2008 Yamaha Yz450 Waterpump problem

2 replies to this topic
  • desertracer49

Posted November 14, 2009 - 06:23 AM


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.

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  • ProjectDIRT

Posted November 14, 2009 - 08:28 AM


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

  • micahmorgan

Posted November 14, 2009 - 07:01 PM


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.

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