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1Back to top Go down    92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 2:32 am

MikeisonTV

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So my K75 cafe started leaking oil and I want to fix it right, before I sell it. (Bought for building and selling)

I woke up to a big pool of oil underneath it (maybe a quart) after daily use of 3 months.

After I clean up the mess, I put a oil catcher under it. It's still a slow drip.

It's coming from here:


I just changed the oil, filter and oil ring 1 month ago. (500 miles)

Is there a bolt up in there? I can't get an Allen wrench to catch anything.

Thanks!



    

2Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 2:35 am

RicK G

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That is the breather for the chamber between the oil and water pump and if oil is leaking then you need to fix it.
There are quite a few threads on here about fixing it so have a look around and you will be supprised at just how easy it is to do.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

3Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 2:21 pm

MikeisonTV

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Thank u for the fast reply Rick. I'm having trouble finding a thread detailing the how to of this project. Also unsure if the parts I need to replace.

K75s real oem

Not sure which parts I need..? Thanks for always helping us newbies with our problems!!


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4Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 2:39 pm

charlie99

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basically the oil pump internals

pinched from motobins site


K OIL/WATER PUMP KIT (CONSISTS OF 1x41150,41155, 41160, 41165 & 41175)
ALL K100 & K75 PRE 01/1994 REQUIRE 1 * 41177 IMPELLER





http://www.k100-forum.com/t1070-replacing-the-water-oil-pump-seals


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

5Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 3:25 pm

MikeisonTV

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Thanks Charlie I'm on it! You guys are such a blessing to have in my corner as I learn my way around K bikes! I'll order all the parts and the41177 IMPELLER too.


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6Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 4:16 pm

charlie99

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whilst your there look for the dreibond 1208 sealant as well ....its not cheep ...but far cheeper from the bins ...under half price to bmw
its great stuff

only just a smear works well


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

7Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 6:54 pm

MikeisonTV

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http://www.motobrick.com/index.php?topic=1925.0



http://www.ibmwr.org/ktech/water-oil-pump-rebuild.shtml

http://www.ibmwr.org/ktech/water-oil-pump-rebuild2.shtml


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8Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Oct 11, 2013 8:47 pm

robmack

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@charlie99 wrote:whilst your there look for the dreibond 1208 sealant as well ....its not cheep ...but far cheeper from the bins ...under half price to bmw
its great stuff

only just a smear works well
There are alternatives, more readily available in the North American market place.

http://www.motobrick.com/index.php?topic=4933.msg30891#msg30891


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1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer
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9Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Thu Dec 05, 2013 10:08 pm

MikeisonTV

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So I finally rebuilt the oil pump...with the suggested parts. Unfortunately, radiator fluid leaked from the seep hole. When the initial leak happened I put a bolt in there to stop the continually leaking.

Just pushed it up in there with fingers. Did I damage the drip path? What can I do? Definitely got water mixing with the oil as I got some heavy white smoke from the pipes during my test run


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10Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Thu Dec 05, 2013 10:42 pm

RicK G

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I would say that the ceramic seal for the water pump has been broken on installation. That will account for the drip of coolant but the white smoke from the exhaust is usually due to water/coolant in a combustion chamber or if the smoke has a bluish tinge then oil in a combustion chamber. Hard to imagine how that would happen when fixing a pump.
The bolt wont have done any harm providing you didn't hammer it in (LOL)


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

11Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Dec 06, 2013 12:09 am

MikeisonTV

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I'll pull it all off and have a look or take it to a shop...thanks Rick


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12Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Dec 06, 2013 3:46 am

charlie99

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been a few posts on the rebuild in here

its isn't hard ...but care must be taken

good luck ...quite a few of us have been in there ...erm more than once ! grin Embarassed


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

13Back to top Go down    did you rest the bike on the side stand? on Mon Dec 16, 2013 11:47 am

simosvog

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@MikeisonTV wrote:So I finally rebuilt the oil pump...with the suggested parts. Unfortunately, radiator fluid leaked from the seep hole. When the initial leak happened I put a bolt in there to stop the continually leaking.

Just pushed it up in there with fingers. Did I damage the drip path? What can I do? Definitely got water mixing
with the oil as I got some heavy white smoke from the pipes during my test run

It is common than oil will go thru the oil ring gaps when you rest the bike on the side stand!! it should clear after a couple of miles.

http://www.motorinn.gr
    

14Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Tue Jan 07, 2014 3:44 pm

orforester

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So I am in the process of "freshin up" my 85 RS/RT(now). Replaced all the fuel lines, all the water lines, fresh seals in tranny, and rear engine. I know the water/oil pump tends to leak after almost 30 years, and I did the job on my 89 RS already last year, no big deal.

So off I go to redo the 85 pump. All the seals in, everything looking perfect, new seals, new style impeller, new bolt......wait no bolt like my 89? Shaft looks a little pitted, but cleaner up nice, this one has a nut on it.....Read the manual, torque to 15.5 #, so set the wrench, slowly work it down and then.....ARRRG
" />" />
Oh Crap say I, and then more. No problem, get a new (used one) off eBay. So I find a complete pump on Ebay,then I take apart the water/oil pump to reveal the below.
" />
Well plan C...take the first one to a machinist, drill out the stud and tap treads into the shaft. No chance, hardened steel.


Ok plan D...........buy a new one, and of course now new seals, since I had to take the old shaft out. But I used a generous amount of assembly lube and the old (broken shaft came out pretty easy, with a press. Think I will set it aside as a spare and use the Ebay case with brand new seals and new shaft. Oh well if not for Murphy........


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15Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Wed Jan 08, 2014 10:05 am

Avenger GT

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You have learned the hard way as I did a few years ago. Mine was not even at the torquing stage, I was just nipping the nut up with a small spanner. My solution at the time was a complete new pump, as a new seal kit and replacement shaft etc. was working out at more than half the price of a complete pump. Anybody thinking of fitting seals to one of these old pumps without replacing the shaft with the later type is only fooling themselves, as the shaft will break at the threaded part, if not straight away, then in the future.

    

16Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Wed Jan 08, 2014 12:30 pm

simosvog

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@charlie99 wrote:basically the oil pump internals

pinched from motobins site


K OIL/WATER PUMP KIT (CONSISTS OF 1x41150,41155, 41160, 41165 & 41175)
ALL K100 & K75 PRE 01/1994 REQUIRE 1 * 41177 IMPELLER





http://www.k100-forum.com/t1070-replacing-the-water-oil-pump-seals
So you should add this part to get a proper rebuild?
http://www.motobins.co.uk/bmw-parts.php?model=K%20Series#
That' another 120.00 euros:pale:

http://www.motorinn.gr
    

17Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Wed Jan 08, 2014 1:53 pm

orforester

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Only if you have the old style with the threaded end, they appear to be rather brittle and always break. I re-used my old one on the 89 and it worked fine, little steel wool to smooth it out, and this one was alright to re-install, till it broke, so my answer would be wait and see what your shaft looks like. Unless it is the threaded kind, then order a new one, ouch!


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89 K 100 RS se
85 K 100 RT
    

18Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Wed Jan 08, 2014 3:41 pm

sidecar paul

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I did the same as Avenger GT; it was more practical to buy a complete new pump assembly than pay half as much for the parts. That way you get a brand new oil pump as well.

If you're planing to keep the bike long term, then that's the best option. IMO.

Paul.


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'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015)
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19Back to top Go down    oil pump on Thu Jan 09, 2014 6:08 am

simosvog

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I just bought a used engine and I was thinking of an oil/water pump service to be on the safe side but considering the whole motor cost me with transportation 300 euros it might not be worth to do anything before I put it on the bike, (oil pump service, cam chain, piston rings ,gasket, valve sims might cost as much as 500eurosaffraid) I think I just add oil , a new oil filter and and cross my fingers.....then again I think of Murphy....

http://www.motorinn.gr
    

20Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Thu Jan 09, 2014 10:06 am

nino


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@simosvog wrote:I just bought a used engine and I was thinking of an oil/water pump service to be on the safe side but considering the whole motor cost me with transportation 300 euros it might not be worth to do anything before I put it on the bike, (oil pump service, cam chain, piston rings ,gasket, valve sims might cost as much as 500eurosaffraid) I think I just add oil , a new oil filter and and cross my fingers.....then again I think of Murphy....

You can repair the pump laterwith engine inframe, but leakage from clutch area could be solved only with engine dissasembled from gearbox. My mistake was to mount the engine without checking it, so my recomendation is:

1. change the seal on transmission shaft(gearbox side)

2. check the friction plate and change O ring behind the clutch assembley

Easy and not expencive

    

21Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Jan 10, 2014 6:34 am

simosvog

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Good advise Nino!that's what makes this forum so great!

http://www.motorinn.gr
    

22Back to top Go down    Re: 92 K75 cafe oil leak (pics) on Fri Jan 10, 2014 9:22 am

RicK G

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Yes they are not expensive items but a lot of work to replace them when it could have been easy.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

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