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-   -   X won't idel after replacing valve stem seals - receiving misfire codes. (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/110360-x-wont-idel-after-replacing-valve-stem-seals-receiving-misfire-codes.html)

andrewwynn 06-08-2019 01:13 PM

X won't idel after replacing valve stem seals - receiving misfire codes.
 
https://www.newtis.info/tisv2/a/en/e...mshaft/DiHMOp9

No mention of righty-loosey. I think the N62 uses right hand threads on the timing adjustment units. Also crazy different from the M62 looks completely foreign to me. Read the step by step carefully. There is mention of getting the vanos into the start position and that if you can't it's worn out.

The process is quite different than with the M62 but looks maybe more like my M54 but I've not done M54 timing yet.

https://uploads.tapatalk-cdn.com/201...f5e23f3e12.jpg

I love simple directions! Only one step to completion.

Purplefade 06-08-2019 01:52 PM

Quote:

Originally Posted by X5M-ISH (Post 1163829)
Even though you will not bump your own thread, make sure to update your original post with your solution! People WILL stumble upon this thread in an internet search. That would be a HUGE service from you if you can do that for everyone.



Also, for those of us who insisted the timing was off, we tentatively nailed it ;)



Totally agree, when this is all done I will update the original thread with link to this and this thread with a link to that and my detailed findings for sure [emoji106]

I know it drives me crazy when I follow a rabbit hole and never find a resolution.

And yes... as much as it pains me, you guys were right, it was the timing. Rats! But hey, Iím real glad you guys pushed me to check it again before dropping it off at the indy.

I would have been totally disappointed with myself if he called me and said yep, itís the timing [emoji50]

Purplefade 06-08-2019 01:56 PM

Quote:

Originally Posted by X5M-ISH (Post 1163835)
Generally when everything is pulled and your standing there looking at the timing chain(s), cams, VANOS units and all that, you go nuts with zip ties to secure the timing chain(s) in place after youíve locked the crank at proper TDC. This may involve manually turning the crank until you can get the pin in the hole and verify the entire system is TDC. For everything else like the VANOS, cam gears and cams you scribe the metal on non-wear surfaces. Use your smart phone to take smart pictures of you being smart with all your zip ties and scribes and back it up with a few notes on paper.

There is really no rush during these steps so being as thorough as possible allows you to reference your material when you are ready for reassembly. Because parts are under tension and/or pressure they can rotate when you least espect it or by accidentally bumping the wrong thing or accidentally partially disassembling the wrong thing. Your thoroughly done tear down to secure the timing system will mitigate problems.

This is not to fault the OP, but to say that as a home mechanic, anything is possible. Iíve accidentally installed piston rings upside down on 1 of 8 pistons requiring a complete tear down and reassembly. All because of the way I grabbed the parts and layed them on my bench. I did it one time differently and failed to verify before installation. Good times. Strive to lock/scribe everything you can in place and just take your time.



Amen to that! I really thought I had it nailed the first time and stubbornly continued to try and trouble shoot around it... Learned that lesson for sure but it took me completely exhausting every other possibility first.

You can bet I will lock everything in place this time and once I think Iím finished - Iíll check it again just to be sure [emoji106]


Will keep you guys posted!

Purplefade 06-08-2019 02:00 PM

Quote:

Originally Posted by andrewwynn (Post 1163838)
https://www.newtis.info/tisv2/a/en/e...mshaft/DiHMOp9

No mention of righty-loosey. I think the N62 uses right hand threads on the timing adjustment units. Also crazy different from the M62 looks completely foreign to me. Read the step by step carefully. There is mention of getting the vanos into the start position and that if you can't it's worn out.

The process is quite different than with the M62 but looks maybe more like my M54 but I've not done M54 timing yet.

https://uploads.tapatalk-cdn.com/201...f5e23f3e12.jpg

I love simple directions! Only one step to completion.



Thatís what I saw as well, no mention at all of reverse thread. I have a second set of hands coming over now to help me hold the cam while I crack the bolt loose and just to help keep an eye on everything.

Help should arrive any minute and then itís back to the garage until Iím finished.

Will update you again in a few hours [emoji106]

X5only 06-08-2019 03:09 PM

As Andrewwynn pointed out, please pay attention to this detail if you haven't already - confirm the locking of the adjustment unit in its initial position before verifying or adjusting the N62 engine timing:
https://www.newtis.info/tisv2/a/en/e...mshaft/DpNVZpB

"Important!
When the engine is shut down, the inlet and exhaust adjustment unit is normally locked in its initial position.
The situation may arise in some individual cases where this initial position is not reached and the camshaft can continue to be rotated in the adjustment range of the adjustment unit.
In order to avoid incorrect timing adjustment, it is essential to check the locking of the adjustment unit and if necessary perform locking by rotating the camshafts".

Purplefade 06-08-2019 03:34 PM

Adjustment units feel locked, lobs on 5 look good and Iíve broken the intake cam bolt and turned the cam to align it with the special tool. Locked the cam bolt back down and rotated the engine two full revolutions and rechecked the timing - all appears to be spot on now.

Plates sit nice and flat on the head and take no effort to apply or remove [emoji106]

Going to pull everything off the engine now and start reassembly, fingers crossed once sheís all buttoned up she runs this time!

X5only 06-08-2019 03:43 PM

Quote:

Originally Posted by Purplefade (Post 1163844)
Adjustment units feel locked, lobs on 5 look good and Iíve broken the intake cam bolt and turned the cam to align it with the special tool. Locked the cam bolt back down and rotated the engine two full revolutions and rechecked the timing - all appears to be spot on now.

Plates sit nice and flat on the head and take no effort to apply or remove [emoji106]

Going to pull everything off the engine now and start reassembly, fingers crossed once sheís all buttoned up she runs this time!

Perfect, this is exactly what the shop would have done:thumbup: Now take it easy as you reassemble. No rush and good luck:D

andrewwynn 06-08-2019 06:23 PM

Just one step left: "assemble engine"

Purplefade 06-08-2019 06:59 PM

I am sad to report that upon reassembly it started, ran absolutely wonderfully for 30 seconds (heck, I thought it was fixed) and then dropped in to limp mode and threw the same 2A89 dme exhaust vanos 2 code...

Needless to say sheís reassembled and thereís no way Iím tearing it down again to triple check my work.

Sheís scheduled to go to my Indy tomorrow and sadly that is where sheíll remain until she runs again...

All that said, as soon as I know what it took to fix it, I will definitely update this thread so its complete and closed out.

Bit pissed that I wasnít able to solve it, but I think admitting my defeat now and letting her head to the shop will not only save my sanity but my marriage as well [emoji12]

Canít say enough how much I appreciate everyoneís help, you guys rock!!

andrewwynn 06-08-2019 07:50 PM

Since you never loosened the cam bolt I suspect as the TIS mentioned, likely a failure in the vanos unit. At least the Indy has a solid head start where to look. We will all be anxiously awaiting the answer.


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