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BMW E53 X5 2000 and later (Sport Activity Vehicle) Crankcase vent valve


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Last Post: Jul 5, 2012 9:44 AM Last Post By: archebald23
bimmerguyx2

Posts: 3
Registered: 03/04/08
Crankcase vent valve
Posted: Mar 4, 2008 4:48 PM
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What is involved in replacing the Crankcase Vent Valve on a 2003 X5. The dealer wants about 1K to change. What steps are involved in this repair? Any information will be very much appreciated.
5800

Posts: 21
Registered: 09/19/07
Re: Crankcase vent valve
Posted: Mar 4, 2008 5:54 PM   in response to: bimmerguyx2 in response to: bimmerguyx2
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I just read something about this that terrified me, and lead to some interest of my own.
It involved a cracked engine block do to precipitation build up in the motor.

The crankcase vent valve ( crankcase breather system) can freeze in very low weather conditions do to water build up? Or something like that; and has happened in other BMW models.

I don't feel this is a hard job to do (if you have worked with car motors before and have your own tools); and it looks to be a straight remove and replace (RR) job.

I just got this Web address (realoem.com) from BMW Northwest, my locale dealer; and this is out standing info to have in my book. It shows you all the parts involved with that area of interest and gives you OEM part numbers and prices.

With this and the new X5 book from Bentley; you should be good to go.

Hope this helps. (Drive Fast).
bimmerguyx2

Posts: 3
Registered: 03/04/08
Re: Crankcase vent valve
Posted: Mar 4, 2008 7:45 PM   in response to: 5800 in response to: 5800
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You are correct. I've been told of damaged heads, cracked blocks and I actually saw one where the oil input cap was blown off and the valve cover damaged. So, it is definitely a potential problem. The problem can be identified by a watery brown muck build-up on the inside of the oil fill cap and valve cover, at least that is what was shown to me. I have just ordered the Bentley book for the X5, which I hope will walk me through the repair,and,looking at the picture at realoem, the repair should only include removal of the air intake housing and tube to get at the valve and tubes. Should be around $100 do it yourself repair. Thanks for the guidance and info.
5800

Posts: 21
Registered: 09/19/07
Re: Crankcase vent valve
Posted: Mar 4, 2008 9:00 PM   in response to: bimmerguyx2 in response to: bimmerguyx2
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WOW!
Someone told me there is not much oil moved around in the top valve cover of 3.0 X5 motors (and others like it); and that precipitation and what little oil that gets up there is easily emulsified and not uncommon to find?. The inside of the valve cover will tend to glaze up there as well but; I wonder if that's do to longer oil service intervals or from the crankcase?

Either way, I hate that yellow sludge and wipe it off from underneath the edge of the valve cover opening as much as I can. Also, 3000 mile oil changes (or less) should be a big help, but; changing the parts you mentioned is a good idea and cheep insurance as well. I have been thinking of changing these parts and cleaning out the valve cover to get a fresh start with watching this.

You are right about removing the air intake; I just replace the plenum boot that comes off the throttle body and all the parts you want are right there. The Bentley repair book is out standing!

What made you decide to change these parts anyway?
bimmerguyx2

Posts: 3
Registered: 03/04/08
Re: Crankcase vent valve
Posted: Mar 4, 2008 10:13 PM   in response to: 5800 in response to: 5800
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I took the X in to the dealer to get the annual oil change. . . that's all that's recommended. The mechanic explained the problem to me. What I didn't understand is why no one alerted me to the problem before. This guy did. Like you, I've just wiped off the goo after each oil change over the last 2 or three years. I also saw it about every six months when I added about 1/2 quart of oil. To be safe, I think the part replacement is a good precaution. . .but definitely, do it yourself. Also, he recommended changing the connection line and the vent pipe because they usually become affected from the heat, etc. Good luck!
dj oxo

Posts: 3
Registered: 04/29/09
Re: Crankcase vent valve
Posted: Apr 29, 2009 5:26 PM   in response to: 5800 in response to: 5800
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hi there ive just joined up and have been reading your thread which mentions the x5 repair book, does it cover the 3.0 diesel
regards
dave
Charlie

Posts: 4,776
Registered: 12/09/03
Re: Crankcase vent valve
Posted: Apr 30, 2009 8:13 AM   in response to: dj oxo in response to: dj oxo
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Does not cover diesel. We never got the diesel X5 here in the states.
audimess

Posts: 59
Registered: 10/08/04
Re: Crankcase vent valve
Posted: Jun 15, 2009 9:54 AM   in response to: bimmerguyx2 in response to: bimmerguyx2
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Hahaha. Welcome to the world of BMW 3.0.
There should be a recall or class action lawsuit against BMW on this one. Poorly engineered to begin with, and the so-called "updated" oil separator unit is simply BMW putting foam over the original unit and lines and charging owners $1,000. What a deal that is. A $47 part and $2 for foam--$950 labor. That foam works real well too. Ask me how I know. If you live in the northeast, or somewhere where there is winter, you will have to do this every winter. Ask a tech how many of these they do when winter comes.
The techs say you can avoid it by driving an hour a week on the interstate--i.e. get the engine hot enough to burn off the water. I've never seen the sludge in the summer. But getting the car up to operating temp isn't good enough. A 30 minute drive isn't enough. I've had oil hydrolock once, that's a real treat. That's when the oil separator valve freezes and all the crankcase oil gets diverted into the combustion chamber. There's so much smoke out the back you think the car is on fire.
Want to avoid the problem? I suppose you can trade in your 3.0 for a v8. Or you can keep your 3.0 X5 in a heated garage in the winter. Or you can park it for the winter and drive something else. Or we can hire an attorney and force them to fix it right. Some kind of electrical heating element in the valve and lines should prevent it from freezing.
archebald23

Posts: 14
Registered: 07/14/10
Re: Crankcase vent valve
Posted: Jul 30, 2010 3:38 AM   in response to: 5800 in response to: 5800
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a fellow experienced this first hand. below freezing weather his truck puked oil out of gear shift seal. This was due to what dealer, under warranty told him , crankcase breather froze up & pressurized crankcase.

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