Coolant leaking

[vavision]

I noticed that my right boot was shinier than normal and had to find out why.

I noticed that I'm getting a really slow leak from the bolt on teh bottom front of the water pump housing. Anyone have this happen before?

[louthepou]

Shiny boots are cool!  :D

My guess is either improper torque on a few bolts, or the rubber seal is getting old. The seal should still be available from Yamaha. There also is one tiny o-ring that could be changed at the same time.

Louis

[h2olawyer]

It may also be the coolant drain plug leaking a little.  You may need to replace the crush washer on the bolt.  Also, make sure it isn't coming from the small weep hole lower on the engine case.

Those shiny boots help decrease the wind resistance!  ;D

H2O

[Lucky]

Also check the weep hole on the water pump.  the weep hole is located below the pump. it's a tiny hole that leads to the gear side of the water pump shaft seal.  if the seal leaks coolant will leak (or 'weep') out. it's there to let you know the seal has failed.

often, because the engine is hot, the coolant will have evaporated from the case around the hole by the time you go to check it, leaving only a trace of coolant & in your case, a wet boot.  check it while the bike is running.

--Lucky