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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 12-30-2010, 07:54 AM
cn90 cn90 is offline
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Anyone seen a defective Behr Reservoir before (2002 530i)

I saw this thread on another forum, basically a flap inside the bottom connection of the new Behr Reservoir (basically plugged up from the factory), anyone seen this before? This will create a No HEAT condition in the cabin regardless of how many times you bleed the system!

http://bimmerboard.com/forums/posts/847562

http://bimmerboard.com/forums/posts/847577

Quote:
When I got the tank out and turned it upside down I immediately noticed that the hole that takes in the aux. pump hose was not open. I stuck in a screw driver and pushed - the screw driver went in. It looked like I had a flap on the inner edge of the tank's opening. I also noticed that there was something like a burr or material that was holding the flap in place. I filed the burr off but could not get the flap out of the tank. I decided to put my old expansion tank on the car and not risk with the new one again.
Bluebee, when you did the autopsy of your reservoir, did you see any flap?

Last edited by cn90; 12-30-2010 at 09:44 AM.
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  #2  
Old 12-30-2010, 09:29 AM
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MatWiz MatWiz is offline
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I have an old OEM reservoir here. Anybody wants to buy for autopsy purposes?

mw
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  #3  
Old 12-30-2010, 09:31 AM
cn90 cn90 is offline
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MatWiz,

The case in question is an M54 engine with reservoir that has two (2) outlets at the bottom.

My 1998 528i has only one (1) outlet at the bottom.

Last edited by cn90; 12-30-2010 at 09:45 AM.
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  #4  
Old 12-30-2010, 09:39 AM
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MatWiz MatWiz is offline
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Quote:
Originally Posted by cn90 View Post
MatWiz,

the case in question is an M54 engine with reservoir that has two (2) outlets att he bottom.

My 1998 528i has only one (1) outlet at the bottom.
I just snapped this pic for you. 528 2000.



Sent from my IBM 360/20 using punch cards.
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  #5  
Old 12-30-2010, 09:43 AM
cn90 cn90 is offline
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Thanks!!!

Get a screw driver or stick and poke inside each hole, is there a flap?
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  #6  
Old 12-30-2010, 09:58 AM
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Quote:
Originally Posted by cn90 View Post
Thanks!!!

Get a screw driver or stick and poke inside each hole, is there a flap?
It's gonna look like a cheap Bar-Mitzva magic show, but here it goes... Drums....

Ah huh... ??


Tada...


Tada!


LOL


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  #7  
Old 12-30-2010, 10:02 AM
cn90 cn90 is offline
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Thanks for the Bar-Mitzvah show.
So this confirms the bimmerboard thread that the Behr reservoir was defective to start with!

------------
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  #8  
Old 12-30-2010, 10:05 AM
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Jason5driver Jason5driver is offline
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Quote:
Originally Posted by cn90 View Post
Thanks for the Bar-Mitzvah show.
So this confirms the bimmerboard thread that the Behr reservoir was defective to start with!

------------
Sent from my wireless punch card.
So, what is the solution?
What reservoir is best?
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  #9  
Old 12-30-2010, 10:16 AM
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Quote:
Originally Posted by Jason5driver View Post
So, what is the solution?
What reservoir is best?
The one that is not clogged.


Quote:
Originally Posted by cn90 View Post
Thanks for the Bar-Mitzvah show.
So this confirms the bimmerboard thread that the Behr reservoir was defective to start with!

------------
Sent from my wireless punch card.
Send him here to see. Maybe he'll have something to add.

mw
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Last edited by MatWiz; 12-30-2010 at 10:17 AM.
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  #10  
Old 12-30-2010, 10:19 AM
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The first new Behr expansion tank my indy installed leaked at a seam. The second didn't.

I never got to look at it as I was just happy get one that did not leak.
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  #11  
Old 12-30-2010, 10:42 AM
Mark@EAC Mark@EAC is offline
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We have sold many, many a behr expansion tank. I've heard of some splitting at the seam, it may have been geezer I saw mention that in the past not sure. This is the first I have heard of this flap issue though.
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  #12  
Old 12-30-2010, 12:39 PM
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I have a feeling that maybe this guy was talking about the "shelf" that is inside the reservoir, where the floater is attached to.

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Last edited by MatWiz; 12-30-2010 at 12:41 PM.
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  #13  
Old 12-30-2010, 01:00 PM
mmihailov mmihailov is offline
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Hi, I was not talking about the shelf inside the reservoir. I installed a new Behr tank while replacing my radiator and thermostat and drove for a month without heat. I pulled it up yesterday and the flap that I was talking about was sitting on the inner rim of the spout that connects a hose to the aux. pump. The direction of the flow there is out of the tank, so any flap on the inside of the tank would effectively stop any flow. I pushed the flap in and it disappeared somewhere inside. I could not get it out. I think, it might still be there - folded back and clinging to the bottom of the tank on the inside. I also had my original tank and it has no flaps. I think the tank I got is defective. The question is: are there other defective tanks out there as this one, or I was the lucky one.
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  #14  
Old 12-30-2010, 01:05 PM
cn90 cn90 is offline
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mimihailov,

Post a pic of your defective reservoir and exactly what is inside.

Bluebee posted the autopsy of the reservoir here:
http://www.bimmerfest.com/forums/sho...2&postcount=18
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  #15  
Old 12-30-2010, 01:32 PM
pleiades pleiades is offline
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How about this post?
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  #16  
Old 12-30-2010, 01:45 PM
cn90 cn90 is offline
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Lesson to learn: whenever installing any new parts, whether it is spark plugs, oil filter or reservoir, INSPECT them beforehand!
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  #17  
Old 12-30-2010, 01:48 PM
mmihailov mmihailov is offline
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Unfortunately I can't cut the reservoir in half. I am returning it to the store I got it from and getting a new one. I am driving with my old one in the car now. The bluebee link that you posted is what I have. If you turn the tank upside down and look at the two outlets there would be nothing special to see. If you flash a light inside you would not see much either. I have run water through all outlets of my old one and the new one after dealing with the flap. Water flows freely in all directions. The tank is essentially one big empty vessel with some inside walls with holes. I don't understand the intricacies of German engineering, but I am fairly certain that the tank will work even if had none of the walls on the inside. May be some of its compartments are to reinforce it and others to separate the bottom part from the top. Don't know why.
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  #18  
Old 12-30-2010, 01:50 PM
mmihailov mmihailov is offline
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Excellent point, cn90. I came to the same conclusion after enduring a month of freezing cold inside my car.
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  #19  
Old 12-30-2010, 02:02 PM
mmihailov mmihailov is offline
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That is an awesome find, pleiades. Thank you very much. I was beginning to think that the flap I saw in my new Behr tank was an illusion caused by hypothermia from driving my car without heat for too long, but the picture on that post dispels my doubts. I could not take a good look at my plugged up hole because when I stuck a screwdriver and pushed in the flap disappeared inside.
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  #20  
Old 12-30-2010, 02:41 PM
pleiades pleiades is offline
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Hi, did you acquire your Behr tank from a BMW dealership or through an online vendor?

If you get it from the dealer I suspect it doesn't have "Behr" on it anymore but can't be sure.

I haven't read your bimmerforum thread but if this happened to me and I let my car run for a significant time in that shape, I'd declare the aux pump toast and replace it too because it has probably been straining away in a literal vacuum.
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  #21  
Old 12-30-2010, 03:20 PM
cn90 cn90 is offline
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Quote:
Originally Posted by pleiades View Post
...I'd declare the aux pump toast and replace it too because it has probably been straining away in a literal vacuum.
I don't think so, I think the Aux Pump will be fine whether it is pumping air or liquid.
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  #22  
Old 12-30-2010, 03:30 PM
mmihailov mmihailov is offline
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I purchased the tank from www.eeuroparts.com for close to $70. It is a Behr tank. I pulled the aux. pump up and out of the car and ran it just to see if the propeller spins. It worked fine. My car starts blowing warm air couple of min. after I start it and after five more min. blows so much scorching heat when on max. from the vents that I hope everything works well. I think the aux. pump is OK for now. You might be right though - it may have suffered some damage by running on dry for a month. We'll see.

Last edited by mmihailov; 12-30-2010 at 03:33 PM. Reason: incomlete
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  #23  
Old 12-30-2010, 03:33 PM
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bluebee bluebee is offline
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I may be late to the party but I saw cn90's request early this morning but I had an interview to go to so the pictures had to wait.

I see that there are already pics ... but I confirm there is no such flap in my OEM Behr expansion tank.

Both holes have a clear shot through sans obstructions. The only thing that is there is that mysterious black slider which goes over both holes like an upside down cup.

I'm still not sure what that slider does; nor am I certain of its proper position with respect to the black stalk ... so anyone who replaces their expansion tank is asked to cut open that section and tell us what they find.

Here are the pics (now redundant) I took as a response to this query

THIS FIRST HOLE IS CLEARLY UNOBSTRUCTED:


THIS SECOND HOLE IS ALSO UNOBSTRUCTED (SEE THE WHITISH STICK I POKED IN THE BOTTOM FOR THE CAMERA TO SEE DOWN TO):



ABOUT THE ONLY THING IN THE WAY IS THE 'MYSTERIOUS SLIDER' AS CAN BE SEEN BY THIS SIDE VIEW:
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Last edited by bluebee; 12-30-2010 at 03:38 PM.
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  #24  
Old 12-30-2010, 03:52 PM
mmihailov mmihailov is offline
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I admit that the pinned down black box with a hole on the top evokes a serious mystified expression on my face also. Does the box slide or is pinned down?
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  #25  
Old 12-30-2010, 03:59 PM
cn90 cn90 is offline
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Aux Pump is fine, it is NOT fuel pump that needs gasoline to lubricate.
Don't replace your Aux Pump until you have to.
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