1. Water Pump Failure: The water pump is responsible for circulating coolant throughout the engine. If the seal or gasket on the water pump fails, it can cause a leak. Check for any visible leaks around the water pump and inspect the pump for any damage.
2. Heater Core Hose: The heater core hose transports coolant from the engine to the heater core, which provides warmth inside the vehicle. If the hose becomes cracked or damaged, it can leak coolant. Check the condition of the heater core hose and replace if necessary.
3. Radiator Hoses: The radiator hoses carry coolant from the engine to the radiator, where it is cooled down. If the hoses become cracked, loose, or damaged, it can result in a coolant leak. Inspect the hoses and tighten or replace any that are loose or worn.
4. Freeze Plugs: Freeze plugs are located on the engine block to prevent cracking in case of coolant freezing. If a freeze plug becomes damaged or dislodged, it can cause a coolant leak. Check for any signs of leakage around the freeze plugs. Replace any that are damaged or leaking.
5. Head Gasket Failure: In severe cases, a coolant leak on the passenger side of the engine could indicate a head gasket failure. This occurs when the gasket between the engine block and cylinder head fails, allowing coolant to leak into the combustion chambers. Symptoms include white or milky-looking engine oil, overheating, and rough engine operation. Head gasket replacement is a major repair and is best left to a qualified mechanic.
