I was driving down the on ramp to get on the freeway and my upper hose blew off the rad.
I don't know why. I was not punching it just a steady accel.
not the first time this happen.

 

Are you having any issues with coolant being pushed out of the overflow? Maybe your clamp has lost pressure?

 

No I haven't seen any exit the overflow.. I have in the past when I shut the car off it would boil out the reservoir but not this time the hose blew off while driving having me try to get off the freeway in a hurry.

 

I would verify that the clamp has adequate pressure to hold the hose in place. The cooling system is pressurized, so this is important. To ensure there isn't any build up, I would also recommend a full coolant flush.