2008 Yamaha Yz450 Waterpump problem

[desertracer49]

On my bike once I start it up the coolant leaks out of a hole on the bottom of the waterpump cover. It looks like it would be behind the impeller. Could it be the oils seal behind the impeller? Please respond.

[ProjectDIRT]

if its leaking from the whole the water side seal is bad the whole is an indicator.

[micahmorgan]

Sounds like the ol' water pump seals. I recommend you do a search in the yamaha forum for weep hole and/or coolant. You'll find lots of help. You need to replace the seals and likely the shaft too.