MAINTENANCE NOTICE: Do not mix types of antifreeze solutions. Mixed solutions make it impossible to determine the protection against freezing. Antifreeze containing sealer or anti-leak additives should NOT be used in this system. Sealer or anti-leak additives will cause plugging problems in the cooling system. WARNING Use extreme caution when adding coolant to a hot radiator to avoid being burned. Wear gloves and goggles and keep face away from the filler neck. Check the solution periodically and at normal operating temperature, to be sure the cooling system has sufficient protection against freezing.
An antifreeze concentration greater than 68 percent will adversely affect antifreeze protection and heat transfer rates. Antifreeze concentrations between 68 percent and 100 percent actually have a higher freezing point than a 68 percent antifreeze concentration and should not be used due to reduced heat transfer rates. REMARK Do not use a 100 percent antifreeze solution for protection from freeze-up. Using 100 percent antifreeze will cause severe corrosion in the cooling system radiator and oil cooler core. Use a water/antifreeze solution as described in the following table. The following table shows the approximate percentage of antifreeze solution required for various temperatures.
In tropical climates where antifreeze availability may be limited, use a corrosion inhibitor or supplemental coolant additive (SCA), to protect the engine cooling system. 20.6.4 SUPPLEMENTAL COOLANT ADDITIVES 1. All supplemental cooling system additives, including those in antifreeze solutions, become depleted through normal operation. If the coolant additives in antifreeze are allowed to become depleted, the antifreeze becomes corrosive and attacks and coats the metallic surfaces of the cooling system which reduces heat transfer. Cooling system conditioners which contain these additives must be added to maintain corrosion protection. 2.
SOLUBLE OIL IS NOT RECOMMENDED for use in this engine as its use will reduce heat transfer and allow internal engine damage. 3. Miracle additives will not increase heat transfer or prevent overheating. Conditioned water is the best coolant. WA450-3MC 3-13 Approximate Freezing Point Percentage of Antifreeze Concentration by Volume Specific Gravity at 16 0 (+32 -7 (+20 -12 -18 -23 (-10 -29 (-20 -34 (-30 -40 (-40 -46 (-50 -51 (-60 -57 (-70 -62 (-80 -68 (-90 -69 (-92 0 15 25 33 40 45 48 53 56 59 62 65 67 68 1.000 1.025 1.040 1.053 1.062 1.070 1.074 1.080 1.083 1.088 1.092 1.095 1.097 1.098