Take compressed air and blow air up into the the weep hole. For some odd reason it made 3 different CRF's stop leaking. It's worth a shot.
SOURCE: 04 yfz 450 water pump leaking from weep hole
you get the impeller of from removing the complete side case ( not only the water pump cover) then you can remove the water by unlock the internal water pump shaft....replace OIL SEAL
93109-11073-00 and also OIL SEAL,SD-TYPE
93102-12321-00 just to have you're mind in piece..they are so unexpensive that you d'ont wanna take any chance for 4.00 usd.....
SOURCE: 2003 yamaha leaking through weep hole
yes your water pump is gone ,will need to replace,this happens when the bearings give out,cheers roady
SOURCE: my water pump is leaking coolant from the bottom.
will need a seal, and sometimes a new impellor shaft. dont ignore it and let the bike overheat
SOURCE: water is leaking from weep hole in water pump
I had to replace the shaft as well in mine so it would seal, it had worn a groove.
SOURCE: bike keeps over heating and leaking coolant from
THERE IS A PLASTIC GEAR IN RT SIDE COVER HOOKED UP TO WATER PUMP IT IS WORN OUT REPLACE IT
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Hi guys I just rebuilt a 2006 YZ450F and changed every bearing, every seal and O-ring in the entire Engine. I specifically made sure to change all the water pump parts with the exception of the impellar and shaft as they looked to be in good condition. The bike runs amazing but noticed coolant coming out of the weep hole indicating bearing or seals have gone bad. But everything is new and installed properly. Used the original repair manual to make sure the seals and bearings went in right. It’s only leaking once bike gets hot. I havent rode the bike just started and run it in garage to warm it up and change the oil a few times to make sure all contaminants get out. Is it normal to leak from weep hole when it gets too hot? Coolant came out the radiator hose (over heat top hose) but also from the weep hole.any help would be appreciated!
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