BMW K bikes (Bricks)

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1Back to top Go down   Leaky alternator Empty Leaky alternator on Mon Jan 03, 2011 5:26 pm

otto59

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At the end of the riding season I noticed an oil smear coming from the alternator. No oil was present at the weep hole on the bottom of the bell housing so I am assuming there is an alternator seal that needs to be replaced. Is this seal accessible with the alternator removed or will I need to remove the transmission and bellhousing?

    

2Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Mon Jan 03, 2011 7:52 pm

K-BIKE

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Hi Otto,
Disconnect the battery and pull the alternator out it is only three bolts to remove it and take a look. Leaks from the engine into the space occupied by the alternator are relatively rare.
Regards,
K-BIKE

    

3Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Mon Jan 03, 2011 9:56 pm

otto59

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I'll do that as soon as weather permits. -30 outside now, heater in shed not quite enough at the moment. Thanks.

    

4Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Wed Jan 05, 2011 5:50 am

K-BIKE

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That is fingers like sticks of wood territory!
Regards,
K-BIKE

    

5Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Wed Jan 05, 2011 5:28 pm

club_c

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@otto59 wrote:I'll do that as soon as weather permits. -30 outside now, heater in shed not quite enough at the moment. Thanks.
So much for global warming. +3* here today...

    

6Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Wed Jan 05, 2011 7:57 pm

K-BIKE

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Never was a truer word spoken club_c
Regards,
K-Bike

    

7Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Wed Jan 05, 2011 8:15 pm

Crazy Frog

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I wouldn't call this a global warming, but a climate change. Look at Europe last month.... People felt the chill in the air rather than a heat wave.


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Leaky alternator Frog15Leaky alternator Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

8Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Wed Jan 05, 2011 8:29 pm

K-BIKE

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That's because we are in a global cooling phase at the moment.
Regards,
K-BIKE

    

9Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Thu Jan 06, 2011 8:01 am

Ned

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Smile or global averaging Smile

it got wet and warm here Smile


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I reserve the right to voice my opinions on any subject known to man
Ned

05/1986 (K55) K100RS Motorsport (Europe), Production Code: 0503, 110k km, VIN:0140519 (SOLD)
1976 Honda Goldwing GL1000 (naked)
1997 BMW K1200RS red, VIN: WB10544A1VZA22667
    

10Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Thu Jan 06, 2011 2:05 pm

otto59

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Has anyone else experienced oil leaking from here and/or what are other possibilities (for the leak, not global warming)? There must be engine oil in there to keep the gears for the starter, etc. well lubed.

    

11Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Thu Jan 06, 2011 9:01 pm

K-BIKE

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Hi Otto,
The starter and alternator don't share the same access hole. The starter gear and its infamous sprag clutch, that barometer of oil quality that owners have been using, are indeed immersed in oil but the alternator drives through a cush drive assembly often called "monkey nuts" from a slightly different location so the end of the alternator is not in an oil bath.
Regards,
K-BIKE

    

12Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Fri Jan 07, 2011 1:17 pm

otto59

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But is there any oil in there that could possibly leak out? From the photos in the Haynes manual the sprag clutch and "monkey nuts" appear to share the same chamber at the top of the bellhousing? If not, what else could cause an oil leak up there?

    

13Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Fri Jan 07, 2011 7:14 pm

K-BIKE

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Hi Otto,
Let us know what you find when you pull it out.
Regards,
K-BIKE

    

14Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Sun Jan 09, 2011 4:55 pm

ReneZ

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Are you sure its oil, not dirty water/fuel? You're directly below the two little pipes coming through the fuel tank, the breather liner and the drain from the cap recess.


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Greetings from Florida! Having a 'new' K  :cyclops:    Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Leaky alternator Rain
BMW K1200GT - 2003 (ZK01223)
    

15Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Mon Jan 10, 2011 9:30 am

otto59

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Smells and feels like oil.

    

16Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Mon Jan 10, 2011 3:28 pm

Crazy Frog

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There is a seal on the back of the driving dog. The only problem is that you have to remove the clutch and the bell housing to access it. Check seal #6 on the picture

Leaky alternator Altern10


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Leaky alternator Frog15Leaky alternator Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

17Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Tue Jan 11, 2011 5:12 am

K-BIKE

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I still say let's not get too concerned until the alternator is out and you can see what the situation really is inside, until you get it out and find there is or isn't a problem you may be worrying over some spilled oil which has worked its way down over the outside of the engine.
Regards,
K-BIKE

    

18Back to top Go down   Leaky alternator Empty Re: Leaky alternator on Mon Jun 25, 2012 7:16 pm

jeffeaby

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don't have to remove the clutch or bell housing. once the alternator is off, remove the alternator drive shaft end (dog shaft) with the single center bolt and just pull it off. the seal is on the outside of the bell housing and can be swapped out with no more removal of big parts. also there is a o-ring that goes in before putting the dog shaft back on. this o-ring never made it to any BMW parts lists, so gotta find a replacement on your own (14.5mm ID, 1.6mm thick).

    

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