X won't idel after replacing valve stem seals - receiving misfire codes.

[X5M-ISH]

Stupid question: the truck has oil in it? Oil pressure is good? VANOS needs oil pressure to function. There is also a possibility that you damaged that particular VANOS when you removed it. Such as it was ‘just’ worn out enough that when you pulled it out that was enough to work it out of spec.

[Purplefade]

Originally Posted by X5M-ISH

Stupid question: the truck has oil in it? Oil pressure is good? VANOS needs oil pressure to function. There is also a possibility that you damaged that particular VANOS when you removed it. Such as it was ‘just’ worn out enough that when you pulled it out that was enough to work it out of spec.

I thought that also, maybe it just gave up the ghost so I tried swapping the intake for the exhaust solenoid and then even went as far as swapping bank 1 for bank 2.

Had a had a bad solenoid I would have expected my issue to follow the bad part, but it did not. Everything I have done has resulted in me working myself in a full circle right back to the original exhaust Vanos 2 error.

Having looked at everything multiple times now I am starting to think that I need to go back to the timing and start over there. I wouldn’t think it was possible but I’m special... so maybe with my luck I got it 180 out or something.

[Purplefade]

Sunday morning update - strangest thing happened:


- Turned the key
- Truck starts
- Idles rough for about 15/20 seconds and then sets in to a nice, smooth idle, no miss and no SES light


- BUT I can't touch the throttle, the instant I touch the throttle it acts like it wants to die
(But as soon as I lift my foot it sets right back in to a nice, smooth idle and still no SES)



- And I still have active code 2A89 DME: Exhaust Vanos 2 (But no SES??)

[X5only]

See post 42. I'm not saying that's definitely your issue, but need to consider it carefully as the error code is the same as what you're consistently getting now - 2A89, and engine goes into limp mode when accelerated above idle.

https://xoutpost.com/bmw-sav-forums/...isfires-5.html

Had below CEL- Rough idle, car would go into Limp mode when motor under moderate load.

- 2A89: CDKAMWS2: outlet/exhaust vanos 2: camshaft adjustment has not reached retard/late position (Signal or value below threshold)
- 2A84: CDKENWS2: intake/inlet vanos 2: Limit stop adaptations out of valid range (Signal or value below threshold)

Tired but did not correct issue
- Swapped all vanos solenoid with known working ones bank 1 and 2
- DME Ram Backup via toolset32
- Swapped CPS sensors with known working ones bank 1 and 2

Issue Solved
- CAMS needed to be re-timed - BMW Tool needed (Possible out of alignment from prior shop doing valve stem seals)

[SlickGT1]

I don’t know why no one mentioned this yet. Or maybe I missed it. But disconnect the maf. And try again.

I’m more inclined to say you have a vacuum leak by the way.

[X5only]

Yes, he already mentioned that in his first post "NOTE – unplugging the MAF it idles “better”, marginally, but I still have the misfire codes."

May be he should also clean it with CRC MAF cleaner? And do a smoke test to verify engine is sealed properly.

[Purplefade]

I do have some CRC MAF cleaner, bought it specifically for this job!

Not a bad idea, going to pull MAF and clean and retest. Then I think I am going to pull and clean the Vanos solenoids just to be anal retentive... and retest.

Considered smoke testing for vacuum leak... but I really didn’t touch anything but the vc gaskets... for the most part.

[SlickGT1]

any updates?

[Purplefade]

Pulled the MAF and both Vanos in Bank 2 and cleaned them thoroughly, reinstalled and no change.

I have it scheduled to go over to my Indy on Monday if I don’t have it running this weekend.

He suggested as did I find a handful of posts online that it may need a DME Ram Backup to reset it that sitting with the battery disconnected for so long may have caused it to don”weird things”...

I started a thread last night about DME Ram
Backup, I have INPA running with Tools 32 but I am unable to find the correct .grp files to access my DME.. or I would totally give it a shot.

[Purplefade]

I will be damned!


I pulled the valve covers and the intake cam on bank 2 is retarded - its is not the exhaust cam that is advanced. I can only assume that it takes its base reading from the cam and therefore thinks the intake cam is right, making the exhaust advanced.


Anyway, I have it apart and have verified timing on both banks, bank 1 was spot on and bank 2, exhaust was spot on and intake was retarded...


I realize its 80nm\59 ft lbs, but how hard should I have to wrench on that cam bolt to break it loose?