Posts
205
Joined
3/26/2019
Location
Beverly Hills, CA, USA
Today was pretty hot and when I was loading my bike up I noticed a small amount of coolant around a bolt by the bottom of the engine by lower portion of the cooling system. It appears there's a small hole just above that bolt. Is this some type of overflow or something? The bike is a 2021 yz450. I checked the radiator tube and it did not seem to be fluid from that.
Just trying to see how worried I should be. Thanks.
So after some research the hole im talking about is called a "weep hole". I was reading that it is not normal and could be an issue with the water pump. One piece I read said to monitor and possibly it will resolve. Otherwise the seals and pump may need to be replaced.
Yeah, the weep hole is where radiator fluid goes when it leaks past the water pump seal. If your bike has some hours on it, its probably time for new water pump seal, but you could probably ride it again and just keep an eye on the fluid level in your radiator if it is a very slow leak. I personally wouldn't chance it, but you can. Its not hard to replace. Also check the water pump shaft for any grooving where the seal rides on it while you have it apart.
Shouldn’t be anything dripping from the hole.
Replace the 2 seals and the bearing and also replace the shaft if it has a worn groove in it. FYI If the bearing is worn it allows the shaft to pull to one side letting it leak.
NOTE the direction of the seals before pulling them out so they go back in in the correct direction.
Post a reply to: Coolant from bottom of engine