Cooling System: Description and Operation

Coolant Composition
Passenger car and commercial vehicle engine (normal case):
50% by volume water and
50% by volume anticorrosion/antifreeze agent.

Purposes Of Anticorrosion/Antifreeze Agent
Corrosion and cavitation protection for all components in the cooling system

Antifreeze Protection
Increasing boiling point so that the coolant does not evaporate so rapidly. Ejection of coolant is avoided at high coolant temperatures.
50% by volume of anticorrosion/antifreeze concentration offers antifreeze protection down to approx. -37°C.
A higher concentration is only practical at even lower ambient temperature.
55% by volume of anticorrosion/antifreeze concentration offers antifreeze protection down to approx. -45°C.
A concentration of anticorrosion/antifreeze agent higher than 55% by volume should not be used as the maximum antifreeze protection is thus reached. An even higher concentration again reduces the antifreeze protection and impair, heat dissipation.

Water
Use water which is clean and not too hard. Drinking water frequently, but not always, satisfies the requirements. The contents of dissolved substances in the water can be of importance for the occurrence of corrosion. In cases of doubt, analyze the water.

Operation Of Monitoring Of Coolant
Inspect coolant for resistance to low temperatures before the start of the cold season of the year.
In countries with high ambient temperatures, inspect the anticorrosion/antifreeze concentration once a year.
The corrosion protection in the coolant is reduced during operation.
Such coolants have a severely corrosive affect.
The maximum permissible period of use of the cool ant is for passenger car sad commercial vehicle engines (normal case) 3 years.
Before pouring fresh coolant into she system, flush the, used coolant out of the cooling system. Clean cooling system if severe soiling or oil contamination exist.

Disposing Of Coolants
Observe legal regulations and local wastewater regulations.