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Car Overheating Full of Coolant

If your car is overheating despite having a full coolant level, there could be several possible reasons for this issue. Here are a few things you can check and consider:

1. Coolant circulation

Ensure that the coolant is circulating properly throughout the engine. A malfunctioning water pump, thermostat, or radiator fan can hinder the coolant flow and cause overheating.

2. Coolant mixture

Check the coolant mixture ratio. An improper ratio of coolant to water can affect the coolant's ability to dissipate heat efficiently. The ideal coolant-to-water ratio typically ranges between 50:50 and 70:30, depending on the climate.

3. Radiator blockage

Inspect the radiator for any obstructions. Dirt, debris, or bugs may accumulate on the radiator's surface, reducing airflow and causing overheating. Clean the radiator fins carefully or have a professional service it.

4. Cooling system leaks

Examine the cooling system for any leaks. Even a small coolant leak can lead to an insufficient coolant level, which can result in overheating. Inspect the radiator, hoses, water pump, and heater core for signs of leakage.

5. Radiator cap

Check the radiator cap's condition. A faulty or worn-out cap may not maintain the required pressure, leading to boiling coolant and subsequent overheating. Consider replacing the cap if necessary.

6. Thermostat malfunction

A malfunctioning thermostat can cause the coolant to stay closed off from the engine or radiator, leading to overheating. Have the thermostat checked or replaced if needed.

7. Cooling system blockage

In some cases, the cooling system may develop blockages due to scale, rust, or debris buildup over time. This can impede the flow of coolant, causing overheating. Flushing the cooling system may help remove these blockages.

If you're unable to identify the cause or resolve the issue yourself, it's advisable to consult a qualified mechanic who can diagnose and repair the problem more accurately.

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