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Old 02-26-2010, 11:51 PM   #1
Gamble_WRX
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Default How To: Change a power steering pump on WRX/STi

if this has already been posted delete it. i looked and did'nt see one.

This is my first write up, hopefully i don't do too bad.

its been a week so i'm going off memory
Ratchet 3/8 & 1/4
Sockets 10mm 12mm 14mm
wrenches 10mm 12mm 14mm possibly a 7/8 if you strip the banjo bolt and have to replace the fitting.

may have listed too many let me know if i did.

Easiest way to swap the power steering pump is to take off the cover, there's a tensioner bolt that's part of the PS pump, and bolted to the alternator its positioned vertically loosen it enough to remove the belt.
NOTE: you may have to use some force to move your alternator down. after you remove the belt, take the two bolts that hold the alternator in out one is on the right, its a little tricky a pair of pliers may help, then remove the bolt on the tensioner to remove the alternator. not the tensioning bolt, the one that connects the tensioner to the alternator. Keep the wires connected if you want, and pick up the alternator and move it to the right. Now, youll see some vacuum lines located on the bottom leftish of the hole you just created you'll notice a bolt vertically inserted under those lines to hold in the power steering pump. After moving the lines out of the way take out that bolt. There's two more mounting bolts you will have to feel for, one is located bottom right of your power steering pulley, the other is located straight under and slightly left of the pulley center. Now remove your banjo bolt, its on the metal line i believe its a 14 mm socket
NOTE: the banjo bolt is easy to strip out and hard to find be careful when reinserting it on installation.Torque spec is 29 Ft Lbs
After the banjo bolt is out, remove the feed line, which is only held on with a hose clamp.
SUGGESTION: buy some better hose clamps as they are weak and can cause air leaks and a never ending bleeding process.
You don't have to but alot of people have problems with the pinch clamps leaking.
Your now ready to remove it, lift it out slightly right so you can miss your turbo inlet.

its out!

To install reverse this process. When your all done i suggest flushing your PS fluid as it may have metal in it which could cause damage to the rack.


FLUSH:
To do this get two friends, one to hold the return line from the rack down ( i suggest disconnecting from the resovoir) into a drain pan, and to hold a plug or finger on the resovoir. and one to
start the car. don't turn the wheel lock to lock while doing this. While this is happening (i suggest at least a gallon of PS fluid in a single container) and pour it into the open resovoir, this process is very fast and you don't want to run the pump dry as you will be replacing it again, make sure to have your friend ready to shut off the car at your command as you will burn through 3/4 of that gallon in about 15-20 seconds. Make sure to have him plug the hose as quick as possible the reduce air bubbles to a minimum. Now to bleed make sure everything is clamped and get a set of ramps or a hill, on a flat surface turn the wheel lock to lock a few times feeling for inconsistancys. Check your fluid level repeat, note if its foaming up pull it up the hill or stands, on a hill turn it lock to lock on ramps just let it run for a minute, shut it off wait until the foam is gone, it may take 10-15 times of backing it down and pulling it back up to bleed all the air out. If you still have bubbles drive it around for a while and check your fluid every time you stop somewhere. I tried to make this as detailed as possible

I personally, did not bleed out all the air, i still had some foaming when i had to take off. by the time i got home, the air bubbles were gone completely.



Just went through this last week, figured the write up may help someone, i should've taken pictures, but i was really frustrated as i had to do some custom fab, because i have an 02 WRX and the pump was off an STi (got told it was off an 03 wrx. did'nt quite fit right. if anyone has had Experience, and wants me to add something or has found an easier way to do a PS pump, let me know in a pm and ill be glad to edit. i hope this helps someone.
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Last edited by Gamble_WRX; 07-09-2012 at 09:58 PM. Reason: found a spelling error, added torque spec
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Old 03-02-2010, 07:37 PM   #2
MRSTI28
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thank you sir!!!
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Old 03-02-2010, 08:33 PM   #3
Gamble_WRX
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no problem, glad to help someone!
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Old 03-05-2010, 10:40 AM   #4
rexworx
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How is the STI pump different? Is the pulley the same size? Mounting points are the same...

Nice write up...
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Old 03-05-2010, 12:34 PM   #5
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Quote:
Originally Posted by rexworx View Post
How is the STI pump different? Is the pulley the same size? Mounting points are the same...

Nice write up...
fitting and pipe location are slightly different [inlet/outlet]
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Old 09-26-2010, 11:27 AM   #6
2:43AM
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Can you please edit and supply the OEM torque spec on the banjo bolt to the pump?

EDIT: iwsti.com lists power steering banjo @ 29 ft-lbs. Sounds reasonable, but I cannot confirm in the service manual.

Last edited by 2:43AM; 09-26-2010 at 11:40 AM.
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Old 10-17-2010, 08:22 PM   #7
ReD-DaWg-OnE
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I followed the directions and am having an issue...

I got the new pump on disconnected the inlet hose from the reservoir as I help my finger over the inlet so the fluid would stay in the reservoir started the car added fluid and started the car.

Once I reconnected it all my wheel is really hard to turn and it looks like there is a lot of fluid being moved around in the reservoir. Also if I turn the wheel right after I start the car it makes a squealing noise.
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Old 10-18-2010, 01:29 AM   #8
ReD-DaWg-OnE
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So i found that their were a couple of lose lines in the pump, i don't think my pump had the crush washer and i couldn't find where it goes when you install the banjo bolt. Any help would be great!

I think i am going to have to take it all apart again and see where i messed up... I might not have the pully on their tight enough which i guess could also cause the issue.... Also the fluid is moving pretty violently in the reservoir.

Last edited by ReD-DaWg-OnE; 10-18-2010 at 04:36 AM.
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Old 01-25-2012, 07:38 PM   #9
whokidd
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Does this work for an 02' WRX?
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Old 02-23-2012, 09:41 PM   #10
Gamble_WRX
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it was performed on an 02 WRX... (sniffle) mine.

sorry i havnt edited, i havnt been on much in the past years. im on the lookout for a new subie, hopefully ill find something cheap. and ill edit this tommorrow, i dont have time right now.
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Old 02-23-2012, 09:48 PM   #11
alexISonFIRE
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Good write up. Hopefully I'll never have to use it though
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Old 12-22-2012, 04:55 PM   #12
jlukowski
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Quote:
Originally Posted by ReD-DaWg-OnE View Post
i don't think my pump had the crush washer and i couldn't find where it goes when you install the banjo bolt. Any help would be great!
Did you ever figure this out?
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Old 12-23-2012, 09:25 AM   #13
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Quote:
Originally Posted by jlukowski View Post

Did you ever figure this out?
Two crush washers are needed on the banjo bolt. The OEM is a one piece crush washer where both are attached. If that makes sense.

I must not have had mine tight enough because on startup it leaked from the banjo bolt. Gave it a quick snug and it stopped

Replacing the pump was some of the best fun I've had with my Subie in a long time and now my 103000 mile DD has butter smooth steering!
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Old 12-24-2012, 02:54 AM   #14
Frankh21
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Quote:
Originally Posted by SubieMonte View Post
Two crush washers are needed on the banjo bolt. The OEM is a one piece crush washer where both are attached. If that makes sense.

I must not have had mine tight enough because on startup it leaked from the banjo bolt. Gave it a quick snug and it stopped

Replacing the pump was some of the best fun I've had with my Subie in a long time and now my 103000 mile DD has butter smooth steering!
I just did mine as well, twice!!!!

First time I was a fool to trust a rebuilt unit from autozone. I put it on, bled it, and bled it, and bled it and so on and so on for two days and the damn thing still kept foaming up and had no power steering. I finally bit the bullet and bought one from the dealer and bled it on one shot and it works perfect, "butter smooth" as you said, no foaming, no issues. When I looked at the one from autozone, it said made in China, I should have known better . At least I got my refund from autozone, but damn, those OEM ones are pricey!
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Old 12-24-2012, 01:40 PM   #15
04reddragon
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yea mine is up its leaking every where and it sucks being cold out and having to turn quick and bammm u cant cause no ps. Nice write up though may tackle this soon. So how long did this take u to do??
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Old 12-26-2012, 01:35 AM   #16
Frankh21
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took me about 2 hours first time and about an 1 1/2 hours the second time.

Also I took a few pics for those that want to tackle this and don't have a vice.


I didn't have a vice so I used a socket (forgot the size but whatever fit through the hole in the pulley) and the 19mm wrench to get the pulley off.


Instead of using a swivel socket or uv joint I just pulled off a few of the connectors adjacent to the bolt and used a 3/8" wrench to get at the hard to reach bolt.


Hope this helps anyone that will be tackling this. FYI, buy the OEM pump, screw all the crap from autozone, oreily, etc. The OEM actually came with the pulley, O-rings and pressure switch connector.

Last edited by Frankh21; 12-26-2012 at 03:37 AM.
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Old 12-26-2012, 07:32 PM   #17
jlukowski
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Quote:
Originally Posted by SubieMonte View Post
Two crush washers are needed on the banjo bolt. The OEM is a one piece crush washer where both are attached. If that makes sense.
The OEM double crush washer (a.k.a., "gasket") is part number 34621ac024 for a 2005 STI and runs about $3.50.
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Old 12-27-2012, 03:14 PM   #18
04reddragon
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yea alil too much from the dealer just getting mad every morning when its cold cause it whines and only turning right theres no ps wierd
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Old 03-31-2013, 11:14 PM   #19
amdmaxx
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thank you.. this thread needs more pictures.

Anyone know where I can get the steering pump for my 2006 saabaru (same as wrx)? And whats the outgoing price?


Quote:
Originally Posted by Gamble_WRX View Post
if this has already been posted delete it. i looked and did'nt see one.

This is my first write up, hopefully i don't do too bad.

its been a week so i'm going off memory
Ratchet 3/8 & 1/4
Sockets 10mm 12mm 14mm
wrenches 10mm 12mm 14mm possibly a 7/8 if you strip the banjo bolt and have to replace the fitting.

may have listed too many let me know if i did.

Easiest way to swap the power steering pump is to take off the cover, there's a tensioner bolt that's part of the PS pump, and bolted to the alternator its positioned vertically loosen it enough to remove the belt.
NOTE: you may have to use some force to move your alternator down. after you remove the belt, take the two bolts that hold the alternator in out one is on the right, its a little tricky a pair of pliers may help, then remove the bolt on the tensioner to remove the alternator. not the tensioning bolt, the one that connects the tensioner to the alternator. Keep the wires connected if you want, and pick up the alternator and move it to the right. Now, youll see some vacuum lines located on the bottom leftish of the hole you just created you'll notice a bolt vertically inserted under those lines to hold in the power steering pump. After moving the lines out of the way take out that bolt. There's two more mounting bolts you will have to feel for, one is located bottom right of your power steering pulley, the other is located straight under and slightly left of the pulley center. Now remove your banjo bolt, its on the metal line i believe its a 14 mm socket
NOTE: the banjo bolt is easy to strip out and hard to find be careful when reinserting it on installation.Torque spec is 29 Ft Lbs
After the banjo bolt is out, remove the feed line, which is only held on with a hose clamp.
SUGGESTION: buy some better hose clamps as they are weak and can cause air leaks and a never ending bleeding process.
You don't have to but alot of people have problems with the pinch clamps leaking.
Your now ready to remove it, lift it out slightly right so you can miss your turbo inlet.

its out!

To install reverse this process. When your all done i suggest flushing your PS fluid as it may have metal in it which could cause damage to the rack.


FLUSH:
To do this get two friends, one to hold the return line from the rack down ( i suggest disconnecting from the resovoir) into a drain pan, and to hold a plug or finger on the resovoir. and one to
start the car. don't turn the wheel lock to lock while doing this. While this is happening (i suggest at least a gallon of PS fluid in a single container) and pour it into the open resovoir, this process is very fast and you don't want to run the pump dry as you will be replacing it again, make sure to have your friend ready to shut off the car at your command as you will burn through 3/4 of that gallon in about 15-20 seconds. Make sure to have him plug the hose as quick as possible the reduce air bubbles to a minimum. Now to bleed make sure everything is clamped and get a set of ramps or a hill, on a flat surface turn the wheel lock to lock a few times feeling for inconsistancys. Check your fluid level repeat, note if its foaming up pull it up the hill or stands, on a hill turn it lock to lock on ramps just let it run for a minute, shut it off wait until the foam is gone, it may take 10-15 times of backing it down and pulling it back up to bleed all the air out. If you still have bubbles drive it around for a while and check your fluid every time you stop somewhere. I tried to make this as detailed as possible

I personally, did not bleed out all the air, i still had some foaming when i had to take off. by the time i got home, the air bubbles were gone completely.



Just went through this last week, figured the write up may help someone, i should've taken pictures, but i was really frustrated as i had to do some custom fab, because i have an 02 WRX and the pump was off an STi (got told it was off an 03 wrx. did'nt quite fit right. if anyone has had Experience, and wants me to add something or has found an easier way to do a PS pump, let me know in a pm and ill be glad to edit. i hope this helps someone.
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Old 04-01-2013, 03:42 AM   #20
Frankh21
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The Subaru dealer. About $400 I think
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Old 04-04-2013, 07:25 AM   #21
jlukowski
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I paid $545 for the STI pump at the dealer. Beware that Subaru has changed this pump model number and design 3 times. I have a STI pump that only needs rebuilding. If you are interested PM me.
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Old 04-05-2013, 06:51 AM   #22
Gamble_WRX
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sorry for the lack of pictures, it was my first write up. im impressed this thread has over 14000 views.
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Old 04-05-2013, 08:05 AM   #23
Aaron'z 2.5RS
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I think most of this gets covered in the "How to rebuild an STi PS pump" thread... http://forums.nasioc.com/forums/show....php?t=2127419

Initiative is good though...
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Old 04-06-2013, 08:22 AM   #24
jlukowski
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Quote:
Originally Posted by Aaron'z 2.5RS View Post
I think most of this gets covered in the "How to rebuild an STi PS pump" thread... http://forums.nasioc.com/forums/show....php?t=2127419

Initiative is good though...
Good catch, I forgot to mention that.
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