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"KRS/GT" Technical Q&A K1200RS/GT Technical Questions/Answers

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  #1  
Old 09-01-2017, 12:08 AM
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Leaky Oil / Water Pump telltale fix and pics

Im fairly intolerant of oil leaks on my bikes, so when i found a few drops of oil in the belly pan of my K1200GT I started to investigate.
At first I couldnt find where it was coming from, eventually I found it was coming from the telltale outlet between the oil and water pumps.
When I did the "Box-o-rocks" fix on my bike I inspected this area but it looked ok so I left it alone. (I had the seals ready to go, just didnt do it.)
Now its time to go back in and change the oil and coolant seals. You cant change the oil seal without renewing the coolant seal as well.





The oil and/or coolant will emerge here if one or both of the seals have failed.



I wont go through it all. Obviously, fluids need to be drained, front cover taken off, and pump assembly removed.
Once you have the pump on the bench, undo the impeller bolt and push out the shaft, and you will be left with the 2 seals in the housing.



The coolant seal has some parts made of carbon, but they cant be saved, so just crack them out and pull the pieces of the water seal out.



What you are left with is the shell of the coolant seal, pull this out carefully.



What you will see under the coolant seal, is the oil seal.



To remove the oil seal, flip the assembly over and find a nail with a broad head.



Place the head of the nail on top of the oil seal and tap lightly with a hammer and it will pop out.



All the seal pieces removed


.
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Last edited by CJS350 : 10-08-2018 at 07:51 PM.
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Old 09-01-2017, 12:09 AM
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Re: Leaky Oil / Water Pump telltale fix and pics


Oil / Coolant pump from the front with both seals removed. Might need a bit of a cleanup in there.



This shows the weep hole in between the 2 seals. The oil seal sits below this hole (as oil pump is innermost) and the coolant seal above.(as impeller is outermost)



Straw from a WD40 can showing the weep hole path from inside to outside.



Might be an idea to clean this weep hole too, if it were to block up, things could get nasty.





.
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Old 09-01-2017, 12:10 AM
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Re: Leaky Oil / Water Pump telltale fix and pics


To change the seals all you need is some basic drifts



Place the oil seal in the hole and press it in evenly



There it is in there



Place the coolant seal.



Place the coolant seal in its place and press it in firmly, but only contact it around the edges.
The seal has some sealant on it which will seal around the edges.


.
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Old 09-01-2017, 12:11 AM
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Re: Leaky Oil / Water Pump telltale fix and pics


Once the seals are in place the shaft can go back in.
Insert the impeller shaft in from the oil pump side, be very gentle, DONT HIT IT, just push it in until you feel it push through the oil seal.



At this point get a bolt and some washers and thread the bolt into the impeller thread.
You will use this bolt to "pull' the shaft through the coolant seal



With a ratchet on the impeller side and an allen key on the oil pump side, gently tighten the bolt to pull the shaft through.



You may need to reconfigure the bolt and washers (add or reduce the numbers) a few times as the shaft comes through



Stop when the oil pump cog is just below the sides of the oil pump housing. (a couple of thou under)



Cog flush with the housing walls.



New impeller back on and torqued up


.
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Old 09-01-2017, 12:12 AM
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Re: Leaky Oil / Water Pump telltale fix and pics


Installation is the reverse of removal. Pump back on, cover on, fluids back in.



And it should be all dry from now on. No more drips.


Simple, right ?

Hope this may help someone who needs to go there.

Images for this post are stored in the gallery (so they wont disappear "Photobucket style")

http://www.i-bmw.com/gallery/showgallery.php?cat=1806 with much larger pics available.

Thanks for looking. Roland.



.
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Old 09-01-2017, 08:20 AM
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Re: Leaky Oil / Water Pump telltale fix and pics

Colour me curious Roland, why selling the Staintune?

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Old 09-01-2017, 08:29 AM
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Re: Leaky Oil / Water Pump telltale fix and pics

Paul, you saw the ads. I had several Staintune systems, for various bikes and have since sold them off. Kept the best ones for my bikes, both have perfect Staintune systems on them.
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Old 09-01-2017, 09:26 AM
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Re: Leaky Oil / Water Pump telltale fix and pics

I wished we had something like that back in the 80's.Early K pumps were all problematic and the shafts would also pit from corrosion.BMW solved that with an updated shaft but also changed the coolant specs at the time,early 90's,and went from a regular green coolant to the nitrite free coolant types.I think that has to do with the nitrites changing to Nitric acids(?) over time and corroding internal parts.

Only manual available then was the Haynes. Took me a while to figure out that they had printed the seal direction pic as a reverse image.
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Old 09-01-2017, 11:03 AM
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Re: Leaky Oil / Water Pump telltale fix and pics

Thanks Roland, no doubt helpful to us with aging bikes!

Last edited by CJS350 : 10-08-2018 at 07:56 PM.
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Old 09-03-2017, 08:33 PM
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Re: Leaky Oil / Water Pump telltale fix and pics

Quote:
Originally Posted by RolandS888
And it should be all dry from now on. No more drips.


Simple, right ?

Hope this may help someone who needs to go there.

Images for this post are stored in the gallery (so they wont disappear "Photobucket style")

[URL="http://www.i-bmw.com/gallery/showgallery.php?cat=1806"
http://www.i-bmw.com/gallery/showgallery.php?cat=1806[/url] with much larger pics available.

Thanks for looking. Roland.



.

WOW. So that's where my oil is leaking from. I've had this problem since the spring. Doesn't leak too bad but definitely getting fixed at the end of the season. Thanks for the nice write-up.

Last edited by CJS350 : 10-08-2018 at 07:56 PM.
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Old 09-04-2017, 08:41 AM
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Re: Leaky Oil / Water Pump telltale fix and pics

Nice write up Roland!

Last edited by CJS350 : 10-08-2018 at 07:57 PM.
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Old 10-08-2018, 03:05 PM
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Re: Leaky Oil / Water Pump telltale fix and pics

Worthy of a sticky?
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Old 10-08-2018, 04:06 PM
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Re: Leaky Oil / Water Pump telltale fix and pics

Quote:
Originally Posted by RolandS888
Worthy of a sticky?
Yup.
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Old 10-08-2018, 07:43 PM
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Leaky Oil / Water Pump telltale fix and pics

Quote:
Originally Posted by RolandS888
Worthy of a sticky?

Of course it is worthy of a BOLD sticky !!

If only the admin could change the tread title to something like this:
Re: Leaky Oil / Water Pump telltale fix and pics

It would help new comer searching thru the sticky list AND also would help the search engine when using the expression "water pump"
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Old 10-08-2018, 07:58 PM
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Re: Leaky Oil / Water Pump telltale fix and pics

Quote:
Originally Posted by sailor
Of course it is worthy of a BOLD sticky !!

If only the admin could change the tread title to something like this:
Re: Leaky Oil / Water Pump telltale fix and pics

It would help new comer searching thru the sticky list AND also would help the search engine when using the expression "water pump"

Good suggestion Jean, had to do it post by post, but it should carry forward from this point on.
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Old 10-09-2018, 04:03 PM
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Re: Leaky Oil / Water Pump telltale fix and pics

I have been asked to itemise the parts used for this repair.
Not many parts. I only used these....

11 41 1 741 870 Slip ring
11 41 1 460 329 Shaft seal
;
Thats really all you need, they are both gently drifted into place from the same side..

11 41 1 461 173 I replaced the rotor as well (didnt really need it)

They recommend changing the spacer bush behind the rotor, I didnt, its part number 11 51 1 464 902

My shaft was still good, but if you need a shaft its 11 41 1 461 793.

Thats all there was.

Roland
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Old 10-14-2018, 09:23 PM
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Re: Leaky Oil / Water telltale fix and pics

Initially huge thanks to Roland for undertaking this in the first place! Next to Euro MotoElectrics for having parts available and reasonably priced, less than $50 delivered. https://www.euromotoelectrics.com/pr...pumpkit870.htm

My '02 RS is at the local independent shop to have the dreaded $1.00 o-ring replaced. I lack the time and space to undertake the procedure on my own. In the process of having the bike looked at revealed that the seal that separates the chambers on the combined oil / water pump had failed. A new part from the stealer is $800 +, didn't want to go there.

So I took Roland's advice and took a shot at the repair. The toughest part was removing this piece,



I think a long nose vice grips would have been useful, but not having one I wound up bending the part away from the inner surface until it finally surrendered.



The inner seal was a mess,



and after it was out clean up was in order,



and after clean up, with a soft wire brush on my dremel,



and from there I followed Roland's directions, and its ready to go back in the bike, here's the old parts and the new parts,



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