What are the consequences of a vehicle lacking coolant?

[Dave]

Without coolant, the car's engine and radiator lose protection. A lack of coolant affects the radiator's heat dissipation efficiency, failing to achieve proper cooling. The inability to circulate coolant normally can lead to overheating and, in severe cases, cause engine damage. In cold climates, it may also result in the engine or radiator freezing, leading to engine failure and rendering the vehicle unusable. Methods to determine if coolant is low: Observe the coolant warning light on the dashboard. If it lights up, it likely indicates low coolant, though it could also be due to excessively high cylinder temperatures. Check the coolant reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving; promptly add coolant. Inspect the water level markings on the coolant tank. Normal coolant levels should be between the maximum and minimum marks. To check if coolant is low, observe the markings. If the coolant is below the minimum mark, it indicates a deficiency.

[Lena]

I almost caused a major disaster last time by neglecting the coolant. In summer, the engine overheated directly, and the temperature gauge shot up to red. I had to pull over immediately, or it could have led to a blown head gasket or even engine failure. Winter is even more dangerous—plain water freezes and expands, which can crack the radiator or pipes, leading to costly repairs. Coolant isn't just for antifreeze; it also prevents internal corrosion and scaling. Without it, car parts rust faster, and the water pump is prone to failure. Checking it is simple: open the engine hood and ensure the level in the overflow tank is between MIN and MAX. New cars can go four to five years without a coolant change, but for older cars, it's recommended to replace it every two years. Don't cut corners by just adding water. I've found that regular maintenance saves a lot of hassle, especially testing before long drives. Ignoring this could mean sudden breakdowns, towing fees, and repairs costing thousands.