You will probably never need to open the cap on the radiator but if you have to open the cap for any reason make sure to fill the radiator to the top with a 50 50 mixture of coolant and water before replacing the cap. Once the engine has cooled pull the hood release lever inside the car then reach under.

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Start adding the fluid in small amounts.

How much coolant to add. Before checking the radiator fluid the car should be turned off and allowed to sit until the radiator is. But try to maintain a good coolant level by adding a similar amount of straight coolant the next time you add liquid to the system. Don t pour all of the antifreeze at once or it could spill out of the radiator.

Only add enough 50 50 mixed coolant to the overflow tank when cool to reach or just cover the cold mark. Open the hood. For example if you want the coolant system to contain 50 percent of concentrated coolant then you would multiply 0 50 x 12 to get an amount of 6 liters.

To find out how much you need to add multiply the amount of coolant your vehicle can hold by the percentage of concentrated coolant you want to achieve. If that isn t the case and the system wasn t opened don t open it. Make sure the engine is cool.

Add the fluid to your radiator if your vehicle doesn t have an overflow tank. Part 1 of 2. To prevent spilling any of the fluid when you add it place a funnel inside of the opening of the radiator.

You should add a 50 50 mix of coolant in an amount equal to that which you drained out in order to perform the needed maintenance to the cooling system. Allow the fluid to bubble and settle. Check the radiator fluid.