Found an article on carcraft.com "keeping cool"
a few excerpts,,,crossflow rads,,
"An added benefit is that the radiator cap can be positioned on the suction or low pressure side of the radiator-- the tank that receives the coolant after it has passed through the core. The low pressure/low velocity environment in this tank allows the air to separate from the coolant and bleed off first when the cap's blow-off valve is activated by excessive pressure in the system."
mmmmmmmmmmm.
radiator caps,,,,
"Cooling systems are pressurized to raise the boiling point of the coolant, since normal engine temps are significantly higher than the boiling point of water at atmospheric pressure. The pressure level is usually maintained by a blow-off valve incorporated into the radiator cap. When system pressure exceeds a predetermined level, the valve opens and bleeds off pressure until it reaches the desired level, at which point the valve closes. If the spring in the cap weakens or the rubber seal deteriorates, system pressure drops and the coolant can boil, which then aerates it and reduces its effectiveness drastically. This condition will also allow coolant to be purged into the overflow container, though it will not be drawn back in when the system cools, Don't ignore that hissing and gurgling you're hearing every time you shut off the engine."
mmmmmmmmmmm...
I've never completely over heated yet, you know with the steam and stuff, but burped green puddles quite often, it even did it when I parked at the rad shop,, the guy said " look a leak.."
