2005 E53 4.4i recent purchase (as is) and I am stuck!

[allan01xe]

Good day to all of you, and thank you for allowing me to post on this site. I recently aquired as above a 2005 X5 E53 4.4i. I bought it from a non BMW lot for less than half of the book value. I am a mechanic of sorts, i.e. I have been working on cars for about 35 years, But I will admit this is my first turn at the BMW. I have purchaed the Schwaben Code Reader, and Bentley Manual. I have looked through this site and a few others, and feel that I have a decent understanding of the VANOS and Valvetronic system. With that said, I am stuck. My X5 will start and idle (normally), and I have been able to run it into town, usually if I can keep the RPMs under 2500. But if I go over and sometimes on its own, it will trigger the check engine light, VANOS intake Bank 2, VANOS exhaust bank 2 multiple misefires, and specifically misfire cylinder 5,6,7, and 8. I have removed both VANOS solenoids cleaned them swapped them with each other and also swapped with bank 1, no change. I have swapped the exhaust CPSs no change, I cannot swap the intake CPSs as they are different parts. I have reset, everything I thing I safely can with the Schwaben. no change. I have noticed some changes in the live data, but I am not sure how to react as I have not found anywhere that tells me what the nominal readings are. I have taken good and bad pics of the reader so if any of that would help I can upload it.Keep in mind I love a challenge, and I don't mind getting my hands dirty. But I do not believe in throwing parts (esp. expensive BMX parts) willy nilly hoping for the best. I wish to thank you in advance for your input, and if there is a post that I missed please point me in the right direction. Thanks!!

[Emory39]

CYL 5,6,7,8 is bank two passenger side it might be that the Valvetronic motor (canister looking deal) on the valve cover is going bad. The Valvetronic work like the throttle body that said it operates the intake valve. Check if you could reset adaptation with your scanner and test drive it again. If it occurs, exchange the parts over to the other side reset adaptation and test drive if that is the problem replace both.

***be sure to learn the position from stop to stop*** so that the Valvetronic learn the parameters.

[allan01xe]

Good Day, I have tried to relearn the Valvetronic system with no change, I think I will try swapping the motors to see, although I am not seeing a specific error in the Valvetronic system, other than it goes into Limp Home Mode upon the other codes being set.

[allan01xe]

I did swap the Valvetronic motors, with no change, still bank 2....

[Emory39]

That's all I got from reading your description furder diagnostic will be needed possibly remove the valve cover to check out if there is something weird physically on that bank. If you decide to remove it be careful with the Valvetronic sensor its stay with the head.

[allan01xe]

Sorry for a slow reply, but I do hate it when I read a forum and the answer is never found.

Through conversations on other sites I have found that at least the intake cam is off by 27° and will know more on e I get the alignment tools. Thank you your thoughts and suggestions!

[peter2772000]

How does a cam get off-indexed by 27*, unless the belt or chain jumped a tooth?

[allan01xe]

How does a cam get off-indexed by 27*, unless the belt or chain jumped a tooth?

That suspicion is shared, there was evidence of leaking at the snowman seal, and with talking to someone on a different forum, the believed conclusion is that a possible loss of oil pressure caused by the leaking seal, and/or possibly a faulty tensioner (which I have also changed) should be the culprit. 27* is only one or two teeth off and since the VANOS adjusts the cam based on the readings at the CPS, it has probably been self correcting for a while.

[peter2772000]

Makes sense. Try posting your issue on the site below, as it seems to have much more traffic and there are master BMW techs that frequent/comment on it often.

https://www.xbimmers.com/forums/index.php

[allan01xe]

Makes sense. Try posting your issue on the site below, as it seems to have much more traffic and there are master BMW techs that frequent/comment on it often.

https://www.xbimmers.com/forums/index.php

Thanks, but there is no thread on that site for an old E53, lol