This SAE Information Report is applicable to all engine cooling systems used in heavy-duty vehicles, industrial applications, and automotive applications The purpose of this document is to list the requirements which are in general use for filling, deaeration, and drawdown of engine cooling systems for heavy-duty, industrial and automotive applications. Due to the differences in heavy duty and automotive cooling systems, they are dealt with in separate sections of this report. In the case of heavy duty, these procedures apply to both the main jacket water pump and separate circuit water pumps. The material presented in this document is for information purposes only, and does not constitute a SAE Standard.