1. Coolant System Pressure Build-up: When the engine is started, the temperature rises rapidly, causing the coolant to expand and build pressure in the cooling system. If the pressure exceeds the system's capacity, it can force coolant out through leaks or weak points.
2. Faulty Radiator Cap: The radiator cap is responsible for maintaining the correct pressure level in the cooling system. A faulty or damaged radiator cap may allow coolant to leak when the pressure builds up.
3. Loose or Damaged Radiator Hoses: The hoses that connect the radiator to the engine and other components of the cooling system can become loose or damaged over time. This can lead to coolant leaks when the engine is running and pressure increases.
4. Cracked or Damaged Radiator: In extreme cases, a crack or damage to the radiator itself can cause coolant to leak when the engine is running. This is often caused by physical impact, corrosion, or age-related wear.
5. Faulty Water Pump: The water pump is responsible for circulating coolant through the engine. If the water pump seal is compromised or damaged, it can allow coolant to leak from the pump when the engine is running.
6. Head Gasket Failure: A blown or damaged head gasket can lead to coolant leaks as well. This occurs when the seal between the engine block and the cylinder head fails, allowing coolant to escape into the combustion chambers or mix with other fluids.
If you notice coolant leaking when starting the engine, it's essential to have your vehicle inspected by a qualified mechanic or automotive technician. They can diagnose the exact source of the leak and perform the necessary repairs to ensure the proper functioning of the cooling system.
