https://dannysengineportal.com/coolant-recovery-tank-no-tank-overflow-tank-expansion-tank/
A coolant recovery tank, is a tank designed to collect hot coolant from the radiator, as the coolant expands.
However, as the engine cools down, the coolant in the radiator contracts, creating a vacuum in the radiator.
As a result, this vacuum draws coolant back into the radiator. So, it’s full at all times, preventing air locks.
#engineportal #overheating #enginecoolant #overflowtank