hello guys and gals. i have a question. hope this is an easy fix.. i just did a complete rebuild on my shee this winter. replaced crank,cyl. pistons,clutch,put new billet impeller in it. now when i get warmed up some, when i shut it off or if it sits and idles it will throw coolant out of the overflow hose down onto the pipes. it didnt do this at all before the build.. wondering what it could be and what i need to do.. any and all help will be greatly appreciated.