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A non-aqueous engine coolant is a glycol, diol, triol, or mixtures thereof, based heat transfer fluid containing less than 1.0 % water when formulated and intended for final use without dilution with water. (Definition from Terminology D4725.) This specification covers the requirements for fully-formulated non-aqueous glycol base coolants for cooling systems of heavy-duty engines. These coolants will function effectively during both winter and summer to provide protection against corrosion, cavitation, freezing, boiling, and excessive viscosity.
Formerly under the jurisdiction of Committee D15 on Engine Coolants and Related Fluids, this specification was withdrawn in October 2019. This standard is being withdrawn without replacement on the basis that there is insufficient fleet test data to support satisfactory performance in on-road heavy-duty diesel engines. It is being withdrawn until long-term field test data has been developed on non-aqueous coolants in on-road heavy-duty diesel engines to demonstrate satisfactory performance.
1.1 A non-aqueous engine coolant is a glycol, diol, triol, or mixtures thereof, based heat transfer fluid containing less than 1.0 % water when formulated and intended for final use without dilution with water. (Definition from Terminology .)
1.2 This specification covers the requirements for fully formulated non-aqueous glycol base coolants for cooling systems of heavy-duty engines. These coolants will function effectively during both winter and summer to provide protection against corrosion, cavitation, freezing, boiling, and excessive viscosity.
1.3 This specification is intended to cover the requirements for non-aqueous engine coolants prepared from virgin glycols, diols, or triols, or mixtures thereof.
1.4 Coolants meeting this specification exhibit very low vapor pressures under all operating conditions, thereby avoiding the creation and collapse of coolant vapor, the primary cause of pump and cylinder liner cavitation erosion. They may additionally contain additives that provide traditional anti-cavitation erosion coatings but there is no requirement that they must. Non-aqueous engine coolants usually contain one or more carboxylates and do not normally contain nitrites. It is suggested that coolant testing be undertaken at normal manufacturer’s recommended intervals to monitor degradation products. The low vapor pressures inherent in coolants that meet this specification also provide protection from hot surface scaling, as liquid coolant is in contact with all hot metal surfaces of the engine cooling system at all times.
1.5 Water is a contaminant to non-aqueous engine coolants and it is suggested that water content be tested periodically with test strips to ideally keep water content of the coolant at 3 % or less. Increases in water cause an undesirable drop in the boiling point. It is instructive that the glassware corrosion testing per this specification is conducted at 6 % corrosive water.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4725 Terminology for Engine Coolants and Related Fluids
D5827 Test Method for Analysis of Engine Coolant for Chloride and Other Anions by Ion Chromatography
D6210 Specification for Fully-Formulated Glycol Base Engine Coolant for Heavy-Duty Engines
D7583 Test Method for John Deere Coolant Cavitation Test
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ASTM D8116-18, Standard Specification for Fully-Formulated Non-Aqueous Engine Coolant for Heavy-Duty Engines (Withdrawn 2019), ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top