BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   Possibly got water in my gearbox Empty Possibly got water in my gearbox Thu Nov 18, 2021 1:29 am

clappy

clappy
active member
active member
So my ‘85 RS is fully disassembled and I wanted to save some time cleaning the gearbox. I used a pressure washer and only now understand why that’s such a bad idea, especially for the gearbox.
There’s a pretty high chance that I got water in there. I still haven’t drained the fluid in there (old fluid sitting since at least 2013). 
What’s the best way to proceed?
I was thinking of draining it tomorrow and checking for water, but what do I do if I find water??

    

2Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Thu Nov 18, 2021 2:55 am

RicK G

RicK G
admin
admin
The water will go to the bottom because oil floats so hold it in the normal position and drain the contents then fill with fresh oil.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

3Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Thu Nov 18, 2021 10:00 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
After you drain the water and refill with fresh gear lube, it would be a good idea to take the bike for a good run and check the oil.  If it looks milky, you need to do another drain and refill.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Thu Nov 18, 2021 10:20 am

Born Again Eccentric

Born Again Eccentric
Life time member
Life time member
@clappy wrote:So my ‘85 RS is fully disassembled and I wanted to save some time cleaning the gearbox. I used a pressure washer and only now understand why that’s such a bad idea, especially for the gearbox.
There’s a pretty high chance that I got water in there. I still haven’t drained the fluid in there (old fluid sitting since at least 2013). 
What’s the best way to proceed?
I was thinking of draining it tomorrow and checking for water, but what do I do if I find water??
I guess it all depends how close you got with the pressure washer…and at what level of disassembly you had the gearbox at the time. If you have gone up close and personal in the vicinity of any of the seals, you probably will have got some water inside. I would follow Rick G & Point-Seven-5’s advice - drain down the gearbox and visually check the condition of the oil. If you’ve got a suitable clear container, decant the oil into that and let it stand for a few days to see if water separates out. If your pressure washing antics were done with the gear box off the bike, then it is likely that the oil will not have emulsified (i.e. hasn’t had the mechanical churning and gear meshing that causes the oil and water to mix together into a cloudy emulsion) and any water may have simply sunk to the bottom as Rick says. If the oil has been there since 2013, however, there is a good chance it might be cloudy/milky anyway, without your recent efforts. If you do find the oil is cloudy/milky/emulsified…I would fill and drain the gear box with fresh oil to help flush out any water/contaminants and then re-fill with fresh oil.

On an assembled bike, I keep at least 2’ away with the pressure washer and avoid fragile areas like the radiator (I have attributed at least 2 (aging) radiator leaks to my over zealous use of a pressure washer).


__________________________________________________
Possibly got water in my gearbox Uk-log10 Possibly got water in my gearbox Sco-lo15
                              Paul  Possibly got water in my gearbox 905546712

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donor" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

5Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Thu Nov 18, 2021 10:24 am

Laitch

Laitch
Life time member
Life time member
@clappy wrote:I used a pressure washer and only now understand why that’s such a bad idea, especially for the gearbox.
Actually, pressure washing is especially bad for the multitude of electronics in this moto because it can interrupt circuits and create an environment for oxidation. Your gearbox isn't a problem. Like BAE indicates, any infiltration into it by washing or condensation can simply be drained off and replaced by fluid. You are aren't going anywhere, anyhow right now anyway. Smile


__________________________________________________
1995 K75 81,000 miles
Possibly got water in my gearbox Usa-lo10
    

6Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Thu Nov 18, 2021 10:31 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Get a good cleaner that will do a good job of cleaning with light scrubbing.  Never use water pressure to remove grease from engine or drive train components. 

If necessary, disassemble the bike around the area you want to clean so you can get at it with a brush or a sponge.  Work the cleaner a bit and rinse with a gentle spray. 

I have found that S100 is an excellent cleaner that will remove dirt right down to the finish with light scrubbing.  It's one of the favorite cleaners among Harley riders, and we all know they are the most anal compulsive motorcycle detailers and polishers.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

7Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Fri Nov 19, 2021 11:44 am

moriarti

moriarti
Life time member
Life time member
I would drain the box and use PARAFIN to flush out any water or crud. Personally i use a MOLYSLIP oil mix gives smoother gear changes


__________________________________________________
1984 k100 rs red/black VIN  0004449
    

8Back to top Go down   Possibly got water in my gearbox Empty Re: Possibly got water in my gearbox Wed Nov 24, 2021 11:32 pm

clappy

clappy
active member
active member
Thanks all!

    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum