What Are the Reasons for Low Car Coolant?
2 Answers
The reasons for low car coolant are: 1. Thermostat failure; 2. Louvers stuck in the fully open position; 3. Fan clutch sintering, electric fan running continuously; 4. Low ambient temperature; 5. Coolant temperature gauge or sensor malfunction. The functions of car coolant are: antifreeze, anti-corrosion, and anti-scale. The steps for adding car coolant are: 1. Unscrew the radiator cap and open the radiator drain valve; 2. Insert a rubber tube into the radiator; 3. Flush the radiator with water; 4. Drain the water and close the radiator drain valve; 5. Pour antifreeze into the radiator filler hole; 6. Tighten the radiator cap and reservoir cap; 7. Start the engine and let it idle for 3 minutes; 8. Top up the antifreeze to the MAX mark.
As a seasoned mechanic with years of experience in the auto factory, I often encounter several main causes for low coolant levels: cracks in the radiator or hoses leading to leaks, which may be caused by aging or accidental scrapes; another major issue is wear and tear on the water pump's sealing ring, allowing fluid to seep out from the shaft seal; there's also the problem of engine cylinder gasket erosion causing internal leaks, where coolant escapes into the oil passages and gets consumed; seasonal changes, such as increased evaporation rates during hot summers, can lead to shortages if not regularly topped up; and lastly, neglecting routine checks can naturally result in lower levels. Remember to check for any oil contamination—if you see milky white foam, it's likely a sign of cylinder gasket damage. The cooling system is crucial for maintaining engine temperature control, so it's advisable to check the coolant level monthly and top up with antifreeze in time to prevent overheating and engine damage.
