1. Faulty Heater Core: The heater core is a component of the vehicle's heating system located inside the dashboard on the passenger side. It is responsible for circulating hot coolant through the vehicle's interior to provide warmth. If the heater core develops a leak, coolant can accumulate inside the passenger compartment and leak out after you turn off the engine.
2. Damaged Cooling System Hoses: The cooling system consists of hoses that carry coolant between the radiator, engine, and other components. If a hose connected to the passenger side of the engine or heater core becomes cracked, loose, or damaged, it can leak coolant when the engine is turned off and the pressure in the system decreases.
3. Defective Hose Connections: The points where cooling system hoses connect to the engine, heater core, or radiator can develop leaks over time due to wear, corrosion, or poor maintenance. If a hose connection becomes loose or the seal fails, coolant can leak from these areas after the engine is turned off.
4. Cracked or Damaged Engine Components: In some cases, a crack or damage to the engine block, cylinder head, or other components on the passenger side of the engine can cause coolant to leak. These types of leaks are often more severe and may require significant repairs or engine replacements.
5. Failed Water Pump Gasket: The water pump, which is usually driven by the engine's timing belt or chain, circulates coolant throughout the system. A faulty gasket between the water pump and the engine block can cause coolant to leak from the passenger side near the water pump.
To properly diagnose and fix the coolant leak, it's recommended to consult with a qualified mechanic who can inspect the vehicle, identify the source of the leak, and recommend appropriate repairs.
