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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

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 07-19-2010, 10:30 AM
Mudbone Mudbone is offline
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DISA Valve O-Ring

Can the o-ring on the DISA valve be replaced? RealOEM does not show a part number.

Mine is leaking. The o-ring, which should protrude, is actually concave.

Has anyone had any luck removing the o-ring? I began trying to get mine out and found that it is very hard and brittle.

I don't like the idea of applying a sealant OR buying a new valve. This o-ring should be replaceable.

Thanks!
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  #2  
Old 07-19-2010, 10:38 AM
cn90 cn90 is offline
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Please post pic of the O-ring that you refer to.
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Old 07-19-2010, 11:52 AM
Mudbone Mudbone is offline
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see the attached picture
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  #4  
Old 07-19-2010, 12:09 PM
poolman poolman is offline
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From what I have gleened from studying mine--it can't be replaced. Now on how to seal it. This is what
I did sometime back--Advance Auto or your favorite parts store should have gasket making material.
Buy a sheet or two of it , it's cheap. Next with a good pair of sizzors and Xacto knife set--cut out a gasket
to fit the Disa valve--mine required two layers before I was satisfied, it worked great for sealing the air
leaks afterwards.
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  #5  
Old 07-19-2010, 12:18 PM
cn90 cn90 is offline
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poolman is right.

Any hardware store sells rubber gasket sheet that plumber uses to make seal.
A 8"x8" sheet is about $4-5.
Make a template and cut to size.

Another option is to bring the DISA Valve to a plumbing shop and see if they can match the size.

Or measure the exact size (I.D., thickness) and match it up with a generic O-ring:
http://www.lutzsales.com/oring.asp

Last edited by cn90; 07-19-2010 at 12:21 PM.
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  #6  
Old 07-19-2010, 12:30 PM
Mudbone Mudbone is offline
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Do you know what temperature this area is exposed to? It will be important in selecting an o-ring material.
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  #7  
Old 07-19-2010, 12:39 PM
cn90 cn90 is offline
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Quote:
Originally Posted by Mudbone View Post
Do you know what temperature this area is exposed to? It will be important in selecting an o-ring material.
The last time I measured the underhood temp during a very hot day (100F last summer), it was 180F or so.

Off-topic: I am going down to your area Savannah GA next week. I sent you a private message re what areas to visit and what areas to avoid (in terms of areas to avoid and places to visit).

Last edited by cn90; 07-21-2010 at 06:47 AM.
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  #8  
Old 07-19-2010, 02:02 PM
poolman poolman is offline
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You want an 0 ring that will seal the part---find the 0 ring to a 64 ford galaxie 427 R code car--the one with
2 four barrel carbs--you want the 0 ring that goes to the fuel filter on that perticular car--works great
for sealing the disa valve---I happened to have a spare and found it worked great for this application
good luck though in finding the part.
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  #9  
Old 07-21-2010, 03:42 AM
Mudbone Mudbone is offline
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Poolman,

How did you get the existing "orange" o-ring out? Did it come out intact or did you have to dig it out in pieces?

Thanks!
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  #10  
Old 07-21-2010, 05:50 AM
poolman poolman is offline
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I didn't remove the 0 ring--the problem with the vacuum leaking from the Disa valve is the seal between
the valve and the intake --where they mate up--there's where I addressed the problem
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  #11  
Old 08-13-2014, 11:13 AM
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bluebee bluebee is offline
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See also:
> E39 (1997 - 2003) > Complete list of all o-rings (by size & by part number) to buy when ordering parts
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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