help with overflow tank on new vn

[bad_vn]

hey guys gotta 89 vn today real nice, but took it for a half hour drive and got home and the overflow tank connnected to the raditor was boiling like a kettle~! waiting for it to cool right now, but does any one know what the problem is thanks

 

[sweefu]

Lots of problems i'd say..
there will be someone on here that can give you better advice but i'd say flush the whole cooling sytem and block, replace thermostat and re fill with new coolant.
There is a "How to flush v6 cooling system" in the how to section.
Cheers