42 Cooling System Water Specification CAUTION Volvo Trucks North America, Inc. does not recommend using plain water in the cooling system. Water alone is corrosive at engine operating temperatures and does not provide adequate boiling protection. The engine may develop corrosion and cavitation problems in engine and radiator, and the boiling point of the coolant is lowered compared with a proper antifreeze/water mixture. The warranty is not valid when using only water in the cooling system. Use clean water in the coolant mixture. DO NOT use hard tap water or salt softened tap water in the cooling system. If clean water is not available, using distilled water is ideal.
Water specification should be: If you are not sure of the quality of the water in your area, contact your Volvo Truck dealer, your local water department, agricultural agent or an independent laboratory to analyze the water. Parts per Million Grains per Gallon pH Value Chlorides, maximum 40 2.34 Sulfates, maximum 100 5.8 Silica, maximum 20 1.17 Iron, maximum 0.10 0.0058 Manganese, maximum 0.05 0.0029 Total dissolved solids, maximum 340 20 Total hardness, maximum 170 10 Water base/acid level 5.5 to 9