based coolant is mostly 50% glycol and 50% water. Why isn’t the failure temperature the boiling point of the mixture, rather than the boiling point of water?
Some locations within the cylinder head generate so much heat that some of the nearby coolant boils. When local coolant boils, the resulting vapor is nearly 100% water vapor. If the coolant that is surrounding the water vapor is above the boiling point of water, the water vapor cannot condense. Under this condition, the water vapor makes an insulating barrier between hot metal and liquid coolant, causing the temperature of the metal to spike to high levels.
Related Questions
- based coolant is mostly 50% glycol and 50% water. Why isn’t the failure temperature the boiling point of the mixture, rather than the boiling point of water?
- Why doesn the temperature of water continue to rise after it reaches boiling point?
- How high in temperature does water have to reach in order to reach boiling point?
