Possible reasons for overheating despite adding coolant:
* Radiator Leak: The radiator itself might have a leak, either a small hole or a failing seal. Inspect the radiator carefully for any signs of damage, rust, or leaks.
* Water Pump Failure: The water pump circulates coolant through the engine. A failing pump won't move the coolant effectively, leading to overheating.
* Thermostat Issues: A stuck closed thermostat will prevent coolant from flowing properly.
* Fan Issues: The cooling fan might not be working correctly, failing to draw enough air across the radiator.
* Low Coolant Level (despite adding): A persistent leak somewhere in the system (e.g., hose, radiator, head gasket) may be continuously draining the coolant. A pressure test may be needed to identify this.
* Head Gasket Failure: This is a more serious issue where coolant is mixing with engine oil or being expelled into the exhaust. Check your oil for milky residue (indicating coolant contamination).
* Clogged Radiator: The radiator fins may be clogged with debris, reducing airflow.
Recommendation:
Since you've added coolant and the car still overheats, do not continue to drive the car. Driving an overheating car can cause severe and expensive engine damage. Take your Aveo to a mechanic for a proper diagnosis. They have the tools and expertise to pinpoint the problem and perform the necessary repairs. Describing the symptoms accurately (overheating even after adding coolant) will help them efficiently diagnose the issue.
