4.3 Coolant Consumables General In liquid-cooled engines, the coolant must be conditioned and monitored because otherwise the engine could be damaged. z Corrosion z Cavitation z Freezing The water must be conditioned in case of devi- ations in the analysis values. z pH value too low: Add diluted caustic soda or potassium soda. Small test mixtures are recommended. z Total hardness too high: Mix with softened water (pH-neutral condensate or water sof- tened by ion exchanger) z Total hardness or carbon hardness too low: Mix with harder water (harder water is usually available in the form or drinking wa- ter) z Chloride and or sulphates too high:
Mix with softened water (pH neutral condensate or water softened by ion exchanger) Water quality The right water quality is important for conditio- ning the coolant. Clear, clean water within the following analysis values must always be used: 4 1) Carbonate hardness proportion of the total hardness min. 3 dGH Information about the water quality is available from local waterworks. A test case can be re- quested from your DEUTZ partner under the order for checking your water quality (order no. 1213 0382). 25 Analysis values min. max. ph-value at 20 °C 6,5 8,5 Chloride-ion content [mg/dm³] - 100 Sulfate-ion content [mg/dm³] - 100 Total hardness1) [°dGH] 3 12