Cooling System: Description and Operation

Water quality

The water that may be used in Volvo engine cooling systems together with Volvo original coolant must meet certain requirements. Tap water, for example, contains too much chlorine, minerals and salts. Water that does not meet the requirements according to the specification can cause corrosion and deposits in the cooling system even if the water is mixed with coolant. See specification.





If in doubt about whether the water meets the requirements according to the specification, Volvo original coolant must be mixed 50/50 with distilled water (battery water) or ready mixed Volvo original coolant must be used.

When changing coolant or components in the cooling system, the system must be flushed clean with water that meets the specification or with distilled water. Alternatively the cooling system can be flushed with ready mixed Volvo original coolant.