E90Post
 


N54Tuning.com
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > Power Steering Flush DIY E90



Reply
 
Thread Tools Search this Thread
      05-18-2013, 10:44 PM   #67
ska///235i
***** noob
ska///235i's Avatar
United_States
534
Rep
10,280
Posts

Drives: 325xi>M235i>428GCx Mspor
Join Date: Sep 2005
Location: Boston

iTrader: (34)

Garage List
2006 325xi  [0.00]
man you guys are crazy doing all that work for steering fluid...just suck out fluid from reservior with a fluid extractor and refill, then start the car and turn steering left-right...repeat (3 times) until you use the entire bottle of ch11s. Do this every 30k-40k miles and you're golden. I also replaced the reservor cap with a new one that has a o-ring. My 2006 e90 stock cap didnt have the o-ring and it had alot residual on the cap...highly recommend if your cap do not have o-ring.

I use this oil suction gun...works like a charm. One pull and all the fluid was out of the reservior

http://www.harborfreight.com/oil-suction-gun-95468.html
__________________
2006 325xi (Sold)
2014 M235I (Current)
2015 428xi Gran Coupe (STB)

Last edited by ska///235i; 05-18-2013 at 10:52 PM.
Appreciate 0
      07-12-2013, 11:33 AM   #68
Zero_09
Captain
Canada
18
Rep
616
Posts

Drives: 07 E90, 2011 E90
Join Date: Jul 2012
Location: =

iTrader: (1)

Quote:
Originally Posted by mthomas View Post
I modified the original approach as I could not envision how to do it without making a complete mess of the vehicle and garage floor. I think this is actually the e46 method referenced by the OP in his posting.

Less messy technique:

Lift front of vehicle. Please do this safely.

Remove plastic underbody, air box, and air intake duct from in front of engine to aid access.

Release the tension on the serpentine belt, and move it out of the way to improve access and prevent getting any oil on to it. This is a great time to do maintenance in this area as well.

Completely drain the reservoir with your suction device of choice. Get down behind the filter to minimize mess in the next step. I got about 250 ml out, it was a little bit low to start.

Remove the banjo bolt at the bottom of the PS pump. I removed by reaching in from above. This allowed me to place some aluminum foil, prior to opening the bolt, below and channel the fluid forward and into a container with a funnel on top, with minimal mess. It is also an easy bolt to access, and retighten.

Turning the steering wheel repeatedly from stop to stop for about five or ten minutes will pump fluid up to the reservoir, which will then drain down to the pump and out the bottom. I also used a small syringe to again fully empty the reservoir. I was able to get another 450 ml of fluid out.

Replace the banjo bolt and line, use new crush washers.

Degrease any pulleys that might have been contaminated, then replaced serpentine belt.

I refilled with 700 ml of fluid. This takes a little while, turn the steering wheel, start and stop the engine, etc. Ignored the horrible noises, got the air out and ran the engine for a while, then emptied the reservoir again and refilled with the remaining 300 ml in the can.

Assuming a 1 liter capacity (complete guess), this means the first flush left 30% old fluid, and the second, reservoir only, flush got it down to about 22% old fluid. Looks much better, but I wish there was a way to get all the fluid out. Using the easier drain reservoir and refill method, five cycles should get you to the same place, but would require 1.25 liters of fluid.Hope this helps someone. Sorry no pics, there are plenty of them above. The PS pump is right above the rack and to the front. Just trace the lines.
This is one of the reason I'd rather not drained it this way. If I have to take out the air box, air intake duct, and serpentine belt to prevent from making a mess than I think I'd go the turkey baster route.
Appreciate 0
      08-17-2015, 01:02 PM   #69
Ghos7N54
Enthusiast
Ghos7N54's Avatar
34
Rep
198
Posts

Drives: E90 335i Sport
Join Date: Sep 2014
Location: TX

iTrader: (0)

I wanted to revive this thread for one, it has been very informative and helpful. Secondly my cap says use ATF only, so I planned on picking up Castrol ATF, but how can I be sure that ATF is whats currently in the system and not CHF? Just cautious of this since CHF and ATF CANNOT be mixed.
__________________
E90 335i Sport///Steptronic///Adaptive Lighting///Logic7///Clean & Stock
Benz W204 C300 Luxury
545i Sport 6spd Shadowline (sold)
98 Lex GS300 2J Twin Turbo 17PSI (sold)
E21 320i (sold)
Appreciate 0
      08-17-2015, 04:27 PM   #70
duaux
Private
5
Rep
87
Posts

Drives: .
Join Date: Aug 2010
Location: .

iTrader: (0)

Quote:
Originally Posted by Ghos7N54 View Post
I wanted to revive this thread for one, it has been very informative and helpful. Secondly my cap says use ATF only, so I planned on picking up Castrol ATF, but how can I be sure that ATF is whats currently in the system and not CHF? Just cautious of this since CHF and ATF CANNOT be mixed.
Unfortunately, you can not be "certain".

My mechanic based it on "his experience", looking at the colour and smelling it. He basically also told me that "he is 100% certain" that all E90 came with CHF for power steering and that my car just "lost the green sticker".

***WARNING*** I am not telling you to following me... experience may differ!

For me, I trusted him and he flushed it with CHF (full drain and fill). It has been 2 years and my car is fine.
Appreciate 0
      08-17-2015, 08:04 PM   #71
Ghos7N54
Enthusiast
Ghos7N54's Avatar
34
Rep
198
Posts

Drives: E90 335i Sport
Join Date: Sep 2014
Location: TX

iTrader: (0)

Quote:
Originally Posted by duaux View Post
Unfortunately, you can not be "certain".

My mechanic based it on "his experience", looking at the colour and smelling it. He basically also told me that "he is 100% certain" that all E90 came with CHF for power steering and that my car just "lost the green sticker".

***WARNING*** I am not telling you to following me... experience may differ!

For me, I trusted him and he flushed it with CHF (full drain and fill). It has been 2 years and my car is fine.
You just happened to be right anyways

Just talked to an old buddy that works at BMW of San Antonio and he looked it up and did confirm that my 2007 E90 335i does require CHF 11. Thanks!
__________________
E90 335i Sport///Steptronic///Adaptive Lighting///Logic7///Clean & Stock
Benz W204 C300 Luxury
545i Sport 6spd Shadowline (sold)
98 Lex GS300 2J Twin Turbo 17PSI (sold)
E21 320i (sold)
Appreciate 0
      08-18-2015, 07:25 PM   #72
mweisdorfer
Major
mweisdorfer's Avatar
United_States
109
Rep
1,440
Posts

Drives: 2007 Black/black 335i e90
Join Date: Apr 2011
Location: Holly, MI

iTrader: (0)

Garage List
2007 BMW E90 335i  [0.00]
2008 bmw x5  [0.00]
Quote:
Originally Posted by Sexyjen
My car needs power steering fluid. 2007 335i. I've heard 2 separate brands to try but not sure which one. Anyone know which i am supposed to use?
I just used a brake vac and had a buddy of mine turn on the car with the front end on Jack stands. He turned the car on and turned the wheel several times while I sucked out the old chs11.

I put AMSOIL ATF back in. We poured the new AMSOIL in while the car was still on and turned the wheel several times to make the pump suck the new ATF in. We did this until the pump stopped whining and the level of the fluid remained constant in the reservoir.

We then used the brake vac to suck out the new ATF out, in the same manner described above, which was not a nice red color due to it mixing with the residual CHS11 remaining in the system.

We then put more AMSOIL ATF back in the system in the same manner described above.

Presto - bright red fluid.

You should change out the power steering fluid every 50k or your probability of changing out a new power steering pump after 100k gets greater.

Last time I checked that part is not cheap.
Appreciate 0
      09-09-2015, 04:35 PM   #73
speedball73
New Member
0
Rep
26
Posts

Drives: 325i Silver (2006)
Join Date: Dec 2011
Location: Canada

iTrader: (0)

Anybody agree with me that the RealOEM diagram in this link http://www.realoem.com/bmw/enUS/show...diagId=32_1569 and the photos on page 1 of this tutorial don't match?

It seems to me that the power steering lines going into the rack are installed the other way (banjo bolt on the bottom). I've looked at this a few times, starting to drive myself crazy so I wanted to check with you guys!

-speedball
Appreciate 0
      09-15-2015, 01:58 PM   #74
Ian_N54
Major
148
Rep
1,078
Posts

Drives: 2008 335XI E90
Join Date: Jun 2015
Location: Ohio

iTrader: (0)

Will a flush make steering a little easier? One thing I'm not crazy about with this car is the firmness of the steering wheel. E90 08 335xi
Appreciate 0
      12-06-2016, 01:36 AM   #75
VP-jiminy
New Member
VP-jiminy's Avatar
United_States
0
Rep
13
Posts

Drives: 2009 328i
Join Date: Jun 2015
Location: MI

iTrader: (0)

Hi guys! Not sure if anyone's still following this thread, but what do you think of the following, even less messier, method for a full flush? This one does not involve removing the banjo bolt or the plastic underpanel at all!

1. Remove the airbox

2. Suck out the fluid from the reservoir

3. Unscrew reservoir from its bracket/attachments

4. Remove the crimp clamps and detach the two hoses at the bottom of the reservoir

5. Dump any old PS fluid that comes out of the lower portion of the reservoir (under the filter) and out of the hoses into a catchpan that you place where the airbox was

6. Install a new reservoir (since you can't change the filter in the old one as it is integrated into the reservoir) and reattach & tighten only the high-pressure line to the cooler, but leave the return line unattached for now.

7. Fill fresh fluid in the new reservoir and turn engine on. (I suppose you could use a floor jack at this point to raise the car just enough to clear the tires off the ground so as not to stress the PS pump)

8. Turn the wheel lock-to-lock intermittently in between pouring fresh fluid in the reservoir as the PS pump circulates old fluid out of the system via the unattached return line, dumping it into the catchpan.

9. When you see that the fluid coming out of the return hose into your catchpan is the fresh light green variety unlike the dirty kind, you know you've flushed out the vast majority, if not all of, the PS fluid.

10. Turn the engine off and attach/clamp the return line to the reservoir. Tighten the reservoir to the bracket and body in its final position.

11. Top up the reservoir as needed, tighten cap, and turn on engine and steering wheel lock-to-lock to purge any remaining air.

12. Get rid of the catchpan and reinstall airbox.

Voilą!! )

Any thoughts?
Appreciate 0
      Yesterday, 12:19 PM   #76
VP-jiminy
New Member
VP-jiminy's Avatar
United_States
0
Rep
13
Posts

Drives: 2009 328i
Join Date: Jun 2015
Location: MI

iTrader: (0)

Vipi?!! Noone?!
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 10:42 AM.




e90post
e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST