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Valvetronic Motor Seal Replacement
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10-30-2013, 12:27 AM | #1 |
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Valvetronic Motor Seal Replacement
Hi All,
I went to the dealer for something unrelated and they said the valvetronic motor seal is leaking. I have a pool of oil in the crevaces of the valve cover by the injectors and it does look a bit soiled by the valvetronic motor. Dealer said the Valve cover has to be removed to get to that seal. Can anyone confirm? It looks as though it should be changeable by removing the motor. |
10-30-2013, 03:32 AM | #2 |
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They aren't trying to pull a fast one on you if that's what you're asking. If you've got oil pooling up then its a sure sign that they need to replace the valve cover gasket and related seals. It's not a difficult job for the mechanically inclined (I work on F-16's so nothing with these cars really phases me anymore) but if you aren't a wrench turner or have some friends that know their way under the hood, leave it to the professionals.
Quick search on Google (Google Magic FTW) resulted in this: http://www.turnermotorsport.com/p-18...4-30i30si.aspx So you could DIY if you felt inclined to save some money.
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10-30-2013, 08:25 AM | #3 | |
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10-30-2013, 08:35 AM | #4 |
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And this:
http://www.e90post.com/forums/showth...c+Valve+sensor If this is the problem you are having yes, you do need to actually remove everything like the dealer said. Looks like a lot of work. |
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10-30-2013, 09:25 AM | #5 |
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Ignore the rest of the people in this thread, they obviously haven't done this job and don't know what they're talking about. The "crevices" the dealer is speaking of are above the valve cover gasket, it would be some trick if a leaky VCG was causing oil to pool there. valvetronic motor gasket would definitely do it. Eccentric shaft sensor is a different issue entirely; BUT be careful when you're doing this repair because if you remove the valvetronic motor incorrectly then you can damage the eccentric shaft sensor and you will have to pull off the valve cover.
It is true that if you are changing the valve cover gasket you will also need to change the valvetronic motor gasket, however the opposite is not true. The valvetronic motor gasket sits between the valve cover and the valvetronic motor; it can be accessed by popping the engine cover off, removing the screws holding the wiring harness in place, removing the screws that secure the valvetronic motor and then carefully unscrewing the valvetronic motor. There is no need to remove the valve cover. It's actually a very easy DIY job, I'll do some searching around today to see if I can find some pictures to help you. Feel free to PM me if you've got a questions. |
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10-30-2013, 04:44 PM | #6 | |||
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Thanks. I believe I have seen this before. Quote:
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I have the bentley manual and I reviewed the process for taking the motor out. Turn clockwise until you feel tension from the shaft then turn counter clockwise and pull it out. It just doesn't say that the seal is accessible after that. I am guessing I should be able to see it there and be able to pull it out. Any further feedback about that would be appreciated. |
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10-30-2013, 11:27 PM | #8 | |
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Good luck sir.
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Standing Mile Record Holder for Xi over a mile high: 168.2MPH @ 5512'; The Colorado Mile hosted by The US Mile. |
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10-31-2013, 07:34 AM | #9 | ||
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10-31-2013, 04:07 PM | #10 | |||
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11-02-2013, 06:07 PM | #11 | |
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Quote:
If you had to have the eccentric shaft sensor replaced due to failure or oil contamination then you would have to take the valve cover off and of course replace the valve cover gasket... |
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11-16-2013, 07:15 PM | #12 |
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I changed out the valvetronic motor seal with the valve cover on as numerous people have stated. One issue I ran into is that the E8 head needed to take off the 3 bolts that hold the motor on was too big so I had to get a smaller one for a 1/4 drive and an adapter to fit my 3/8 drive.
Now, I want your advice, the SA at the dealership said I needed to take off the valve cover and quoted me for the work to do that nearly $1000 or more. Should I have him send me that in writing and then tell him I did it without it or take that and send it to BMW Canada? |
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11-16-2013, 09:22 PM | #13 | |
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11-16-2013, 10:03 PM | #14 |
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youre probably right. Only thing is that it is literally 2 or 3 lights down from my work and so convenient. My CPO is ending in January. There is oil in the eccentric shaft sensor and I want to see if I can get it covered. Also, my lifters were changed about 1.5 years ago. Shouldn't the seal for the valvetronic have been covered under that?
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11-18-2013, 07:33 AM | #15 | |
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EDIT: After I re-read the thread, it appears you had two separate problems going on. Either your SA did a very poor job of explaining it to you or you just misunderstood, regardless, separate symptoms equal separate problems. If there was grime around the valvetronic motor/top of the engine then it was coming from the valvetronic motor gasket. If there is oil in the eccentric shaft sensor then it needs to be changed, which does require the valve cover to be removed. Doing the fix for the eccentric shaft sensor would actually involve changing both gaskets, but I still wouldn't pay $1k+ to have someone fix it. The valve cover gasket is around $60 and the aluminum screws (if required) are about $27/set, then you're just looking at an afternoon's worth of work with the right tools. Last edited by fravel; 11-18-2013 at 04:49 PM.. |
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11-19-2013, 11:09 PM | #16 | |
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I think you are right. The SA looked new. I think the tech probably told him that the valve cover needs to be replaced to change the sensor and he misunderstood that to mean the valvetronic motor seal. I had asked him a few times because it didn't appear logical or even necessary just looking at it. I will probably just follow up and let him know so he has an idea. THere is a minimal amount of oil in the sensor. I am confident I can change it out if need be but I rather not do it until necessary. |
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