Author Topic: Should this hole be here?  (Read 8045 times)

Offline brichbk

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Should this hole be here?
« on: April 08, 2018, 08:43:23 PM »
I changed my transmission oil today and I was looking at this hole and thought “should it be here or should it have something in it?  I don’t remember it from when I had my transmission apart a couple of weeks ago.  And the pictures in my Clymers is not real clear.


Full disclosure:  I overfilled my transmission about a week ago with gear oil and drained it today and added the proper amount of fluid. I have gear oil leaking out of the hole in the picture. Some days it is just a drop other days it was a pretty decent size puddle.  With the drain and refill I am anticipating the leak to disappear.



  • Central Valley California
  • 1993 BMW K75RT // 1982 Honda Nighthawk 650sc

Offline Martin

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Re: Should this hole be here?
« Reply #1 on: April 08, 2018, 10:13:32 PM »
The hole is there to indicate you have a leaking seal. Or as you have just found out an indication that you have overfilled the gearbox.  :nono
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline brichbk

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Re: Should this hole be here?
« Reply #2 on: April 09, 2018, 12:05:58 AM »
The hole is there to indicate you have a leaking seal. Or as you have just found out an indication that you have overfilled the gearbox.  :nono
Regards Martin.


I was really hoping that was what was happening.  Thanks. :bmwsmile
  • Central Valley California
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Offline Martin

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Re: Should this hole be here?
« Reply #3 on: April 09, 2018, 02:13:38 AM »
Live in hope, die in despair.  :musicboohoo:
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline johnny

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Re: Should this hole be here?
« Reply #4 on: April 09, 2018, 07:22:10 AM »
greetings...

to prevent oil from leaking out that hoe... i slide a tampon up in there... let it sit overnight so it expands enough so it wont fall out on the road... no more oil on the floor...

ride dangerously...

j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline ackgs

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Re: Should this hole be here?
« Reply #5 on: October 08, 2018, 03:08:33 PM »
If I understand correctly transmission oil leaking out the weep hole is a result of over filling or bad seals. If not a result of over filling except for replacing seals are they any other options, perhaps a stop leak additive or is that just a waste of time.
1991 K75S

Offline johnny

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Re: Should this hole be here?
« Reply #6 on: October 08, 2018, 03:22:29 PM »
greetings...

you could put some seal sweller in there... might swell the clutch oring or the rear seal enough the stop the leak...

j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline ackgs

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Re: Should this hole be here?
« Reply #7 on: October 08, 2018, 03:26:08 PM »
Thanks Johnny, any particular brand recommendation or just off the shelf. Any compatibility issues to watch out for? I may give that a try can always pull the trans later.
1991 K75S

Offline johnny

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Re: Should this hole be here?
« Reply #8 on: October 08, 2018, 03:36:12 PM »
greetings...

i have not used seal sweller in my trans... i just ride them until the clutch slipps on a red line downshift between 5th and 4th... then i do the whole shebange and im good for another 90 thou...

j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline ackgs

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Re: Should this hole be here?
« Reply #9 on: October 08, 2018, 03:47:23 PM »
Thanks again. Probably will try the sealer, will pick some up tomorrow for a hopefully quick temporary solution. Probably end up doing the whole shebange.
1991 K75S

Offline Laitch

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Re: Should this hole be here?
« Reply #10 on: October 08, 2018, 04:28:21 PM »
Probably will try the sealer, will pick some up tomorrow for a hopefully quick temporary solution. Probably end up doing the whole shebange.
How did you identify it as transmission fluid?
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Offline ackgs

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Re: Should this hole be here?
« Reply #11 on: October 08, 2018, 08:05:54 PM »
How did you identify it as transmission fluid?

I have had back issues this summer with an operation in August so the bike has been sitting. There is a puddle of fluid under the weep hole and following it back it is emanating from the weep hole on the base of the transmission. I had put the oil in the transmission so I know what it looks like and have some left over on the shelf that smells and looks the same as what is on the floor. Checked the level of the transmission oil and it does not show on the dipstick/wrench in the tool kit. Level was correct in the spring. Engine oil level is fine and what is on the floor is thicker than engine oil. It is not antifreeze. So no I did not have it analyzed but I am going to go with trans oil. Might not be but I am going to start there. I could refill the trans and see if it leaks out again but don't want another mess and want to get back on the K.
1991 K75S

Offline Laitch

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Re: Should this hole be here?
« Reply #12 on: October 08, 2018, 08:10:38 PM »
If it smell like sulfur, it's transmission oil. I believe you. Just so you're aware, engine oil can drip from that hole too.
Good luck with the leak treatment.
  • Along the Ridley in Vermont.
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Offline ackgs

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Re: Should this hole be here?
« Reply #13 on: October 08, 2018, 08:18:24 PM »
Yes - Thanks I had read that. I am not getting a strong sulfur smell but the fluid does smell and look the same as the leftover on the shelf. The color is more towards clear than gold like engine oil. I am probably looking at a large repair eventually but think I will try the seal rejuvenator first.
1991 K75S

Offline ackgs

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Re: Should this hole be here?
« Reply #14 on: April 06, 2019, 08:17:51 PM »
Well weather finally improved and I got around to adding the stop leak and got out on the K. My back had not recovered enough before cold weather set in last fall to try it then. Got a few warm days a few weeks back and added the sealer and topped up the transmission fluid. Then got out for a few miles and the leak has stopped. That's good news but have to see how long the fix lasts. Another up side is that the goofy turn signal problem has gone away. Had performed Johnny's roll the bike backward and popped the clutch repeatedly. The problem came back, now after some more miles I did the roll backward thing again on a nicely sloped piece of road and it has been fine for a few rides. Johnny is correct it is whack. Thanks for the help guys.
1991 K75S

Offline rdivy725

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Re: Should this hole be here?
« Reply #15 on: April 07, 2019, 03:30:46 AM »
Well weather finally improved and I got around to adding the stop leak and got out on the K. My back had not recovered enough before cold weather set in last fall to try it then. Got a few warm days a few weeks back and added the sealer and topped up the transmission fluid. Then got out for a few miles and the leak has stopped. That's good news but have to see how long the fix lasts. Another up side is that the goofy turn signal problem has gone away. Had performed Johnny's roll the bike backward and popped the clutch repeatedly. The problem came back, now after some more miles I did the roll backward thing again on a nicely sloped piece of road and it has been fine for a few rides. Johnny is correct it is whack. Thanks for the help guys.

What is the turn signal issue? I just fixed one on mine...
  • Greater Pittsburgh Area
  • 1994 K75, 2002 R1150R, 2013 Triumph Thunderbird
1994 K75
2002 R1150R
2013 Triumph Thunderbird
Past: 71 R75/5

Offline daveson

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Re: Should this hole be here?
« Reply #16 on: April 07, 2019, 04:21:11 AM »
Sounds like you should clean the starter motor.
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Offline ackgs

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Re: Should this hole be here?
« Reply #17 on: April 07, 2019, 07:45:52 AM »
rdivy  - They go nutty not a simple lamp or relay issue etc. - sometimes one will come on and stay on or both will come on but usually no blinking. Does different things at different RPM. According to wisdom provided here it is a result of crud in the starter and there are load shedding electronics in there that malfunction, BMWs go figure. A temp/easy fix also suggested here is to stop the motor, kill switch off, push or roll the bike backwards and release the clutch.  I found a road with a nice grade and used gravity to help. Did it several times, all set now with the leak stopped. Tried it several times last fall before I stopped the leak and the fix would only last a few miles. Bottom line get the bike back on the road without reinjuring my back. Need the back for work. There is a thread here somewhere describing the problem and above solution. What was the problem and solution with your turn indicators?

Daveson - yeah know that but with the back issue I am in get the bike back on the road - heal up the rest of the way and then do more permanent repairs if needed mode. I have not looked at a good diagram of the motor, clutch and transmission area. I am wondering if the starter crud issue is/was caused by the leak. Both began about the same time. Now the leak has stopped the turn signals are working again after the turn signal fix, coincidence? Time will tell. Right now I am back on the road and getting in some bike time so I am happy with that. Hope to get out for a few miles later today.
1991 K75S

Offline rdivy725

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Re: Should this hole be here?
« Reply #18 on: April 09, 2019, 08:21:08 PM »
rdivy  - They go nutty not a simple lamp or relay issue etc. - sometimes one will come on and stay on or both will come on but usually no blinking. Does different things at different RPM. According to wisdom provided here it is a result of crud in the starter and there are load shedding electronics in there that malfunction, BMWs go figure. A temp/easy fix also suggested here is to stop the motor, kill switch off, push or roll the bike backwards and release the clutch.  I found a road with a nice grade and used gravity to help. Did it several times, all set now with the leak stopped. Tried it several times last fall before I stopped the leak and the fix would only last a few miles. Bottom line get the bike back on the road without reinjuring my back. Need the back for work. There is a thread here somewhere describing the problem and above solution. What was the problem and solution with your turn indicators?

Daveson - yeah know that but with the back issue I am in get the bike back on the road - heal up the rest of the way and then do more permanent repairs if needed mode. I have not looked at a good diagram of the motor, clutch and transmission area. I am wondering if the starter crud issue is/was caused by the leak. Both began about the same time. Now the leak has stopped the turn signals are working again after the turn signal fix, coincidence? Time will tell. Right now I am back on the road and getting in some bike time so I am happy with that. Hope to get out for a few miles later today.


I lean on the experts here and would say that they are prob right about the starter (many posts on here about the whakyness it can cause) BUT, my turn signals started acting just like yours. Left stopped working interm, right you would turn them on and the hazards would come on, then they just went completely whack. I traced it down to the load shed relay. I don't know how often it occurs for you, but try switching the horn relay with the load shed relay and drive it for a while.
  • Greater Pittsburgh Area
  • 1994 K75, 2002 R1150R, 2013 Triumph Thunderbird
1994 K75
2002 R1150R
2013 Triumph Thunderbird
Past: 71 R75/5

Offline ackgs

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Re: Should this hole be here?
« Reply #19 on: April 09, 2019, 09:54:25 PM »
Good suggestion and when I read your post I remembered that I had tried the relay swap last spring when the problem first arose.  No joy for me  with that fix. Same thing with both relays. Dug a little deeper in the forum and found the starter fix. For now  no leak and the turn signals are functioning properly.  If they act up again I will try thae relay swap again. The problem may well be a result of both issues.
1991 K75S
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