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Coolant Water
The minerals (calcium and magnesium) in hard water can combine with cooling system conditioner additives (silicates and phosphates) to drop out of solution and collect inside the radiator.The minerals (silicates, phosphates, calcium and magnesium) can also accumulate onto hot engine surfaces and reduce the effectiveness of the cooling system, especially after a number of heating and cooling cycles.Distilled water is recommended because of less mineral drop out (potential or severity) than hard or tap water. Tap water, artificially softened with salt, is not recommended for use in your engine's cooling system. Use water that meets the minimum acceptable water requirement to prevent drop-out of these chemical compounds.To determine your water characteristics, contact the local water department, agricultural agent or an independent laboratory to perform the testing service.Antifreeze
Caterpillar recommends that the coolant mix contain a minimum of 30% Caterpillar Antifreeze, or equivalent and acceptable water to maintain an adequate cavitation temperature for efficient water pump performance.Premix coolant solution to provide protection to the lowest expected outside (ambient) temperature. Pure undiluted antifreeze will freeze at -10°F (-23°C).Only use a greater concentration (above 30%) of Caterpillar Antifreeze as needed for anticipated outside (ambient) temperatures. Do not exceed a coolant mixture of 60% antifreeze to water since a concentration above 60% antifreeze will reduce the engine's freeze protection and increase the possibility of deposit formation in the cooling system.
Use Caterpillar Antifreeze or ASTM D4985-89 (GM Specification 6038-M) Antifreeze. Caterpillar Antifreeze is available through your Caterpillar dealer in quantities that follow. Most commercial antifreezes are formulated for gasoline engine applications and will, therefore, have high silicate content. Caterpillar Antifreeze is formulated with a low silicate content and the proper coolant additives for heavy duty diesel engines. Caterpillar does not recommend use of high silicate antifreeze in the 3176 engine.ASTM D4985-89 (GM Specification 6038-M) is a low silicate antifreeze, but supplemental coolant additive must be added. Make proper antifreeze additions.Adding pure antifreeze as a makeup solution for cooling system top-off is an unacceptable practice. It increases the concentration of antifreeze in the cooling system which increases the concentration of dissolved solids and undissolved chemical inhibitors in the cooling system. Add antifreeze mixed with acceptable water to the same freeze protection as your cooling system. Use the chart below to assist in determining the concentration of antifreeze to use. Check the coolant solution frequently in cold weather for glycol concentration with the 5P0957 or 5P3514 Coolant Tester to ensure adequate protection. Both testers are identical except temperature scale. They give immediate, accurate readings and can be used for antifreeze/coolants that contain ethylene or propylene glycol. Both are available at your Caterpillar dealer.If propylene glycol based antifreeze is used, DO NOT allow concentration greater than a 50/50 antifreeze to water mixture. The measurement of freeze protection must be made with a refractive-type tester (5P0957 or 5P3514) rather than a hydrometer-type, which can be used to test ethylene glycol based antifreeze.Supplemental Coolant Additive (Conditioner)
Supplemental coolant additive (conditioner) is necessary to prevent rust, scale, pitting and/or corrosion
The minerals (calcium and magnesium) in hard water can combine with cooling system conditioner additives (silicates and phosphates) to drop out of solution and collect inside the radiator.The minerals (silicates, phosphates, calcium and magnesium) can also accumulate onto hot engine surfaces and reduce the effectiveness of the cooling system, especially after a number of heating and cooling cycles.Distilled water is recommended because of less mineral drop out (potential or severity) than hard or tap water. Tap water, artificially softened with salt, is not recommended for use in your engine's cooling system. Use water that meets the minimum acceptable water requirement to prevent drop-out of these chemical compounds.To determine your water characteristics, contact the local water department, agricultural agent or an independent laboratory to perform the testing service.Antifreeze
Caterpillar recommends that the coolant mix contain a minimum of 30% Caterpillar Antifreeze, or equivalent and acceptable water to maintain an adequate cavitation temperature for efficient water pump performance.Premix coolant solution to provide protection to the lowest expected outside (ambient) temperature. Pure undiluted antifreeze will freeze at -10°F (-23°C).Only use a greater concentration (above 30%) of Caterpillar Antifreeze as needed for anticipated outside (ambient) temperatures. Do not exceed a coolant mixture of 60% antifreeze to water since a concentration above 60% antifreeze will reduce the engine's freeze protection and increase the possibility of deposit formation in the cooling system.
Use Caterpillar Antifreeze or ASTM D4985-89 (GM Specification 6038-M) Antifreeze. Caterpillar Antifreeze is available through your Caterpillar dealer in quantities that follow. Most commercial antifreezes are formulated for gasoline engine applications and will, therefore, have high silicate content. Caterpillar Antifreeze is formulated with a low silicate content and the proper coolant additives for heavy duty diesel engines. Caterpillar does not recommend use of high silicate antifreeze in the 3176 engine.ASTM D4985-89 (GM Specification 6038-M) is a low silicate antifreeze, but supplemental coolant additive must be added. Make proper antifreeze additions.Adding pure antifreeze as a makeup solution for cooling system top-off is an unacceptable practice. It increases the concentration of antifreeze in the cooling system which increases the concentration of dissolved solids and undissolved chemical inhibitors in the cooling system. Add antifreeze mixed with acceptable water to the same freeze protection as your cooling system. Use the chart below to assist in determining the concentration of antifreeze to use. Check the coolant solution frequently in cold weather for glycol concentration with the 5P0957 or 5P3514 Coolant Tester to ensure adequate protection. Both testers are identical except temperature scale. They give immediate, accurate readings and can be used for antifreeze/coolants that contain ethylene or propylene glycol. Both are available at your Caterpillar dealer.If propylene glycol based antifreeze is used, DO NOT allow concentration greater than a 50/50 antifreeze to water mixture. The measurement of freeze protection must be made with a refractive-type tester (5P0957 or 5P3514) rather than a hydrometer-type, which can be used to test ethylene glycol based antifreeze.Supplemental Coolant Additive (Conditioner)
Supplemental coolant additive (conditioner) is necessary to prevent rust, scale, pitting and/or corrosion