The Purpose of Coolant
The primary function of a coolant is to transfer heat away from the combustion in the engine. It is also imperative to protect the metals in the cooling system against corrosion.
The primary function of ethylene glycol in the coolant is to offer anti-freeze anti-boil protection. Water is an active heat transfer fluid by itself. However, it has a limited operating temperature range. When combined with Glycol, the formulation offers a lower freezing point & a higher boiling point than either fluid used on their own.
Types of Coolants
Coolants are classified as either Type A or Type B depending on the level of glycol they contain.
Type A Coolants
Contain above 20% glycol content
Offer anti-freeze anti-boil protection
Nearly all new car manufacturers will recommend a Type A product
Type B Coolants
Contain below 20% glycol content
Offer minimal or no anti-freeze anti-boil protection
Typically they are referred to as corrosion inhibitors
Organic Vs Conventional Coolants
Conventional style coolants are created using older technology but have a solid performance history. This traditional type of coolant will have a shorter lifespan than organic & is suited to earlier model vehicles.
Organic coolants are manufactured using a new process referred to as Organic Acid Technology (OAT). This process provides the ability to along lifespan due to low chemical depletion rate.
Note: Conventional & organic style coolants do not mix well together.
There are many types of corrosion that can occur in a cooling system, which is why a coolant with a good quality corrosion inhibitor package is required. Tectaloy coolants all contain an inhibitor package that provides maximum protection against corrosion.