When refilling a vehicle’s cooling system, often there are high-points or tiny passages that need to be bled to prevent the engine from over-heating. The award-winning Airlift™ tool is designed to eliminate airlocks while refilling a cooling system. Refills the entire cooling system including the Heater Core. Eliminates time consuming bleeding and purging. Check for leaks while under vacuum. Works on Cars, Trucks and Off Road Vehicles.