How Do I Put Antifreeze in a Radiator?

By Staff WriterLast Updated Apr 4, 2020 5:25:16 AM ET

To add antifreeze to the radiator reservoir, unscrew the reservoir cap, and pour the coolant in the reservoir tank until it reaches the full line. You need antifreeze, otherwise known as radiator coolant, that is one part coolant and one part water. Do not remove the reservoir cap if the engine is still hot.

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