COOLANT (1:4)

It seems like you've mentioned "COOLANT (1:4)," but it's not entirely clear what you're referring to. "COOLANT (1:4)" typically indicates a mixture ratio of coolant to water, commonly used in automotive applications to maintain the proper temperature of the engine. In a 1:4 ratio, this would mean mixing one part coolant with four parts water.

Coolant, also known as antifreeze, is a liquid used to regulate the temperature of an engine by transferring heat away from the engine and dissipating it through the radiator. The mixture ratio is important to prevent freezing in cold temperatures and to provide proper heat dissipation in warmer conditions.