Can Coolant Colors Be Mixed?

[PaisleeRose]

Coolant colors cannot be mixed. Mixing coolants with different chemical compositions can cause chemical reactions, rendering the coolant ineffective. The correct method for adding coolant is as follows: 1. Unscrew the radiator cap, open the radiator drain valve, and drain the coolant; 2. Insert a rubber hose into the radiator filler neck and flush the engine cooling system with tap water; 3. After draining the water from the cooling system, close the radiator drain valve; 4. Unscrew the reservoir cap and add coolant until the liquid level reaches the MAX mark; 5. Tighten the reservoir cap; 6. Start the engine and let it idle for 2 to 3 minutes, then unscrew the radiator cap to allow the cooling system to expel some air. The coolant level will drop, so top it up again to the MAX mark.