Radiator has sprung a leak!!!

On my brother's '98 KX125 the right side radiator has sprung a leak. At first, it looked like the radiator cap went. We put a new one on, but still the thing leaked. It's a very slow leak. After about 10 laps on the track, the coolant is still above the fins. It won't leak until the bike is good and hot. It won't leak at all when the bike is cold. After looking closely, it looks like the coolant is coming from right under the opening where you put the cap on. If you look at the tiny gap between the little cup where the cap screws on, you can see the coolant ever so slowly seeping out. Does anyone know of any fixes? We called a local radiator shop and they said if it's aluminum, they won't touch it....Any thoughts???

Nick

Well...This is pretty embarassing, but I found the problem....

:mad: :think :mad:

We took the radiator off for another inspection. I am looking around the cap, and hmmmm, I see the vent hose filled with antifreeze. I think, gee, that's funny. I look down, and the thing is packed full of mud about half way up! DUHHHHHH! Since it was clogged, it was not able to breathe. Creating too much pressure. And of course a radiator releaves such pressure through the cap!

Needless to say, I cleaned it out, and it works fine. Went the race yesterday, didn't leak a drop.

Can you say DUUUUHHHHHHH??

What a dummy! At least it was a cheap fix!
:scream:
Thanks guys for the input...

Nick