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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)

X5only 06-08-2019 12:15 AM

Quote:

Originally Posted by Purplefade (Post 1163815)
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?

I haven't looked, see if there's something here https://www.newtis.info

Wow, what an adventure! Well done on your latest findings:thumbup:

Purplefade 06-08-2019 12:23 AM

That did it! Found it right away, exactly what I was going to do, grab the cam with a large wrench to hold it solid and then break the cam\timing bolt.


I think I'm going to call it a night for tonight. Dieing to know actually... but I'm not putting it back together tonight so I couldn't start it anyway.


Will reset that intake cam in the morning and see how she does from there!


Fingers crossed!

andrewwynn 06-08-2019 09:10 AM

X won't idel after replacing valve stem seals - receiving misfire codes.
 
It's vital to adjust the vanos full CCW (pretty sure that direction) from front before setting the timing. If not you could have the exact situation you discovered since the exhaust is directly tied to the intake but the intake varies based on vanos inside.

It takes a STUPID amount of torque to break the T50 (or is it T55) loose. Much more than what it's set with. I couldn't break it loose with 225 ftlb impact and the T-star was getting stripped by the second time (I had to redo the timing). Make sure you are going righty-loosey if this is M62.

Purplefade 06-08-2019 11:56 AM

I wondered that, being an N62 if this still righty loosey? It seems like it is, to your point I have cranked on this thing in both directions and it IS going to take some force to break - wow!

Have to do a bit of research before I get back at it today, I was assuming this was reverse threaded with the cam turning clockwise but really should be sure before I actually break it...

X5M-ISH 06-08-2019 12:43 PM

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 ;)

SlickGT1 06-08-2019 12:44 PM

Wait. How does timing get out of whack with doing VSS?

How do you even check timing without timing tools ready? Now you have me nervous when my time comes.

Purplefade 06-08-2019 12:56 PM

Quote:

Originally Posted by SlickGT1 (Post 1163830)
Wait. How does timing get out of whack with doing VSS?

How do you even check timing without timing tools ready? Now you have me nervous when my time comes.



I am asking myself the same thing... using the “AGA” tool type how does the timing actually get messed up... I never touched it.

Strangest thing is that I checked the timing twice before I bolted the valve covers on, pretty easy, just set the intake plate on the intake cam and check for flush on the head and then repeat with the exhaust. Again, I checked and double checked, bolted the valve covers down and started the car... with it out of time somehow.

Now I have the VCs pulled and low and behold... I find the bank 2 intake cam out of time. Totally not sure how I accomplished that, at first I thought the cam/timing bolt must have been loose - that said, I can confirm that sucker is TIGHT!

Again, I have no idea how it moved, but it did and now I’m working on fixing that [emoji106]


I wouldn’t sweat it, all in all the job is pretty straight forward, tedious, but pretty straight forward.

You can definitely do it, I would just recommend checking your timing a bit more diligently than I apparently did. [emoji50]

andrewwynn 06-08-2019 01:00 PM

Is the cam actually off or is the reluctor wheel just misplaced. There have been two recent threads where the timing wheel got loose. I thought they were both N62 but I can't remember if it was. Much easier fix if it's just the wheel got mis positioned.

Also: did you ever have timimg tool on the reluctor wheel mid process? I ask because I messed up the timing and had to redo on M62 when I had the timing tool on the reluctor wheel and it self-tightnened during the 720° chain tightening procedure.

Anyhow as long as the intake wasn't too far behind that valves got hit it seems you are quite close to get it resolved.

Oh: HUGE TIP: Hit the T55 sideways with a hammer a little more than a love tap but not like sinking a nail. It will break the "sieze" and takes like 40% less torque to break free. Search yt for an example video. I learned the trick after doing it the hard way about 6-7 times the last 3-4 much easier.


Sent from my iPhone using Tapatalk Pro

X5M-ISH 06-08-2019 01:05 PM

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 you’ve 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. I’ve 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.

Purplefade 06-08-2019 01:05 PM

Cam is actually off, just enough that the timing plate sits about an 1/8 of an inch off the head on the lower side. Will physically need to break the bolt and turn the cam to flatten out the timing plate.

Good call on “smacking” it with a hammer, may just give me the shock I need to get it to break loose and from there - yep, I definitely think that I have found my issue.

I’m now starting to ask myself if it was like that when I checked it and I simply missed it the first go round because I can talk you I cranked myself in to some pretty twisted positions to make double sure this time!


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