Importance of Coolant
The main function of coolant is to efficiently and rapidly remove heat from an operating engine, stop corrosion, and keep all hoses and seals durable and pliable during their service life. Growing demands to lift fuel efficiency and lower exhaust emissions have only served to place increased demands on the cooling system. Greater use of more corrosion prone lightweight alloys has become a real problem in poorly maintained cooling systems.
High output, small capacity engines generate more heat that must be dissipated over a small area and a coolant in top condition will transfer the heat better by reducing ‘Film Boiling’ which is characterized by large air bubbles in the liquid, leaving large areas of the cylinder head temporarily dry and unprotected. As the temperature increases, the bubbles collapse and the resultant shock waves impact and erode the surface of the cylinder head. More aerodynamic, low profile engine bays have also increased under bonnet temperatures. That is why it’s so important that your engine coolant is in top condition with the correct formulated glycol mix to provide maximum heat dissipation and protection against cavitation, crevice and stress corrosion.