Z3MCoupe.com Forums

Go Back   Z3MCoupe.com Forums > M Coupé Technical > Technical Discussion
HOME Gallery Register Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 15-01-2015, 07:07 PM
Dave P's Avatar
Dave P Dave P is offline
Administrator
 
Join Date: Dec 2008
Location: Cheshire
Posts: 22,439
Default Vanos bolt length?

Does anyone know the correct length of the vanos bolts which should have been fitted by BMW dealers after the recall on S50 engines?

realoem lists them as part number 07119900677 but not sure if these are the originals or longer replacements?

http://www.etk.cc/bmw/EN/search/sele...CE/11/11_1575/
__________________
Reply With Quote
  #2  
Old 16-01-2015, 05:48 PM
JuhaV JuhaV is offline
Senior Member
 
Join Date: Oct 2012
Location: Finland
Posts: 199
Default

Dave,

In my garage I just checked a set of bolts that I believe were the OEM ones. Those were all M5X20.

I have replaced them years ago with higher strength 10.9 bolts supplied by http://www.mrvanos.com/E36-M3-S50-B3...1848237%29.htm

However, as those bolts are now in my current Vanos unit replaced about a month ago, I cannot confirm what lenght they are. This current unit was Rolls Royce factory rebuild unit and it had all new cover bolts but they did not look high strength 10.9 bolts. Therefore, I replaced them with those 10.9 bolts from my old unit.

I checked the new bolts taken from the factory serviced unit and they were also M5x20.

I further measured the depth of the holes in the Vanos. They seem be about 26 mm deep. It seems that they could accept M5x25 with a washer that will reduce the bolt length approximately 0.5 mm. If the 25 mm bolts would not bottom up without a washer, then it would be safe to tighten them up with the washer.

Are you sure that the BMW "official" replacement bolts are really longer than the 20 mm originals ? Or do they just have the higher 10.9 strength ?

Hopefully this helps.

br, Juha
__________________
The older I get, the faster I was ...
BMW Z3 M Coupe - Cosmosschwartz Metallic
Reply With Quote
  #3  
Old 16-01-2015, 06:53 PM
JuhaV JuhaV is offline
Senior Member
 
Join Date: Oct 2012
Location: Finland
Posts: 199
Default

Sorry, I gave incorrect info above regarding the bolt strengths !

The bolts in the original Vanos were 10.9 M5x20. I do not know whether a recall replacement of these bolts were done or not.

The bolts in the factory serviced Vanos unit were also 10.9 M5x20.

The bolts from Mr. Vanos were 12.9 instead 10.9. Cannot verify the length without removing one of the bolts.
__________________
The older I get, the faster I was ...
BMW Z3 M Coupe - Cosmosschwartz Metallic
Reply With Quote
  #4  
Old 17-01-2015, 07:48 AM
Dave P's Avatar
Dave P Dave P is offline
Administrator
 
Join Date: Dec 2008
Location: Cheshire
Posts: 22,439
Default

Quote:
Originally Posted by JuhaV View Post
Dave,


Are you sure that the BMW "official" replacement bolts are really longer than the 20 mm originals ? Or do they just have the higher 10.9 strength ?

Hopefully this helps.

br, Juha

not sure always thought they were longer and stronger?
__________________
Reply With Quote
Reply

Tags
vanos

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

Forum Jump


All times are GMT. The time now is 04:15 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2018, vBulletin Solutions, Inc.