1.1 本实践涵盖了评估乘用车、轻型卡车服务中发动机冷却液防腐和性能的最新程序，该程序密切模仿了车辆和发动机制造商的现行实践。 附注1: 车辆服务中的冷却剂评估可能需要相当多的时间和费用；因此，产品应在实验室进行普遍可接受性的预测试。典型的测试从小型、严格控制的测试到严格控制并不总是可行的大型测试不等。最常引用的实验室检测方案在质量标准中定义 D3306 , D7714 ，和 D7715 . 1.2 本实践中引用的单位应被视为标准单位。括号中给出的值是仅供参考的近似值。 1.3 本标准无意解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定法规限制的适用性。 第 节给出了具体的注意事项声明 7 . 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 = 意义和用途 ===== 5.1 从使用本实践中获得的数据将为评估乘用车和轻型卡车服务中的冷却液性能提供基础（根据所选的测试）。所获得的数据还可用于为从模拟服务和发动机测功机测试获得的数据提供额外的显著性。

1.1 This practice covers an updated procedure for evaluating corrosion protection and performance of an engine coolant in passenger car, light truck service that closely imitates current vehicle and engine manufacturers’ practices. Note 1: Coolant evaluation in vehicle service may require considerable time and expense; therefore, the product should be pretested in the laboratory for general acceptability. Typical tests vary from small, closely controlled tests, to large tests where close control is not always practical. The most often referenced protocols for laboratory testing are defined in Specifications D3306 , D7714 , and D7715 . 1.2 The units quoted in this practice are to be regarded as standard. The values given in parentheses are approximate equivalents for information only. 1.3 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. Specific precautionary statements are given in Section 7 . 1.4 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. ====== Significance And Use ====== 5.1 The data obtained from the use of this practice will provide a basis for the evaluation of coolant performance in passenger car, and light-duty truck service (according to the test chosen). The data obtained may also be used to provide added significance to the data obtained from simulated service and engine dynamometer tests.