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Old 02-11-2013, 01:16 PM   #1
bouncing_soulz
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Default Power Steering Pump issue - thoughts???

background-

I have an 05 sti with 49k miles on it. The original pump was making the groaning noises typically associated with a failing power steering pump. I went to rockauto and bought a re-manufactured pump and had it installed.

I go to pick up my car having the new pump installed and the mechanic says he thinks there is still some air in the lines because it can be occasionally hard to turn. He also notes that because Subarus have a self bleeding system that the air should simply work it's way out with some more drive time.

After having the pump on for a week and driving roughly 200 miles the pump is still having issues.

The issues that the pump is having is not typical of air in the lines (or at least from what I have heard). When I start the car the pump/steering seems to be just fine (no groaning, stiffness in turning). After the car warms up steering can be difficult when the car is sitting at idle or turning at low speeds at idling RPM's. Sometimes the pump will make cavitation type noises and kick back while I am trying to turn and even stop me from turning the wheel altogether in some instances.

The only way I have found to get past this cavitation, kicking, stuff is to give the car some gas and then it seems to work just fine.

The pump does have fluid in it, and has the correct fluid.

I brought the car back to the mechanic and he thinks that the pump might be bad but to drive it around a little more before we decide on that.

So.. what does nasioc think? Bad Pump? or Air in the lines?

Spanks!!
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Old 02-11-2013, 01:27 PM   #2
Mr Wrex
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Start by checking for bubbles in the fluid while your friend turns the wheel. The stock clamps on the powersteering hoses aren't the best and sometimes allow air to work its way into the system. While you're at it, check if the fluid smells burnt.
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Old 02-11-2013, 01:32 PM   #3
bouncing_soulz
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Quote:
Originally Posted by Mr Wrex View Post
Start by checking for bubbles in the fluid while your friend turns the wheel. The stock clamps on the powersteering hoses aren't the best and sometimes allow air to work its way into the system. While you're at it, check if the fluid smells burnt.
Sorry... forgot to mention that.

-no bubbles while turning or bubbles in the reservoir after driving it.

I'll stink my noise down in there this evening to see if it smells burnt.
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Old 02-11-2013, 02:56 PM   #4
Zondacl2
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I know it was prolly looked at but just in case have u checked the tension in the belt i had the same problem and my belt was loose, wen on idle it was hard to turn and made winding noises. Had to give it gas to assist me while parking ohh and one of my pulleys was seized.
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Old 02-11-2013, 02:59 PM   #5
bouncing_soulz
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I personally have not checked the tension on the belt, but that's another good idea. I'll check that tonight as well.
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Old 02-12-2013, 02:21 PM   #6
bouncing_soulz
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just bought a new one.

no burning smell. tension was all there in the belt.

will keep everyone posted.
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Old 02-12-2013, 02:50 PM   #7
Frankh21
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There have been so many posts about bad power steering pumps and people are still replacing them with rebuilt units. I can't stress enough that if you want peace of mind drop the cash down for a NEW OEM unit and your worries will go away.

I have gone through this rite of passage already and OEM (comes with new pulley and wiring harness) from the stealership is the way to go. The other alternative is to rebuild the original one(with new orings) if it is feasible to do so.

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Old 02-12-2013, 05:50 PM   #8
bouncing_soulz
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yeah but I just bought 2 remand pumps for 150 less than the price of a new OEM pump.

As long as this one works... I'll be fine
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Old 02-12-2013, 06:19 PM   #9
25rsti
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Also, besides the clamps you should have tried to replace the o-ring on the top of the pump.

Replace clamps and o-ring on the suction side of the pump. IF those don't work along with the belt being ok or replaced then buy a new unit.
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Old 02-22-2013, 04:04 PM   #10
bouncing_soulz
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so... I went ahead and returned the reman'd pump for a second... it's better but still kicks back on me periodically.

This weekend I am going to try the lucas oil power steering pump additive to see if that helps. If it doesn't I am just going to bite the bullet and pay for the OEM Pump... *sigh* this is turning into a PITA.
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Old 02-22-2013, 05:18 PM   #11
68Cadillac
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DIY: Power Steering Pump Rebuild for OP's exact pump right here on Nabisco. Plus upgrade material information for every O-Ring, shaft seal, and bearing.
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Old 02-23-2013, 01:34 AM   #12
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That Lucas PS additive basically alters the viscosity to help prevent leaks. You're best bet is to just use the recommended fluid and get that OEM pump so you can have peace of mind.
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Old 02-25-2013, 10:42 AM   #13
bouncing_soulz
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Quote:
Originally Posted by Frankh21 View Post
That Lucas PS additive basically alters the viscosity to help prevent leaks. You're best bet is to just use the recommended fluid and get that OEM pump so you can have peace of mind.
My understanding was that it increases viscosity and thus could help get any air bubbles/pockets out of the system and could help it function better?

I am going to give it a shot this Tuesday. Didnt get around to trying it this weekend like I wanted. Car has been sitting under a cover since this crap started happening.

I still think the OEM pump is going to be the way I ultimately go...
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Old 02-25-2013, 02:39 PM   #14
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Quote:
Originally Posted by bouncing_soulz View Post
My understanding was that it increases viscosity and thus could help get any air bubbles/pockets out of the system and could help it function better?

I am going to give it a shot this Tuesday. Didnt get around to trying it this weekend like I wanted. Car has been sitting under a cover since this crap started happening.

I still think the OEM pump is going to be the way I ultimately go...
I don't believe that's correct in regards to the Lucas additive reducing bubbles/air pockets. The additive just makes the existing fluid more viscous to reduce leaks in the system and is more of a temporary fix than addressing the underlying cause of your problem.
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Old 02-25-2013, 02:42 PM   #15
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Gotcha. Well I'll give it a shot.

I just bought an OEM pump from Subaru. Even with my discount the thing was $460. I'll keep my fingers crossed that the additive and some more driving will fix the problem so I can return this bad boy.
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Old 02-26-2013, 06:56 PM   #16
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hi everyone, sorry for posting on your thread but i have been having some ps. problems of my own and being a newb nasioc wont let me post up, so here goes... in late december when it was in the low 30 degree range my 07 wrx started whining on start up, and having air bubbles in it here and there... so i replaced it with a remanufactured pump from auto zone (and yes i know they're parts are **** now)... well when i put this thing in it seemed to work fine; steering was a little heavy but all together fine... the next morning i went to leave for school and the car had pissed itself... so i left her there... when i got back later that day i took it back out and inspected it... i ended up putting the old ring back in it... well this time it stopped working all together... im not sure if it was the ring, or if the pump just decided to die, so needless to say i returned it and got another one... this one (also remanufactured from auto zone) had a bent screw hole, and a smashed sensor... so i returned it and got a new one... well this time they sent me one for an 02-05 (new)... i protested putting this thing in my 07, but in the end i did and it works fine... the only problem is it whines like a little "B" (you can hear it best from around 2000 rpm's to 3500 rpm's, then the little beast is too loud and you cant hear it)... i have tried everything i can think of... I've tried new hose clamps (the ones that you screw on), new reservoir... ive bled the thing and changed the fluid a million times, i even took it to the shop to have it vacuumed ( waste of money... not my idea)... so if anyone has any ideas or comments, please post up, anything will help... and once again im sorry for bogging up your thread with my own problems.
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Old 02-26-2013, 07:03 PM   #17
bouncing_soulz
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Quote:
Originally Posted by Highschoolhawkeye View Post
hi everyone, sorry for posting on your thread but i have been having some ps. problems of my own and being a newb nasioc wont let me post up, so here goes... in late december when it was in the low 30 degree range my 07 wrx started whining on start up, and having air bubbles in it here and there... so i replaced it with a remanufactured pump from auto zone (and yes i know they're parts are **** now)... well when i put this thing in it seemed to work fine; steering was a little heavy but all together fine... the next morning i went to leave for school and the car had pissed itself... so i left her there... when i got back later that day i took it back out and inspected it... i ended up putting the old ring back in it... well this time it stopped working all together... im not sure if it was the ring, or if the pump just decided to die, so needless to say i returned it and got another one... this one (also remanufactured from auto zone) had a bent screw hole, and a smashed sensor... so i returned it and got a new one... well this time they sent me one for an 02-05 (new)... i protested putting this thing in my 07, but in the end i did and it works fine... the only problem is it whines like a little "B" (you can hear it best from around 2000 rpm's to 3500 rpm's, then the little beast is too loud and you cant hear it)... i have tried everything i can think of... I've tried new hose clamps (the ones that you screw on), new reservoir... ive bled the thing and changed the fluid a million times, i even took it to the shop to have it vacuumed ( waste of money... not my idea)... so if anyone has any ideas or comments, please post up, anything will help... and once again im sorry for bogging up your thread with my own problems.
Your problem is simmilar enough to mine.

I just bought an OEM pump... these reman'd pumps are proving to not be worth the trouble.

Get an OEM pump like I am doing.
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Old 02-26-2013, 07:07 PM   #18
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yea man i think it pretty much coming to that the only prob is im broke of my ass... im thinking about depending on how everything goes either getting one from o'reilly (recomended by shop where it was vacuumed) or just pulling $500 bucks out of my hat and getting one from subaru
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Old 02-26-2013, 07:09 PM   #19
bouncing_soulz
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you could just delete your pump for a little while and run without power steering as you save for the $500 pump?

I paid 460 for the pump after taxes. I got a 10% discount after shooting the sh!!t with the parts guy for a few minutes. Any little bit helps
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Old 02-26-2013, 07:18 PM   #20
Highschoolhawkeye
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no see thats the thing that is throwing me off... the thing works great... no slip ups, it just whines... anyway i just got my fender dented by some kid in a jeep yesterday in my school parking lot so it will be going into the shop here pretty soon to figure out what my prob is... also i forgot to post, the dude that vacuumed it out also did a diagnostic and said the whine was coming from the pressure release valve on the pump. the problem with this is the people that sent me the pump said that shouldnt be the problem bc its a brand new pump (they r probably just trying to save a buck tho)
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Old 03-25-2013, 11:46 AM   #21
bouncing_soulz
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so... I think Rock Auto kept sending me WRX power steering pumps rather than STI pumps. As soon as I installed the OEM pump it whined for about 5 seconds then has been perfect ever since.

Moral of the story... buy OEM. haha
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Old 03-25-2013, 02:20 PM   #22
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Told yah so! Glad it worked out.
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Old 03-25-2013, 05:24 PM   #23
bouncing_soulz
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Quote:
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Told yah so! Glad it worked out.
It's ok I had to be stubborn and learn the hard way... it happens
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Old 03-28-2013, 01:33 AM   #24
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Glad the OEM worked out. I just replaced all my Orings on my PS pump last week with help from a forum here. So far so good i hope she holds up. Thats $500 bucks in my pocket so far. Steering feels a lot smoother now too.
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Old 04-18-2013, 04:33 AM   #25
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Hey guys, I am also a "Scooby Newbie" and also having some issues. My PS pumps's bearings are going and its also making a squealing noise (Tension has been checked)... They are both horrible sounds and it is embarrassing at times . I would rebuild it but I'm not sure if there is a way to replace the bearings (If there is please point me in the right direction I didn't see anything on the rebuild thread).

My other plan is to purchase one from a junk yard for $35-45+shipping and rebuild it if it leaks.

Any Ideas/comments? P.S. I absolutely don't have enough $ for a new OEM one from Subaru. Other than the noises the the actually PS is very smooth
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