ASTM D7714 Standard Specification for Glycerin Base Engine Coolant for Automobile and Light-Duty Service
4. General Requirements
4.1 Engine coolant concentrates or prediluted glycerin base engine coolants shall be formulated with glycerin meeting Specification D7640, water, and suitable corrosion inhibitors, dye, and a foam suppressor.
4.2 All engine coolant concentrates or prediluted glycerin base engine coolants shall be in accordance with the general requirements given in Table 1.
4.3 Prediluted glycerin (Type II) base engine coolants shall be formulated using water that meets the following requirements:
NOTE 3 - Prediluted coolants are intended for direct addition to an engine cooling system with no further dilution. However, if circumstances require addition and prediluted aqueous engine coolant is not available, use the appropriate engine coolant concentrate (Type I) diluted to 50 volume % with water of at least the quality outlined in Table X1.1.
4.4 When diluting engine coolant concentrates for actual service, use municipal (treated) water, or low-mineral content well water (see Appendix X1, Table X1.1). If such water is not available, use deionized (demineralized) or distilled water. This procedure will minimize the formation of hard water scale and avoid the introduction of mineral components, such as chlorides and sulfates, which can increase the corrosion rate of aluminum and iron.
4.5 When installed in accordance with the vehicle manufacturer's recommendations and those on the product label, engine coolant concentrates or prediluted glycerin base engine coolants shall be suitable for use in a properly maintained cooling system (Appendix X1) in normal light-duty service for a minimum of one year without adversely affecting fluid flow and heat transfer.
5. Detailed Requirements
5.1 Glycerin base coolant concentrates and prediluted coolants shall be in accordance with the physical and chemical requirements prescribed in Table 2 depending on coolant type (see 1.2).
5.2 The requirements listed in Table 2 for prediluted coolant (Type II) are prescribed for the coolant as packaged, without further dilution or adjustment.
5.3 All coolant concentrates and prediluted coolants shall conform to the performance requirements listed in Table 3.
5.4 Coolant concentrates shall be diluted for performance testing as described in the individual ASTM test methods.
5.5 If necessary, the freezing point of prediluted coolants shall be adjusted with deionized water before proceeding with performance testing. The freezing point of prediluted glycerin base coolants (Type II) shall be -°27.0°C (-°16.6°F).
5.6 Adjusted, prediluted engine coolant performance test solutions shall be prepared as described in Table 3, Footnotes B through F.
6.1 engine coolant; engine coolant concentrate; glycerin; light duty engine coolant; prediluted engine coolant