2010 yz450f water pump leaking


1 reply to this topic
  • cablemonkey334

Posted July 03, 2012 - 06:33 AM

#1

this just started not to long ago . so i replaced the inner and out water pump seals . went for a ride , still had coolant coming from the weep hole . so next i replaced the shaft and both seals again. went for a ride and the same thing happen again coolant out of the weep hole. so again i tore the thing down , this time i replaced the bearing ,shaft, both seals and gasket. i have a boysen water pump cover on the bike also. well you guessed it after the first ride its still leaking . what now? iv e tried a new radiator cap also with no luck. :devil:

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  • grayracer513

Posted July 03, 2012 - 06:46 AM

#2

First, be sure you're putting the seals in facing the right way:

Posted Image
Then, if it still leaks, consider the possibility of the balancer shaft bearing on the right side having failed:

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