FE/FC FC450 Radiator stays pressurized

My 2016 FC450 keeps pressure in the radiator for days!! I pop the cap and the air just blasts out. I have Husky silicon hoses and a Boyesen pump cover on it along with a CV4 radiator cap. I add water to the radiator but the level seems to end up below the fins after a long ride and I fill it up again. Any thoughts on this problem?

Exhaust gas getting into rads pressurising them & blowing coolant out. Head gasket shot

+1^

Start the bike up without the radiator cap. You may see lots of bubbles (very fizzy) coming out of the coolant- which would indicate some kind of problem (And the easy fix would be head torque; the hard fix would be a cracked head; the in-between problem would be a blown head gasket).

The fizzyness might not appear until the bike is warmed up.

you can sometimes smell exhaust in the coolant... or coolant in the exhaust. And there is chemical testers that indicate exhaust gasses are present in the cooling system- but really, you'll be able to tell.

good luck.

bubbles in the coolant stream with the cap off are not an indication of a blown h/g. bubbles seen with the cap off come from a variety of things.

a blown h/g or cracked casting = pushing fluids from the rad/past the cap/ "boiling action" in recovery jar. esp. ona high compression engine. and you will most likely see some steam out the pipe that lingers when cold.

losing "water", or even coolant/water mix between rides is 100% normal. water evaporates and steams off. (that's why fast guys use FX from ZipTy and purge ALL the water from their system because.....). that fluid- coolant, is part of your pre-ride check list. good on ya for checking.

if you are worried about the pressure? the cap is your fuse. that will open off the spring before anything else goes boom. if you want to know how much pressure is in there? there's devices you can buy or make.

if in the AM after a ride, you pull your plug and it's not rusty (since there is water in the system), dont look weird, and can see in the chamber with a dental mirror and there's not a lot of condensate in there yer fine.

Any news?

Not yet, having the motor checked now.

how about now?