COOLER AS-OIL 2451361 - Caterpillar

All Caterpillar diesel engines equipped with air-to-air aftercooling (ATAAC) require a minimum of 30 percent glycol to prevent water pump cavitation.
Never use water alone without Supplemental Coolant Additives (SCA) or without inhibited coolant. Water alone is corrosive at engine operating temperatures. Water alone does not provide adequate protection against boiling or freezing.
Note: Premix the coolant solution in order to provide protection to the lowest ambient temperature that is expected.Note: Pure undiluted antifreeze freezes at −23 °C (−9 °F).In engine cooling systems that use water alone, Caterpillar recommends the use of SCA. SCA helps to prevent the following conditions from occurring:
Corrosion
Formation of mineral deposits
Cavitation erosion of the cylinder liner
Foaming of the coolantIf Caterpillar SCA is not used, select a commercial SCA. The commercial SCA must provide a minimum of 2400 mg/L or 2400 ppm (140 grains/US gal) of nitrites in the final coolant mixture.The quality of the water is a very important factor in this type of cooling system. Distilled water or deionized water is recommended for use in cooling systems. If distilled water or deionized water is not available, use water that meets the minimum requirements that are listed in the table for recommended water properties in this publication, "General Coolant Information" topic (Maintenance Section).A cooling system that uses a mixture of SCA and water only needs more SCA than a cooling system that uses a mixture of glycol and water. The SCA concentration in a cooling system that uses SCA and water should be six to eight percent by volume. Refer to Table 1 for the amount of SCA that is required for various capacities of the cooling system.
Table 1
Caterpillar SCA Requirements for SCA and Water Cooling Systems
Cooling System Capacity Caterpillar SCA at Initial Fill Caterpillar SCA at 250 Hours
22 to 30 L (6 to 8 US gal) 1.75 L (64 fl oz) 0.44 L (15 fl oz)
31 to 38 L (9 to 10 US gal) 2.30 L (80 fl oz) 0.57 L (20 fl oz)
39 to 49 L (11 to 13 US gal) 3.00 L (100 fl oz) 0.75 L (25 fl oz)
50 to 64 L (14 to 17 US gal) 3.90 L (128 fl oz) 0.95 L (32 fl oz)
65 to 83 L (18 to 22 US gal) 5.00 L (168 fl oz) 1.25 L (42 fl oz)
84 to 110 L (23 to 29 US gal) 6.60 L (224 fl oz) 1.65 L (56 fl oz)
111 to 145 L (30 to 38 US gal) 8.75 L (296 fl oz) 2.19 L (74 fl oz)
146 to 190 L (39 to 50 US gal) 11.50 L (392 fl oz) 2.88 L (98 fl oz)
191 to 250 L (51 to 66 US gal) 15.00 L (512 fl oz) 3.75 L (128 fl oz) Refer to Table 2 for part numbers and for quantities of SCA.
Table 2
Caterpillar Liquid SCA
Part Number Quantity
6V-3542 0.24 L (8 oz)
111-2372 0.36 L (12 oz)
8T-1589