Haval H6 antifreeze tank is hidden behind the bumper. You can find it by opening the grille on the right side of the engine compartment. The process of adding antifreeze to Harvard H6 is as follows: drain antifreeze 1 to ensure that the engine and radiator are in a cold state. 2. Place a large basin under the radiator drain cock and carefully open the cock. Drain the coolant into the sink. 3. Carefully pour the coolant into a sealed container for treatment. Fill new antifreeze 1 to ensure that the engine and radiator are cold and the drain cock at the bottom of the radiator is closed. 2. Check the user manual to determine the mixing ratio of antifreeze and water in the coolant and the appropriate filling amount. 3. Put the funnel into the radiator neck. 4. Carefully pour the recommended amount of antifreeze into the radiator through the funnel and radiator neck. 5, according to the mixture ratio of water. 6. Install the radiator cover, preferably a new cover. 7. Fill the recovery container with coolant according to the manufacturer's suggestion. 8. Run the engine, exhaust the air entering the coolant, and then check the coolant level again.