Coolants and Antifreeze
Since water is
easily obtained, cheap, and has the ability to transfer heat readily, it has served as a
basic coolant for many years. Some properties of water, such as its boiling point,
freezing point, and natural corrosive action on metals, limit its usefulness as a coolant.
To counteract this, use an antifreeze.
usually ethylene glycol, is mixed with water to produce the engine coolant. Antifreeze has
winter freeze up, which can cause serious damage to the engine and cooling system.
rust and corrosion by providing a protective film on the metal surfaces.
the water pump, which increases the service life of the pump and seals.
the engine; prevents overheating in hot weather.
cooling and winter protection, a 50/50 mixture of antifreeze and water is recommended. It
will provide protection from ice formation to about 34°F.
of antifreeze produce even lower freezing temperatures; for example, a 60/40 mixture will
protect the cooling system to about 62°F. However, this much protection is not
Ethylene glycol is a toxic material. Avoid prolonged skin contact or
accidental ingestion. Wear protective gloves and goggles while handling antifreeze and