ADVrider

Go Back   ADVrider > Bikes > GSpot > GS Boxers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-18-2013, 04:36 AM   #1
Three Dawg OP
Gnarly Adventurer
 
Three Dawg's Avatar
 
Joined: Apr 2009
Location: The Highlands of Scotland
Oddometer: 484
1100GS Gearbox oil drain plug

Just changing the fluids in my 97 1100GS and didn't notice a washer coming out with the gearbox drain plug. Is the one I have the later revised 'washerless' one, and if so, am I right in thinking that the torque setting for this type is higher (circa 30Nm rather than 23?) than the ones with a crush washer? The Haynes manual doesn't seem to mention a washerless type.



It's been suggested that the washer may still be attached to the gearbox, but if it is, I can't shift it:

Three Dawg is offline   Reply With Quote
Old 11-18-2013, 04:39 AM   #2
JimVonBaden
"Cool" Aid!
 
JimVonBaden's Avatar
 
Joined: Feb 2005
Location: Alexandria, VA
Oddometer: 48,563
Looks like the washerless type. I am not aware of a different torque value for it.

Jim
JimVonBaden is offline   Reply With Quote
Old 11-18-2013, 07:29 AM   #3
Three Dawg OP
Gnarly Adventurer
 
Three Dawg's Avatar
 
Joined: Apr 2009
Location: The Highlands of Scotland
Oddometer: 484
Cheers Jim.

Three Dawg screwed with this post 11-18-2013 at 07:46 AM
Three Dawg is offline   Reply With Quote
Old 11-18-2013, 08:13 AM   #4
Jim Moore
Beastly Adventurer
 
Jim Moore's Avatar
 
Joined: Dec 2001
Location: Jax, FL
Oddometer: 12,522
Can I tell you my theory on that? My theory on that is this. They're all supposed to be 32 nm. 23 nm is a misprint. They transposed the numbers in several places in various manuals. 23 nm won't crush the washer. I've had drain plugs leak after being tightened to 23. I use 32 nm for all of them.
__________________
Jim Moore
Jax, FL

Pay the lady, PirateJohn, you thieving piece of garbage.
http://advrider.com/forums/showthread.php?t=949341
Jim Moore is offline   Reply With Quote
Old 11-18-2013, 08:22 AM   #5
Three Dawg OP
Gnarly Adventurer
 
Three Dawg's Avatar
 
Joined: Apr 2009
Location: The Highlands of Scotland
Oddometer: 484
Just done up the drive housing fill and drain bolts to 23Nm with lightly oiled threads and they felt pretty tight to me- 32 seems quite a lot on a relatively short thread.
Three Dawg is offline   Reply With Quote
Old 11-18-2013, 05:10 PM   #6
AntonLargiader
Beastly Adventurer
 
AntonLargiader's Avatar
 
Joined: Aug 2003
Location: Charlottesville, VA
Oddometer: 4,127
JimB: that plug takes a crush washer. You can see the taper and the absence of a sealing lip.

JimM: Thanks for at least saying that it's just your theory. The washerless plugs really do have a higher torque. It's described in a bulletin (listed there as 30 Nm actually).
__________________
Anton Largiader largiader.com BMWRA.org
AntonLargiader is offline   Reply With Quote
Old 11-18-2013, 05:52 PM   #7
JimVonBaden
"Cool" Aid!
 
JimVonBaden's Avatar
 
Joined: Feb 2005
Location: Alexandria, VA
Oddometer: 48,563
Anton, do you have a photo of that plug with a crush washer on it?

Jim
JimVonBaden is offline   Reply With Quote
Old 11-18-2013, 06:22 PM   #8
AntonLargiader
Beastly Adventurer
 
AntonLargiader's Avatar
 
Joined: Aug 2003
Location: Charlottesville, VA
Oddometer: 4,127
This shows the two plugs types. One has a taper to center the crush washer, and the other doesn't but has extra grooves on the face to seal against the transmission (and gets the higher torque). There are several other plug configurations but the main difference is this:



The OP's drain plug has a step in it which may have mashed the crush washer outward and jammed it into the machined bore in the trans case. It's really hard to tell sometimes if there is a washer stuck in there.
__________________
Anton Largiader largiader.com BMWRA.org
AntonLargiader is offline   Reply With Quote
Old 11-18-2013, 07:34 PM   #9
JimVonBaden
"Cool" Aid!
 
JimVonBaden's Avatar
 
Joined: Feb 2005
Location: Alexandria, VA
Oddometer: 48,563
Quote:
Originally Posted by AntonLargiader View Post
This shows the two plugs types. One has a taper to center the crush washer, and the other doesn't but has extra grooves on the face to seal against the transmission (and gets the higher torque). There are several other plug configurations but the main difference is this:



The OP's drain plug has a step in it which may have mashed the crush washer outward and jammed it into the machined bore in the trans case. It's really hard to tell sometimes if there is a washer stuck in there.

Thanks!

I am pretty sure there is no crush washer stuck in here, the picture is very clear:

Quote:
But, it is easy enough to figure it out.

Jim
JimVonBaden is offline   Reply With Quote
Old 11-19-2013, 01:29 AM   #10
Three Dawg OP
Gnarly Adventurer
 
Three Dawg's Avatar
 
Joined: Apr 2009
Location: The Highlands of Scotland
Oddometer: 484
Sheesh, how many types of drain plug does one bike need?

Unless there is a washer that obviously fits that taper arriving with my other bits and pieces today I think I'll just bung it back in at 23 Nm and keep an eye on it.
Three Dawg is offline   Reply With Quote
Old 11-19-2013, 05:43 AM   #11
Dan Căta
Beastly Adventurer
 
Dan Căta's Avatar
 
Joined: Jun 2008
Location: Cluj, Romania
Oddometer: 1,552
I suggest you change the plug to the one on the L/H side, it is a better design than the one that uses a allen key. Had to replace the gearbox oil on a friend's bike recently and the PO screwed the bolt so hard in, that I broke the 6 mm bit in the plug :|

This would not have happened if he would have used the torque wrench and the outer hex head plug...

Dan.
Dan Căta is offline   Reply With Quote
Old 11-19-2013, 05:52 AM   #12
AntonLargiader
Beastly Adventurer
 
AntonLargiader's Avatar
 
Joined: Aug 2003
Location: Charlottesville, VA
Oddometer: 4,127
He already has that one; you can see it in the first post. But you're right, the 6mm Allen version is problematic that way. I've dealt with a few tough one, too.
__________________
Anton Largiader largiader.com BMWRA.org
AntonLargiader is offline   Reply With Quote
Old 11-19-2013, 01:09 PM   #13
Basic_Gerd
Gerd
 
Basic_Gerd's Avatar
 
Joined: Mar 2007
Location: Germany ~Nuermberg
Oddometer: 243


This one was mounted without washer too. I would never omit the washer, because it protects against that seizing. Way too dangerous for the housing.

Without that grinding compound trick that screw would not have come out.
__________________
The difference between theory and practice practically is larger than the difference between theory and practice theoretically.

BMW Airhead -> www.zeebulon.de/bmw
BMW R1100GS -> www.zeebulon.de/R1100GS
XT 500 -> www.zeebulon.de/xt
Basic_Gerd is offline   Reply With Quote
Old 11-19-2013, 01:13 PM   #14
Three Dawg OP
Gnarly Adventurer
 
Three Dawg's Avatar
 
Joined: Apr 2009
Location: The Highlands of Scotland
Oddometer: 484
Put washer on plug, put plug in hole, tightened to 23Nm. Should be OK. Thanks for all replies.
Three Dawg is offline   Reply With Quote
Old 11-19-2013, 03:29 PM   #15
AntonLargiader
Beastly Adventurer
 
AntonLargiader's Avatar
 
Joined: Aug 2003
Location: Charlottesville, VA
Oddometer: 4,127
Quote:
Originally Posted by Basic_Gerd View Post
This one was mounted without washer too. I would never omit the washer, because it protects against that seizing. Way too dangerous for the housing.
If there's no centering taper, you shouldn't use the washer because it could get far enough off-center that it leaks. Better to change to a washer-type plug.
__________________
Anton Largiader largiader.com BMWRA.org
AntonLargiader is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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 On

Forum Jump


Times are GMT -7.   It's 03:02 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014