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Old 03-10-2014, 10:44 PM   #1
Scooby Newbie
Member#: 384211
Join Date: Mar 2014
Default noisy power steering pump

changed the oil today......40000 miles on my 2009 Subaru legacy limited. checked all other fluids.....hooray for me.....I like to do it myself. but here is my problem. the power steering pump started to make a noise. only thing I can think of is.....I didn't tighten the cap all the way and it sucked in air. noticed the pump had red fluid around it and a ticking noise. turned it off . turned it back on and turned the wheel and it made a noise. the pump reservoir started to fill up with fluid and overflow and noticed bubbles in the fluid. turned it back off and made the decision that I ran the car without tightening the cap all the way, and it sucked in air....did I damage the pump and cause more problems ? im letting the car sit overnight and inspect the problem in morning, and hopefully someone could give my a answer to my stupid mistake I made today, b/c the car has been flawless since purchasing it 2 years ago. no problems till now. after checking the fluids I think I didn't put the cap on correctly and caused the air to be sucked in and causing the noise in the pump. thank you , tony
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breeby69 is offline   Reply With Quote
Old 03-11-2014, 05:41 AM   #2
n00b Moderator
Member#: 91347
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Moscow, Russia
'13 XV Crosstrek,
1050 Triumph Speed Triple


1) did you put the right fluid in the PS pump?
2) it should be fine running without the cap. The reservoir is just that. Not part of the pressurized system (I think. Could be wrong)
3) it's possibly air got sucked in somehow. Just bleed the system. Do a search and you'll find the method for that.
Loyale93 is online now   Reply With Quote
Old 03-11-2014, 10:42 AM   #3
Scooby Newbie
Member#: 375206
Join Date: Dec 2013
Chapter/Region: NWIC
Location: humboldt
2005 saabaru rex


Originally Posted by breeby69 View Post
noticed the pump had red fluid around it and a ticking noise.
if your pump, not your reservoir, has fluid around it you may need a new pump or o ring. Subaru power steering pumps are strange. when i got my car the ps pump was dumping fluid everywhere, but was quiet and worked great. had it replaced and the new one made noise within a few months. replaced that one, this new one makes a quieter noise but still present. all work done at a dealership. good luck
shredsledded is offline   Reply With Quote
Old 03-11-2014, 01:38 PM   #4
Scooby Specialist
Member#: 174883
Join Date: Mar 2008
Chapter/Region: TXIC
Location: Clear Lake Texas
2005 CGM WRX
2006 Yamaha R1


I am having problem with mine as we'll. I replaced the 2 copper crush washers and it has stoped the leaking for now. I'm going to try and use a rebuild kit on it and hope it fixes it.
iconone is offline   Reply With Quote
Old 04-20-2014, 06:15 PM   #5
Scooby Newbie
Member#: 388269
Join Date: Apr 2014

I've read a lot about these pumps and tried a few things on mine (Outback Sport 2003). Unfortunately nothing has really worked.

I had squealing due to the belt not being tight enough, but a few thousand km later when I was pulling into a parking sport something just "went" and the pump started making an awful noise. I checked the reservoir and noticed air was getting into the system.

I cut the hoses a bit shorter and used hose clamps to try and reduce any leaks from the reservoir to the pump, but that didn't help.

I bought a new o-ring from the dealership for the top of the pump, but it didn't seem to help. I later realized I nicked it while installing, so went to the hardware store and bought some more. It looks like there should be a much larger second o-ring on the top of the pump but I haven't seen any part numbers for this.

I also flushed the fluid and put new Subaru ATF, which definitely helped cut out some of the foaminess, as the old fluid was no longer bright red, more of a reddish brown.

I've driven it another 500km, though I think that highway driving is easier on the power steering.

My next step is to buy another pump (pull from salvage yard).

Attached are some pics of the system in my car.

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