[cycleguy55]

A 50/50 mix of ethylene glycol and water with a 15 lb. radiator cap boils at 265 deg. F. - I see no problem with 210 or 220 deg. F. I have a 180 deg. thermostat in my BBF and it runs around 190-200 on the highway, but will regularly creep up above 210 when in traffic - and I've never had any problems.