F650GS Waterpump

[madmart]

Hi Gsers,
I have just noticed water dripping out of a little hole under the left hand side casing. Hazzarding a guess I reccon it is the waterpump thats leaking. What kind of job is this to sort?
Thank you.

Madmart.

 

[LOLGEOFF]

Have a look here on The Chain Gang Site They'll have all the information you'll need for a 650.

 

[madmart]

Thank you. Nowt's ever straight forward with these BM's is it. Ha!

 

[nick]

I thought water pump problems on 650's were supposed to be rare ?

Thats what everyone kept telling me !

But then mine didn't just leak, it spat out all the water when this pipe joint blew (on 3 occasions).

 

[LOLGEOFF]

I thought water pump problems on 650's were supposed to be rare ?

Thats what everyone kept telling me !

But then mine didn't just leak, it spat out all the water when this pipe joint blew (on 3 occasions).

Oiii ......Stop trying to tar the 650 with the 1200 brush.

Move On..... Nothing To See Here.

We Look After Our Own.

 

[muzvmc]

Had the same problem on mine at 20k. The water pump impeller shaft uses the seal as a bearing (rubbish or what). I know that you need to drop the engine forward to remove the sidecase due to the oil line behind the clutch.
I cut that oil line and got a section of braided hose made to run from the sump to just below the oil tank. Took a bit of searcing to find the right connectors as the original BMW pipe is an odd size. This has worked fine for 6k now and means i can remove tha clutch cover easily. Hope this helps.

 

[komatias]

No you dont need to drop the engine forward. U just take the exhaust manifold left footpeg holder and the left cover off. The manual says so and it is easier.
Cutting the oil return line is one of the best mods to do on the rotax engines as far as I am concerned, it saves loads of time when doing clutch or water pump repairs. There is loads of info on the chaingang site as cited above.

Now for the problem at hand... there is a weep hole that is covered by the lowest bolt holding the impeler cover. This should have a copper crush washer. I have heard of the bolts slackening with time and also of the washer corroding. this would be the first step in troubleshooting. If its not dripping from there then it might be the rubber seal that goes in the lip of the impeller cover.

If your bike has got more than 20k then i would suggest you get yourself a new water pump repair kit and over haul the entire system. especially if you see you oil level rising and loads of mayo in the oil filler cap.

Hope this all helps

 

[Smelly Biker]

Yup, second that, had the same problem, you dont need to move the engine.

If the weep hole is weeping change out the water pump shaft/impeller and both seals. The shaft will have a groove worn in it so just changing seals wont fix it (for long).

A dab of sealant on the rubber seal of the impeller cover is a good idea & while you've got it in bits you might as well check the clutch.

 

[richc]

Had the same problem on mine at 20k. The water pump impeller shaft uses the seal as a bearing (rubbish or what). I know that you need to drop the engine forward to remove the sidecase due to the oil line behind the clutch.
I cut that oil line and got a section of braided hose made to run from the sump to just below the oil tank. Took a bit of searcing to find the right connectors as the original BMW pipe is an odd size. This has worked fine for 6k now and means i can remove tha clutch cover easily. Hope this helps.

No, just tip the bike to the right (a block of wood under the side stand should do the trick) - then the oil won't run out when you remove the cover. As suggested, I'd check that lower bolt first tho and see if that's your problem. If not, replacing the pump isn't a big job. I'm pretty sure BMW recommends coating the seals with grease - don't do this as grease can block the weep hole. Coat the inner one with anti-freeze and the outer one with clean motor oil.

 

[komatias]

If you use the recommended grease, Retinol or something, in the right place, ie between the seals, you wold have a problem. The pressure of the oil an water squeeze the flanges on the impellor shaft and seal the circuits. No grease means that the seals are more likely to fail. Again, use only the recommended grease.