Most vehicles now employ an expansion tank that allows the coolant to expand, and exit, the cooling circuit when hot, and to return when the car is turned off and the engine cools. The cooling ...

Pro Tip: Leave the car raised while you refill the radiator to allow air pockets to escape from the engine. Slowly fill the radiator or coolant tank with fresh coolant until the coolant is 1 in.

Modern cars like the Skoda have sealed cooling systems which means they shouldn’t need regular top-ups. As the engine heats up and the coolant expands, any excess coolant is captured by an overflow ...