NIPPLE AS- 4216210 - Caterpillar

Coolant Recommendations
During shipping and storage, the engine must be protected from damage that can be caused by freezing of the cooling system. If the engine is shipped to a site with freezing temperatures and/or if the engine is stored in a location with freezing temperatures, the cooling system must contain antifreeze that will withstand the lowest ambient temperature. Frequently check the concentration of glycol in the coolant/antifreeze. Make sure that the concentration is adequate in order to prevent freezing. Otherwise, the cooling system must be completely drained.Coolant or antifreeze is normally composed of three elements: water, glycol and additives. Each element must meet specific guidelines.Water
Deionized water or distilled water is recommended for use in engine cooling systems. If distilled water or deionized water is not available, use water with the properties that are listed in Table 2.
Table 2
Caterpillar Minimum Acceptable Water Requirements    
Property    Maximum Limit    ASTM Test    
Chloride (Cl)    
40 mg/L (2.4 grains per US gal)     "D512", "D4327"    
Sulfate (SO4)    
100 mg/L (5.9 grains per US gal)     "D516"    
Total Hardness    
170 mg/L (10 grains per US gal)     "D1126"    
Total Solids    
340 mg/L (20 grains per US gal)     "D1888"    
Acidity     pH of 5.5 to 9.0     "D1293"    
Use of water that does not meet the recommendations for the cooling system will damage the cooling system.Do not use these types of water in the cooling system: sea water, softened water that has been conditioned with salt, hard water and tap water.Only use water that meets the recommendations for the cooling system.
If you are not sure about the properties of your water, consult one of the following sources for a water analysis:
Caterpillar dealer
Local water utility company
Agricultural agent
Independent laboratoryGlycol
Do not use Extended Life Coolant (ELC) with Cat Gas Engines.ELC was not formulated for use in Cat Gas Engines.Do not use heat transfer fluids in Cat Gas Engines.Use only the coolant/antifreeze that is recommended.
Preferred - Cat NGEC (Natural Gas Engine Coolant)Alternatively, use Cat DEAC (Diesel Engine Antifreeze/Coolant) or a commercial heavy-duty coolant/antifreeze that meets "ASTM D6210" or "ASTM D4985" specifications.
Do not use a commercial coolant/antifreeze that only meets the ASTM "D3306" specification. This type of coolant/antifreeze is made for light duty automotive applications.Use only the coolant/antifreeze that is recommended.
Acceptable - In applications that do not require protection from boiling or from freezing, a mixture of Cat SCA and water that meets the properties that are listed in Table 2 is acceptable.Note: The preferred coolant/antifreeze and the acceptable mixture of SCA and water require different concentrations of SCA. Refer to the Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations", "Supplemental Coolant Additive (SCA)" topic.Table 3 is a list of the coolant/antifreeze that is recommended for Cat Gas Engines. The service life of the coolant/antifreeze that is used in Cat Gas Engines is also listed. To achieve this service life, the coolants must be properly maintained. The maintenance program includes S O S coolant