03 YZ450F losing coolant thru the little hole behind the water pump

Does this mean a seal is bad? Does the side cover (including clutch, etc..) have to come off to fix? I had popped a head gasket and after fixing that I noticed the leak on start-up. I might have lost coolant and overheated it. Head checked out fine so I'm hoping for the best.

Could be just the seal....or, could be the impeller as well. Run your finger nail down the shaft and if it catches (you will feel the ridge) then you need to replace that too. My 06 did the same and it is pretty straight forward to fix.

Thanks. Was just the seal.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now