How do I check coolant or antifreeze?

Checking antifreeze is very easy.

There is no need to remove the cap on the radiator. Just check to see if the liquid reaches the “full” mark on the side of the reservoir. If it doesn’t, add a 50/50 mix of water and antifreeze. Some coolants are premixed, so read the instructions on the container to see if you need to add water or can use it as-is.

Only add water to the coolant system in an emergency. If this happens, you’ll have to do a complete flush and change the coolant if the water concentration is above 60% in the coolant after the top-up.