2010 EC 300 Water pump shaft snapped & bearing collapsed

[Jakobi]

I'm surprised you could even get the water pump cover on with the checkpoint installed. Not a chance on my 2010.

[mp5]

Originally Posted by n_green

Hmm I've only just read this thread which has me very very nervous as approx 30hrs ago I simply replaced the std plastic impeller with a checkpoint alloy one. Never measured clearances or anything.
But it has been in there for at least 20-30hrs. Now I have a 2 day ride this weekend, should I check it out before I go or just leave it alone til I get back? I have a feeling ill be sad when I do have a look :-(

I thought the same after I read this news. I did rings a month ago and inspected wp very quickly...all looked good at a glance. I double checked last night and sure enuf....wear on inside of case and impeller. I order the gear from GF but took some time and buffed out the wear grooves in the case and slightly touched up the impeller tips a hair with flat file. I used the spray paint method that was suggested by Glenn. It worked fine for a temp fix. I wont be riding my bike because of work comittments for the next wk however....long enuf to receive parts from GF. Can you take your impeller and have it machined down on the backside? Or stack another gasket/spacer wthe existing?

[john r b]

I had done the very same,took the impeller to a machine shop. There's limited
material that can be taken from the back side of the impeller,This worked fine on one bike,(200) The other impeller was machined and still made contact
so I fabed a spacer from an old skid plate,that was less than 3/16''. Has worked fine since.Best of luck.

John

[Ignas]

So i had catastrophic water pump bearing/ shaft failure today and
I even checked water pump impeller clearance before assembling.
Is there anyone that can beat me at the damage costs?

[john r b]

Looks to be a least the right case side?? ouch for sure.

[rgranger]

And Main gear. took 8 months for parts.

[Ignas]

I have managed to fix the casing. Bought new bearings, found water pump shaft and gear in spares box. Everything was less than 20euro
Hope i will be riding next week without other disasters

[swazi_matt]

I thought I had no issues with this when I installed the CP impeller but obviously I was wrong
Although I don't think I should do anything considering I have at least 150 hours of hard rock riding since installing it. Maybe just clean it up with a dremmel stone or sandpaper?

[swazi_matt]

Gear on the back looks fine

Anyone tried stacking two oem gaskets to add space? (maybe the old one and a new one?)

[GGRider01]

My stock plastic impeller looks to have rubbed the cover for the last 15 years. I think it has given itself clearance long ago by doing this. I would personally keep running it and just polish the inside of the cover and maybe the top of that impeller.

I am still learning a lot about these bikes and working on them, so take my advice with a grain of salt. Having said that, I don't see anything to be concerned. After 150 hours, it has sorted itself out. Just polish and ride on.