help.

thinking my pump may be toast.... what would cause the pump to have reduced output?

bearing? that spring? i may just pick up a used pump to get the car back to 100%...but ill still want to rebuild my original.
so strange since it work just fine before hand. i only took it off to fix the leak.
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Old 04-22-2011, 10:57 AM   #41
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Originally Posted by cracky View Post
thinking my pump may be toast.... what would cause the pump to have reduced output?
One thing it might be: the o-rings deeper in the pump (the ones toward the front of the pump past the vanes and rotor are what separate the low pressure side from the high pressure side. They may have toasted themselves.


Last edited by 68Cadillac; 01-23-2014 at 07:21 PM. Reason: rehosted images
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Old 04-22-2011, 08:35 PM   #42
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i just place the order from theoringstore.com.
its cheaper to get this then buying used ps pump.
will see if this fix the leaking issue...
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Old 04-23-2011, 02:35 PM   #43
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Quote:
Originally Posted by 68Cadillac View Post
One thing it might be: the o-rings deeper in the pump (the ones toward the front of the pump past the vanes and rotor are what separate the low pressure side from the high pressure side. They may have toasted themselves.

thanks for that!

I wouldnt be surprised. Wish I wouldve clued into that before hand. Nothing like pulling the pump a million times. lol .

Maybe ill take it apart and replace all the orings.
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Old 04-27-2011, 12:44 AM   #44
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it's a good idea. i saw the mess my power steering pump made when i did my timing belt change. after the rebuild i still had a leak, but luckily it seems to have been the same problem as 68Cadillac, that banjo bolt wasn't tightened down enough. i have to replace my power steering pump hoses, since they're pretty solid now. only minus was that i had to special order them at my dealer.



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Old 04-27-2011, 04:04 PM   #45
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Im still debating to rip apart the pump and replace the orings that I didnt replace. or to just source a used one. hrmm..
this inconsistent and weak steering is annoying...

Last edited by cracky; 04-27-2011 at 04:09 PM.
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Old 04-27-2011, 04:53 PM   #46
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I ordered 5 of each o-ring in this thread and rebuilt my pump. I also replaced the stock crush washer (if that's what you want to call it). I cleaned the entire inside and outside of the pump with parts cleaner and blew it out with compressed air. I also replaced all the stock hoses with more OEM hoses and t-bolt clamps.

After I rebuilt it I bolted it up tight and put it back in the car and cleared all the air out of the system. I've got 200 miles on it and no leaks, bubbling or squealing and I'm sitting on 105K miles...



I am going to help another local STi owner fix his pump next week. Thanks to all that posted their experiences and fixes!!!
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Old 04-27-2011, 07:13 PM   #47
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Anyone know where is the best place to pick up the bearings for the pump?
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Old 04-27-2011, 10:58 PM   #48
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ok i have my pump apart right now.

that square shaped oring inside the pump...hrmm. i dunno what it specs. looks like the square cut you suggest...but it could just be a regular oring thats been squished over time. tough to say.

i found a bearing that matched the inside andoutside diameters at the store(by chance since they didnt stock much).
wasnt sure of the depth.. i got the one they had and luckily it matches up.

depth of the bearing is 12mm.

so its a 40x17x12

my old one is a bit noisy. figured ill replace it since im in here.
theres also another seal behind the bearing.... its like a cam seal(or diff seal) its not just an oring. i dont have specs. mine looks to be ok and i had no leaks though im hesitant to rush it back together. its ID is 20mm and OD is about 32mm.
Id have to pull it out and take it to the store to find a replacement.

also not sure if i want to run a round cut oring where that square one came out...

Last edited by cracky; 04-27-2011 at 11:32 PM.
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Old 04-27-2011, 11:50 PM   #49
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also just took out the little "plunger" thing from behind the hex bolt. i have a pic.

its a shaft with a spring and ball bearing in it. no seals on it. just press fit in.

the hex bolt ID for the oring is 17mm.
thickness looks somewhat the same as the other small ones.(about 2mm)

If we are talking metric here(which is ideally the proper size, though the other approximations will work).
Some of these are from another thread.(which apparently have been confirmed)

1 - 2x64x68 (or 2x65x69)
1 - AS568A Dash Number 136 Square Cross Section O-Ring(or maybe 033 square or, 033 round or, 136 round)- unsure (though I think a 2.5x50x55 would work..square or round I cant confirm I one that fits but is 3mm and it just seems a tad big)
1 - 2x24x28
1 - 2x14x18(or 2x13x17)
3 - 2x12x16
1- 2x11x15
1- 2x17x21
1 - Bearing 12x17x40
1- oil seal full dimensions/specs unknown (though measured roughly ID 20mm and OD is about 32mm.)

those or measurements is if you want the play on the inside or outside. probably doesnt matter which one you use)


9 orings total.

Last edited by cracky; 04-28-2011 at 06:21 AM.
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Old 04-28-2011, 02:11 AM   #50
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Here are some pics(sorry cell phone)






Here is whats behind the hex bolt. I pulled it out because I wanted to give this thing a good cleaning. Its a spring and ball bearing inside that shaft.




And here is the oil seal(looks exactly like a cam seal to me). No idea on specs at this point. Hopefully tomorrow I can figure it out.





EDIT: Since ive littered this thread(sorry) I figured id edit this post with an update. I got all the orings(easy)... went with a 2.5x50 round for that "square" one. In the opinion of that seal guy it started life as a round oring...now some of the people who work at these places arent the brightest(no offence) but this guy seemed to know his stuff.

I was happy to put things back together...that is until i tried to find that oil seal. GOODLUCK...at least locally for me. I went to 5-6 different seal/bearing places and no one had in stock,could order it and some looked at it like it was from mars.
i tried a power steering rebuilder place and they had something similar but the ID is too small (by about 2 mm) so im not gonna run it. itll burn up.
but it gave me another bearing to check out with some actual info on it. Im gonna do more research and call around to more places. It has to be out there.

as of right now im SOL. cant do anything without that seal.(yes I removed it/damaged it)

Last edited by cracky; 04-28-2011 at 01:43 PM.
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