It is an automotive cooling-system vacuum filling and bleeding kit. It is used by mechanics to remove trapped air from a vehicle’s cooling system and refill the system with coolant more efficiently.
What it is used for
* Bleeding air from the cooling system
* Refilling coolant after coolant changes or repairs
* Creating a vacuum in the cooling system before filling
* Helping reduce air pockets, which can cause overheating or poor coolant circulation
* Checking the cooling system for possible leaks when used with appropriate testing procedure