What is the boiling point for radiator fluid?

The boiling point of radiator fluid varies depending on its composition.

- Ethylene glycol-based coolants, which are commonly used in vehicles, typically have a boiling point of around 230 F (109 C) at atmospheric pressure. However, when mixed with water in a 50/50 ratio, the boiling point is elevated to around 265 F (129 C).

- Propylene glycol-based coolants, which are less toxic than ethylene glycol-based coolants, have a slightly higher boiling point, typically around 252 F (122 C) for a 50/50 mixture with water.

It's important to use a coolant that is specifically formulated for your vehicle as specified in the owner's manual to ensure proper engine cooling and protection. Mixing different types of coolant or diluting coolant with too much water may affect its boiling point and compromise its effectiveness.