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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 12-14-2008, 07:01 PM
NC530i-2003 NC530i-2003 is offline
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Power steering leak 2003 530i- Need advice

Hi- I have a power steering leak in one or both hoses from the power steering reservior. Dealer said it was $250 per hose to replace. I noticed the clamps and hoses are quite complicated

Anyone do this themselves?

Thanks
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  #2  
Old 12-14-2008, 08:38 PM
Steve530 Steve530 is offline
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I replaced the original Oetiker hose clamps with the standard hose clamps on those hoses. I cut off the Oetiker clamps with a pair of side cutters. I didn't have to drain the reservoir because I didn't remove the hoses. I just opened up screw type hose clamps, put them on the hoses, re-engaged the screws, and tightened them down.

The hoses apparently swell and the clamps loosen. If I were to do it again, I'd drain the reservoir and cut off a small length of the hose where they attach to the reservoir to remove the swollen part of the hoses.
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  #3  
Old 12-14-2008, 10:00 PM
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MikeCTM2 MikeCTM2 is offline
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yup

yeah just replace the clamps right under the reservoir wish i would have known that. i had the hoses replaced then found out just new clamps would have done it
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  #4  
Old 12-14-2008, 10:56 PM
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tee-dub tee-dub is offline
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There are a few DIY's on this subject. A good thing to do is use a baster or syringe and suck out the fluid from the res. Replace the res since it has a non removable filter in it and the reservoirs aren't very much money. Then, cut off the last 1/2 of the hose and re-attach it with worm drive clamps. Problem solved, plus you got a new filter and some new fluid in the PS reservoir!
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  #5  
Old 12-15-2008, 05:04 AM
kennycoder kennycoder is offline
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Hello. I've just replaced both hoses. Its very easy DIY. The most tricky part is not to get dirty. Both hoses are cheap (buy them at BMW) and get ATF oil (I got Mobil ATF). Flush the oil. Unplug both hoses, but be careful 'cause there is always some oil left. Replace them and get some normal hose clamp, DON'T use ones that come with hoses. Put everything back to place. Fill the ATF oil reservoir to the top. Leave it open. Start your car for 2 secs MAX and then shut it off. Oil will go down. Fill it again, do the same (2 secs). If the oil level keeps the same, close the reservoir, start the car, turn your steering wheel to the max left and then max right. Check your ATF oil level again. If it's the same, you are good to go.
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  #6  
Old 12-15-2008, 05:38 AM
Salselina Salselina is offline
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Thank you kennycoder. Thats the information i was looking for. How many quarts does the power steering reser. take. Just for the heck of it, where is this reservior under the hood? Again thank.

Selina
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  #7  
Old 12-15-2008, 05:46 AM
Salselina Salselina is offline
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Wink Needed Owners manuel for 540i 1997

I just bought this car from the auction and it didn't have a manuel. It also is squeeking under the hood when a make turns. Can you tell me where to pour the oil into, whr is the reservior located. does any one have a manuel for the 1997 540i, for free? i just paid taxes, bought a car and lost my job. Bummmer.

Thanks for your time.

Selina A
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  #8  
Old 12-15-2008, 06:21 AM
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flyboyy flyboyy is offline
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Quote:
Originally Posted by kennycoder View Post
Hello. I've just replaced both hoses. Its very easy DIY. The most tricky part is not to get dirty. Both hoses are cheap (buy them at BMW) and get ATF oil (I got Mobil ATF). Flush the oil. Unplug both hoses, but be careful 'cause there is always some oil left. Replace them and get some normal hose clamp, DON'T use ones that come with hoses. Put everything back to place. Fill the ATF oil reservoir to the top. Leave it open. Start your car for 2 secs MAX and then shut it off. Oil will go down. Fill it again, do the same (2 secs). If the oil level keeps the same, close the reservoir, start the car, turn your steering wheel to the max left and then max right. Check your ATF oil level again. If it's the same, you are good to go.

anyone have the part number for the 2 power steering hoes that connects to the reservoir ?
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  #9  
Old 12-15-2008, 06:41 AM
kennycoder kennycoder is offline
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Search here:
http://www.realoem.com/bmw/select.do
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  #10  
Old 12-15-2008, 06:43 AM
kennycoder kennycoder is offline
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Reservoir looks like this:
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  #11  
Old 12-15-2008, 07:45 PM
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edirty9 edirty9 is offline
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this is easy and strait forward... the hardest part is probably the point where its the return line i think its a 13mm bolt.. un bolt change out the hoses put bolt back put hoses on the PS reservoir and bolt ps reservoir pour fluid and turn as above said and pour till full on the dipstick on the ps reservoir cap pop a ber and enjoy
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  #12  
Old 12-16-2008, 06:10 AM
cn90 cn90 is offline
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Usually it is a weak clamp at the bottom of the PS Reservoir.

In this Cooling Overhaul write-up for 98 528i, you can see the PS reservoir at Figure 19:
http://www.bimmerboard.com/forums/posts/199986

- Drain most of the ATF out (small yogourt/plastic cap container to catch the ATF.
- Remove the existing clamp (cutting pliers)
- Just cut a short section off the end of the hose
- Re-attach it with new clamp (worm type).
Then fill with Mobil 1 SYNTHETIC ATF.

Start the car, turn steering wheel to complete stops at R and L, then check the PS Servoir and fill as necessary.

Last edited by cn90; 12-20-2008 at 08:01 AM.
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  #13  
Old 12-20-2008, 03:55 AM
NC530i-2003 NC530i-2003 is offline
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I have been traveling and no internet access- holy cow!- what a rip the dealer is- i will call parts and then see the difference to just clamp it.

This forum is great-
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  #14  
Old 12-20-2008, 08:06 AM
cn90 cn90 is offline
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As I mentioned above, remove a bit of the PS hose as in Figure 19.
- To remove the factory clamp, you need to use a cutting pair of pliers.
- Catch the fluid with a small plastic container.
- Remove about 1/2 inch off the hose.
- Re-attach using a worm-type clamp.
- Add Mobil 1 ATF.
I did this in May 2006, knock on wood, not a single drop of leak since.

PS: It is NORMAL to see a bit of seepage out of the vent hole in the PS Cap. Just wipe it once a month to keep the reservoir clean.

Last edited by cn90; 12-20-2008 at 08:08 AM.
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  #15  
Old 12-20-2008, 10:18 AM
NC530i-2003 NC530i-2003 is offline
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I simply removed the old clamp and place the new clamp on- to do this I removed the reservior bracket for better acces- if i see a leak again, i will cut the hose a bit.

thanks to all!
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  #16  
Old 01-13-2010, 06:44 AM
mwalam mwalam is offline
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what type clamp did you guys use? where would i get the "worm-type" clamp..
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  #17  
Old 01-13-2010, 07:58 AM
cn90 cn90 is offline
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Quote:
Originally Posted by mwalam View Post
what type clamp did you guys use? where would i get the "worm-type" clamp..
The Fcatory clamp is known as "Oertiker" clamp.

Worm-type or screw-type clamps are the same.
Any local autoparts stores sell them.
Drive the car overthere and ask the parts guy to come out and advise you what size to buy.
The O.D. of the PS hose is about 1/2 inch or so.
http://www.amazon.com/gp/product/B00...0FS6TEA6K62GGB
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  #18  
Old 04-10-2010, 09:31 PM
cn90 cn90 is offline
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For those who want to change the two (2) PS Hoses, this is a fantastic DIY from E46, almost identical to e39, here you go:
http://www.bimmerfest.com/forums/sho...d.php?t=414455
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  #19  
Old 04-11-2010, 07:08 AM
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Quote:
Originally Posted by NC530i-2003 View Post
I have been traveling and no internet access- holy cow!- what a rip the dealer is- i will call parts and then see the difference to just clamp it.

This forum is great-
I had all my power steering hoses replaced when i bought it, done at an indy for 1/2 the cost of the stealer, but still cost a few hundred as it is a PITA to do them all, I had the belts done at the same time. Apparently another very common e39'ism so if you have not done them yet, you will!
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  #20  
Old 04-11-2010, 08:41 AM
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DHoang DHoang is offline
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Once a car reaches a certain age and mileage, some sort of leak will typically occur due to aging rubber. Leaks tend to attract dirt, and dirt then gets inside of the fluid path and contaminates all the moving parts internally, first starting with wearing out the steering rack seals, then the compressor seals, then clog up the filter inside the reservoir.

IMO, there does come a point where, just like doing a coolant or suspension or vacuum overhaul , overhauling the entire steering system all at once is the only way to go. I estimate this tb a ($225 hoses+$300 rack+$350pump+$25reservoir=) $900 DIY overhaul.
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  #21  
Old 05-25-2010, 04:42 PM
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bluebee bluebee is offline
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Quote:
Originally Posted by DHoang View Post
some sort of leak will typically occur due to aging rubber.
And a clogged permanent filter in the power-steering reservoir bottom might also take its toll.

Just by way of advice, anyone working with the power steering will want to flush in Dexron VI fluid (it takes about a half quart if you suction it out from the top).

And, you'll want to replace the power steering fluid reservoir cap o ring (to prevent an always-wet cannister).

I'm looking for the cause of a morning-start squeal that I think is related to the power steering - because it abated when I twice flushed the fluid reservoir.

I even picked up a mechanics stethoscope today to try to pinpoint the cause of the cold-start squeal ...

Video Here



Last edited by bluebee; 05-25-2010 at 04:44 PM.
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  #22  
Old 04-15-2011, 08:11 PM
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Quote:
And a clogged permanent filter in the power-steering reservoir bottom might also take its toll.
Just to update this thread, we have new advice for the users:
  • Every oil change, suction out about 8 ounces (250 ml) of the power steering fluid and replace with Dexron VI ATF
  • Every five years (or so), when you replace the two lower oil-filter stem o-rings, also replace the o-ring in the power steering fluid reservoir cap
  • Likewise, every five years (or so), remove the T20 Torx bolt holding down the circular screen filter in the bottom of the power steering fluid reservoir and flush with gasoline (off the vehicle!) to clean the screen
See also these threads from the VERY best of E39 Links

- How to clean the power steering fluid reservoir internal filter (1) & how to replace the cap o-ring (1) (2) & why you want to fix the power steering hose drip onto the alternator (1) (2) (3) & how to debug PSP power steering pump noises (1) (2) (3) or steering rack noises (1) & a nice power steering pump autopsy photo (1) & how to flush fix cloudy ATF fluid (1) (2) and what PS fluid to use (1) (2) & DIYs to replace the power steering hoses (1) (2) (3) (4) (5).


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