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In a Car:

A tank to hold "overflow". When fluids heat up, they expand, and like radiator fluid, they need a place to go until they cool.

Some cars keep these under some pressure, and if there is a leak, then an engine light will now come on. In the older cars, a leak in this tank would be a minor problem because you'd loose fluid when it leaked out of the overflow.

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Alphonso Nicolas

Lvl 10
2y ago
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Q: What is reservoir tank?
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