An important requirement often over-looked in relatively new vehicles is the change period of the factory fitted coolant. It appears many people are not aware that nearly all Australian manufactured vehicles and the majority of overseas vehicles require a Coolant or Anti-Freeze change at 2 years or 40,000 Kilometres.
Today's Coolants are a sophisticated blend of Corrosion Inhibiting chemicals, Anti Foam agents, demineralised water and Mono Ethylene Glycol. The two main functions of a modern coolant are (1) To provide excellent corrosion protection to all the metals found in your cooling system. (2) To remove huge amounts of waste heat from the engine.
As conventional Coolants or Anti Freezes protect the metal surfaces by coating them with a micro thin film of corrosion inhibitors this action over time consumes the active chemicals. Once the Coolants corrosion inhibitors have been depleted the coolant will give little or no corrosion protection to your engine.
A well maintained cooling system will perform at maximum efficiency thereby stopping corrosion and the replacement of expensive engine components.
The current Australian Standard AS 2108.1.97 has two types of compliance, Type A and Type B.
For later model cars a Type A is generally required and for earlier models a Type B is adequate.