If necessary, the water must be treated (e.g. Information about the quality of the water they supply. Tap water with drinking water quality usually fulfils these requirements. Total hardness, max.: 3.6 mmol Ca 2+/ltr.Total hardness, max.: 20° dH (German hardness grade) or in new unit of measurement:.The amounts of coolant required for protection against freezing are stated (percentage values) on theĬontainers. (heat transfer) and protection against freezing-up is modified in the opposite direction, i.e. Too high a concentration, more than 55 % down to -47☌, leads to deterioration of the cooling properties This means that it is essential that an antifreeze and corrosion inhibitor is added even in the tropics. When the waterĬontent is too high, this can lead to premature excess temperature in very hot weather or hot climates andĪs a consequence lead to coolant being ejected out of the system and damage to the engine through excess Only the degree of protection against freezing, but also corrosion protection is reduced. the water content is higher than 60 %), not
If the proportion of antifreeze is less than 40 % to -29 ☌ (i.e. The original coolant mixture for the initial filling at the factory has this antifreeze-to-water ratio. Prescribed mixture for coolant:ĥ0 % antifreeze for antifreeze protection up to -40 ☌ To create these coolant properties, the antifreeze and corrosion inhibitors must be mixed to the correct They must guarantee the consistency of the above-mentioned quality criteria.They must be neutral with respect to rubber parts and plastic parts in the coolant circuit.They must protect metal parts that come into contact with the coolant (grey cast iron, steel, aluminiumĪlloy, brass, copper and solder) against corrosion and cavitation.The freezing point) and in summer (prevent boiling and boiling over of the coolant). They must guarantee operability of the cooling system in winter (anti-freezing protection by lowering.The filling and maintenance instructions to be found in the Repair InstructionsĪnd operating instructions must be observed.Īntifreeze agents must meet the following requirements: The cooling systems of BMW vehicles must only be filled with the anti-freeze and corrosion inhibitorsĪpproved for the purpose. Of the cooling system is only guaranteed once a suitable antifreeze and corrosion inhibitor, or antifreeze Pure water is unsuitable as a coolant not just because of the lack of antifreeze properties. Many different materials, as well as protecting these from degradation.īelow you will find information from BMW's technical archives (Dated: 02/2019) At the same time it needs to be compatible with This is an exciting topic, coolantįluid is not just about protecting the engine from frost. In this context taking care of, means selecting the correct coolant fluid. We also want to supply the information, you need to take good Coolant fluid, not just frost protection!Īt Koed we want not just supply your parts.
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