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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 06-19-2013, 01:48 PM
pastman pastman is offline
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Unhappy Power steering fluid is low

Hello Members:

Mylocal Valvoline oil change just informed me that the power steering fluid level is at minimum (2007 328xi coupe - 98K). They explained that the reservoir is attached by a crimping device rather than a regular clamp, I have a slow leak.

I've read (on the net) that I should replace all of the fluid and the reservoir receptable and filter. Please give me your thoughts (and experience) on the subject

Thanks,

Al
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  #2  
Old 06-19-2013, 01:55 PM
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thekurgan thekurgan is offline
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I'm not sure on the 328s, but some of the newer reservoirs have a built-in filter that cannot be serviced. If there is a leak, and the host/clamp is replaced, a drain/fill is warranted.
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Old 06-19-2013, 02:02 PM
pastman pastman is offline
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Hello there "Kurgan":

Thanks for the quick reply and helpful info. PS: Wasn't the Kurgan Duncan McLeod's nemesis in 'Highlander'?

Thanks again for the help
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Old 06-19-2013, 02:40 PM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by pastman View Post
Hello there "Kurgan":

Thanks for the quick reply and helpful info. PS: Wasn't the Kurgan Duncan McLeod's nemesis in 'Highlander'?

Thanks again for the help
Kurgan was Connor's nemesis.

Duncan didn't appear until the Canadian-based TV series; he was Connor's cousin.
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Old 06-20-2013, 07:47 AM
jburke4689 jburke4689 is offline
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minimum at 98k is most likely evaporation though the small vent in the reservior cap. Look at it and it will be dirty. I would clean it up and top it off. If you are going to flush and change the fluid then get a new reservior and clamps.
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Old 06-20-2013, 09:18 AM
pastman pastman is offline
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Hello jburke:

I appreciate the feedback, thanks. Do I have to use BMW specific fluid?

Alan
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Old 06-20-2013, 09:19 AM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by pastman View Post
Hello jburke:

I appreciate the feedback, thanks. Do I have to use BMW specific fluid?

Alan
I "believe" it's Pentosin CH-11S, but someone else may know more.
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Old 06-20-2013, 12:56 PM
Ilovemycar Ilovemycar is offline
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Kurgan is correct per usual. That one is for our hydraulic, I don't know why anyone would consider non OEM when it's maybe $20 for the container. The newer electric systems need to use a different fluid.
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Old 06-20-2013, 01:43 PM
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thekurgan thekurgan is offline
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Originally Posted by Ilovemycar View Post
Kurgan is correct per usual. That one is for our hydraulic, I don't know why anyone would consider non OEM when it's maybe $20 for the container. The newer electric systems need to use a different fluid.
Yes my bad, I kept thinking n54/n55:


http://www.ecstuning.com/BMW-E90-328.../Fluid/ES1802/
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Old 06-20-2013, 02:20 PM
jburke4689 jburke4689 is offline
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The type you need is on the cap of the reservior. You can get it at any NAPA. But it does need to be what is on the cap. Petosin is the most common.
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Old 06-20-2013, 03:15 PM
Pilgrim Pilgrim is offline
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Keep it filled until fixed. You do NOT want it running dry!
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Old 06-20-2013, 04:03 PM
Ilovemycar Ilovemycar is offline
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Quote:
Originally Posted by thekurgan View Post
Yes my bad, I kept thinking n54/n55:

http://www.ecstuning.com/BMW-E90-328.../Fluid/ES1802/
Hm! You know what, I recently watched a YT video by "AskTheCarExperts" that was working on a BMW X3 with N52 engine, and the cap and container were clearly marked with CHF 11S. If your correction is correct, well I guess I really can't assume anything at all... I thought if both the N52 X3 and N54 335i used CHF... OP, check the cap!
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Old 06-20-2013, 04:25 PM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by Ilovemycar View Post
Hm! You know what, I recently watched a YT video by "AskTheCarExperts" that was working on a BMW X3 with N52 engine, and the cap and container were clearly marked with CHF 11S. If your correction is correct, well I guess I really can't assume anything at all... I thought if both the N52 X3 and N54 335i used CHF... OP, check the cap!
I was confused too, CHF 11S is really common. On both the M3s, I did the turkey baster replacement with it and it was on the cap. If someone can check their cap, that would be helpful. I'll check realoem and see if there is any information.

Edit:

penske shows the fluid listed here for the E90 328xi: http://www.penskeparts.com/DiagramsM...8&rnd=03192010

CHF 11S is listed

Click the steering section:
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Last edited by thekurgan; 06-20-2013 at 04:29 PM.
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  #14  
Old 06-20-2013, 04:38 PM
Ilovemycar Ilovemycar is offline
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Nice due diligence^!
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