![]() ![]() Radiator Coolant Overflow Tank Function Diagram Is a Radiator Overflow Tank Necessary? It will remain in the tank until it’s needed by the engine once again. Expanded coolant can go into the overflow tank to cool down. With the added overflow tank, the pressure is better regulated. An over-pressurized cooling system can lead to boiling liquid that can burst through any weak spot. If it were to become too hot, the fluid would expand, causing major issues in the sealed system. However, the amount of coolant in the overflow tank will vary based on how much is needed to cool the engine at the time.Īs long as the system works as designed, the coolant should never rise too high in temperature. ![]() On the other hand, if there’s too much pressure, coolant will be pulled from the cooling system back into the overflow tank.īecause the cooling system is a closed unit, the amount of coolant within the system should never change. When the level in the cooling system gets too low, coolant is withdrawn from the storage to enter the cooling system. If you notice an oily surface in your coolant, immediately have your mechanic inspect your Grand Caravan for head gasket leakage.Conclusion How Does a Radiator Coolant Overflow Tank Work? Taking off the coolant reservoir cap on a warm engine could cause the cap to up explosively and fluid to spray out of the reservoir. See our video on how to add engine coolant for tips on adding coolant to your Grand Caravan.Īlways wear safety goggles when working on your Grand Caravan. If you need to add anti-freeze, be sure to check your owners manual to determine the correct type of coolant to add - in Dodges, it usually located in a section titled Fluid Capacities towards the end of your manual. The video above shows you where the coolant reservoir in your Grand Caravan is located and how to check the coolant / antifreeze level. Engine coolant / antifreeze circulates through your engine to keep it cool in the summer but won't freeze in the winter. In order to get an accurate reading, your 3.6 liter engine should be cool to the touch when you check it. Checking the engine coolant (also known as antifreeze) level in your 2013 Dodge Grand Caravan is pretty easy. ![]()
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