Coolant is a liquid that is specifically designed to circulate through the engine and radiator of a vehicle to regulate engine temperature. It helps to prevent the engine from overheating or freezing and also helps to lubricate the water pump and other components of the cooling system.
Water, on the other hand, does not have the same properties as coolant and can actually cause damage to the engine if used for an extended period of time. Water does not contain the necessary additives to prevent corrosion and can also cause the formation of scale and deposits in the cooling system. Additionally, water has a lower boiling point than coolant and can evaporate more easily, leading to overheating.
If you find yourself in an emergency situation where you need to add liquid to your Volkswagen Jetta's cooling system, you can use water as a temporary measure. However, it is important to have the coolant replaced with a proper coolant mixture as soon as possible.
