Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #51  
Old 05-09-2020, 02:13 PM
Member
 
Join Date: May 2020
Location: Sweden
Posts: 21
murmansken is on a distinguished road
Well seems like the guide has snapped or a chunk came loose from it. Look at the tensioner itīs on the backside of the guide therefor it was possible for it to chew threw the solenoid. Interesting fault acctually. This could have been a lot worse with broken valves and severe damage on pistons.
Attached Images
  

Last edited by murmansken; 05-09-2020 at 04:21 PM.
Reply With Quote

Sponsored Links

  #52  
Old 05-09-2020, 10:29 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,817
andrewwynn will become famous soon enough
Wow I was prepared to see much much worse. Looks very recoverable.



I was surprised to see any of part #7 at all.



Looking at the reference photos looks like you just had the ala M62 chain guide self destruct where the plastic shoe portion shattered and went into the oil sump.

I would be willing to bet the tensioner was the cause though.

Do you know if the tensioner was replaced with the chain/guides? Havimg done a couple guide replacements, I'm betting if you aren't changing the chain you could probably change the guides without redoing the timing. (if vanos left cogged to the chain you shouldn't need to re-set the timing) just thinking out loud.

Keep posting I'm rooting for you I am quite sure you caught this just in time to save the engine and it's not a huge fix from this point.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #53  
Old 05-10-2020, 02:55 AM
Member
 
Join Date: May 2020
Location: Sweden
Posts: 21
murmansken is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
Wow I was prepared to see much much worse. Looks very recoverable.



I was surprised to see any of part #7 at all.



Looking at the reference photos looks like you just had the ala M62 chain guide self destruct where the plastic shoe portion shattered and went into the oil sump.

I would be willing to bet the tensioner was the cause though.

Do you know if the tensioner was replaced with the chain/guides? Havimg done a couple guide replacements, I'm betting if you aren't changing the chain you could probably change the guides without redoing the timing. (if vanos left cogged to the chain you shouldn't need to re-set the timing) just thinking out loud.

Keep posting I'm rooting for you I am quite sure you caught this just in time to save the engine and it's not a huge fix from this point.
Well I think I need to change the chains and guides and tensioners, i guess I have to redo the timing to. I have the tools so not a big problem.
Reply With Quote
  #54  
Old 05-12-2020, 03:29 PM
Member
 
Join Date: May 2020
Location: Sweden
Posts: 21
murmansken is on a distinguished road
Finally I have some stuff loose to see what has happened on drivers side I actually found the piece that was missing and im wondering if I could have broken it when I took the valve cover apart.

On the passenger side the timing chain seems to have streched. Propably faulty tensioners to and has started to chew about 1 mm on the solenoid not that much but enough make me wonder if there has been cheep china shit chains in this beamer. Both tensioners are bmw oem. I donīt know if they changed the tensioners but the spring in them has verry little pressure.

Im taking down the oil pan another day and has to do a pick list of parts I could need. Did a leakdown and I dont have any bent valves, but it was hard do do because the timing is a bit off...

I sure as hell caught this just in time.
Attached Images
 
Reply With Quote
  #55  
Old 05-22-2020, 02:08 PM
Member
 
Join Date: Nov 2013
Location: Canada
Posts: 7
JeffC is on a distinguished road
In your pic above, the alternator bracket is in place. Don't you have to remove it to get the cover off?

That looks like a lot of chain stretching.
Reply With Quote
  #56  
Old 05-22-2020, 02:25 PM
Member
 
Join Date: May 2020
Location: Sweden
Posts: 21
murmansken is on a distinguished road
Quote:
Originally Posted by JeffC View Post
In your pic above, the alternator bracket is in place. Don't you have to remove it to get the cover off?

That looks like a lot of chain stretching.
The alternator bracket is loose had to pry it a little to get the chaincover loose. But you need to dissasemble subframe & front diff to remove the oil pan. Yes the chains are stretched a lot. Had a huge amount of luck that the valves didnt get bent.
Reply With Quote
  #57  
Old 05-22-2020, 03:03 PM
Member
 
Join Date: Nov 2013
Location: Canada
Posts: 7
JeffC is on a distinguished road
OK. So you do have to loosen the front diff and release the bolts on the side of the engine mount bracket. I was hoping you found a better trick

FYI.
The old timing guide have been superseded by newer and longer ones on CYL5-8. So is the lower plastic one in CYL1-4.

I am wondering if the "stretch" is because the material that the chain is sliding on has broken off or is it really the chain.

Also saw the the lower timing guide on CYL5-8 has its tip broken off. This is the 4th N62 with the old style timing guide I've seen that has the tip broken off.

Removing and replacing guides on CYL1-4 is a pain as they do not fit without surgery.
Reply With Quote
  #58  
Old 05-22-2020, 03:14 PM
Member
 
Join Date: May 2020
Location: Sweden
Posts: 21
murmansken is on a distinguished road
Quote:
Originally Posted by JeffC View Post
OK. So you do have to loosen the front diff and release the bolts on the side of the engine mount bracket. I was hoping you found a better trick

FYI.
The old timing guide have been superseded by newer and longer ones on CYL5-8. So is the lower plastic one in CYL1-4.

I am wondering if the "stretch" is because the material that the chain is sliding on has broken off or is it really the chain.

Also saw the the lower timing guide on CYL5-8 has its tip broken off. This is the 4th N62 with the old style timing guide I've seen that has the tip broken off.

Removing and replacing guides on CYL1-4 is a pain as they do not fit without surgery.
I did find a better trick Removed all bolts except one, the one behind the front diff I released until it touched the diff then I gently pryed the alternator bracked a bit to get the cover out. Going to change both timing chains guides and tensioners. I have found more plastic pieces in the oil pan probably from a previous breakdown. Itīs a serious amount of work to do on this v8:s... If I ever do this again im pulling the engine out. Or atleast remove the subframe directly.
Reply With Quote
  #59  
Old 05-22-2020, 03:26 PM
Member
 
Join Date: Nov 2013
Location: Canada
Posts: 7
JeffC is on a distinguished road


Since you are this far deep into this teardown, if they have not been changed before, I would suggest you consider changing the alternator bracket gasket (12317507808) and the coolant pipe (11141439975).

After all this, you'll have a bullet proof X5.
Reply With Quote
  #60  
Old 05-22-2020, 03:30 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,817
andrewwynn will become famous soon enough
I've never seen a chain stretch significantly. Please take a picture.



This is a 180,000 mile chain from M62.

Since only one chain it's much longer and this one is only maybe 7-8mm longer out of close to 2000mm.

If the chain actually stretched It would be the first time I've ever seen it.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 03:39 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
Đ 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.