How Does An Coolant Overflow Tank Work? - Mechanic Base
https://mechanicbase.com/coolant/how-a-radiator-coolant-overflow-tank-works/
WebMar 6, 2023 · However, older vehicles didn’t come with an overflow tank. In these older cooling systems, multiple vents were used to allow the extra pressure out. With this system, there was an escape when the coolant got hot. The downside to this type of system is the pollution it creates.
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