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
  #1  
Old 02-23-2019, 11:52 AM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 200
Oldmactech is on a distinguished road
Exhaust manifold stud issue

Doin a head gasket and in removing the exhaust manifolds every one of the studs came out of the head. Iím about to reinstall the head and manifolds and have been soaking the studs in PB Blaster to get the nuts off (at least some of them).

I pinched one in a set of vice grips and used a bit of sandpaper to get a better grip but still wound up slightly galling the threads to get the nut loose. Need a good tip on getting a good grip on the stud o I can twist the nuts off without messing up the threads.

Thanks.
Reply With Quote

Sponsored Links

  #2  
Old 02-23-2019, 11:58 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 3,924
andrewwynn is on a distinguished road
Cordless drill. It will make nice clean bite marks that you can file off if needed. I would probably buy some appropriate threaded rod and make new studs


Sent from my iPhone using Tapatalk Pro
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #3  
Old 02-23-2019, 01:11 PM
Emory39's Avatar
Member
 
Join Date: Nov 2014
Location: Boise ID
Posts: 548
Emory39 is on a distinguished road
I think you could buy the studs and nuts for it. When that happened to me I just put them back like they came out an all is well so far. That was about 2 years ago.
__________________
E36 M3 95-sold
E30 318i 91-sold
E39 528i 00-rebuild at136K - sold
E36 M3 98-sold
E53 X5 4.4 05-the beast
E53 X5 3.0 5M/T 01-sold
R56 Mini Cooper S 07-sold I should have keept it
E83 X3 3.0-the wife's
E36 M3 97 - The new project - sold
https://www.youtube.com/channel/UCcI..._as=subscriber
Reply With Quote
  #4  
Old 02-23-2019, 01:38 PM
Member
 
Join Date: Nov 2014
Location: SF Bay Area
Posts: 790
oldskewel is on a distinguished road
I had that issue on about half my exhaust manifold studs. I reused everything.

I used a M7-1.0 die to refresh all the exposed threads on the studs.
I double nutted on the other end (opposite the stuck nut), then held the doubled nut while removing the stuck nut.
Once I figured what was working, I optimized things to use my little impact drivers (10.2V and 12V) to speed things along.
Red High Temp thread locker when reinstalling the studs.
Cleaned up the nuts with a tap.
Then when reinstalling things went on about 10x faster than it all came out. I used copper anti-seize when reinstalling.

Exhaust manifold to cylinder head (M7) 15 Nm (11 ft-lb). 11mm hex head M7-1.0 nuts on studs, copper plated steel nuts.
__________________
2001 X5 3.0i, 180k miles, AT, owned since 11/2014

Last edited by oldskewel; 02-23-2019 at 02:01 PM.
Reply With Quote
  #5  
Old 02-23-2019, 03:07 PM
Member
 
Join Date: Mar 2007
Location: Seattle, WA
Posts: 160
e39_touring is on a distinguished road
What oldskewel said - or just buy new studs and nuts as they are not very expensive. Double-nutting the studs is the easiest way I found to drive them back in without damaging anything. Use two standard (non-locking) M7 nuts. Make sure there is nothing in the hole and don't crank them in too tight, or else you risk cracking the head. The nuts are 11 lb ft, but the studs should not be torqued, just screwed in snug.

I didn't use anti-seize because the nuts are copper and the studs are iron, but it can't hurt.
__________________
2012 xDrive35d
2001 BMW X5 3.0i 5MT
and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80
Block Tester
Reply With Quote
  #6  
Old 02-23-2019, 04:15 PM
Member
 
Join Date: Nov 2014
Location: SF Bay Area
Posts: 790
oldskewel is on a distinguished road
... and I also used the double-nutting to remove the ~8 studs that did not get pulled out when removing the nuts. Cleaned them up, etc. as with all the others.

For me, those nuts look like they're Copper, but were definitely Copper plated Steel (as proven when dropped in my magnetic tray). Pretty cool. But as I found, they still stuck on many of the studs. The main reason I used the anti-seize was that knowing how difficult it had been removing them, I wanted to do everything I possibly could to make reinstallation easy.

Also, if you use threadlocker like I did when reinstalling the studs, make sure you clean all the PB Blaster you used off. Adhesives are only as good as the stuff they stick to.
__________________
2001 X5 3.0i, 180k miles, AT, owned since 11/2014
Reply With Quote
  #7  
Old 02-23-2019, 08:24 PM
Member
 
Join Date: Dec 2006
Location: Texas
Posts: 829
lo_jack is on a distinguished road
I just got my headers on and ended up replacing nearly all the studs, and all of the nuts. The studs are 7mm x 39mm. Thread pitch is 7mm x 1.00, if you need to chase the head or run a die over your old studs.


I didn't use anything on the studs or nuts. Like E39 said, the nuts are oblong opening locking type. FCP has the best cost on studs, if you can wait.
__________________
2001 E53 3.0 5pd
Reply With Quote
  #8  
Old 02-23-2019, 09:41 PM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 200
Oldmactech is on a distinguished road
Thanks. I see the studs on FCP Euro but no nuts (except in a kit of 24 studs and I only need 16. Guess I’ll have to call them Monday or buy a tap and die set.
Reply With Quote
  #9  
Old 02-23-2019, 09:43 PM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 200
Oldmactech is on a distinguished road
Don’t understand the double nutting? Meaning run the second nut snug to the first and use it to counter twist?

The one I as able to get off with channel locks was hard to get off all the way until the end.
Reply With Quote
  #10  
Old 02-24-2019, 02:21 AM
Member
 
Join Date: Dec 2006
Location: Texas
Posts: 829
lo_jack is on a distinguished road
Yes, you put one non-lock nut on the stud far enough down to get another one on right behind it. Then you hold the outer nut with a wrench and back the one closer to the head back off. It won't because you are keeping the one on the end of the stud from moving. It tightens them together and you should then be able to use the one closer to to the head to back the entire thing out of the head. I got half of mine out that way, then put most of the new ones in that way. As was already stated, get some plain Jane regular 7mm nuts to do this with. It makes undoing them over and over much easier.
__________________
2001 E53 3.0 5pd
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 06:52 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 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.