1. Functions
– Heat Dissipation: The radiator transfers heat from the engine to the coolant, which then circulates through the radiator, where the heat is dissipated into the air.
– Temperature Regulation: It prevents the engine from overheating or running too cold, maintaining the ideal operating temperature.
2. Structure
– Fins: These increase the surface area for heat exchange, enhancing cooling efficiency.
– Water Tubes: Channels through which the coolant flows, typically made of aluminum or copper.
– Fan: Assists airflow at low speeds or when the vehicle is stationary, improving heat dissipation.
– Tank: Stores the coolant, divided into upper and lower sections. The upper tank connects to the engine, while the lower tank connects to the water pump.
3. Working Principle
1. Coolant Circulation: The coolant absorbs heat from the engine and flows through the radiator.
2. Heat Dissipation: As the coolant passes through the radiator, heat is transferred to the fins and dissipated into the air.
3. Coolant Return: The cooled liquid returns to the engine to continue the cycle.
4. Common Issues
– Leakage: Aging or damage to the radiator can cause coolant leaks.
– Clogging: Impurities or scale buildup may block the water tubes, reducing cooling efficiency.
– Fan Failure: A malfunctioning fan can lead to inadequate cooling, especially at low speeds.
5. Maintenance
– Regular Inspections: Ensure there are no leaks or blockages.
– Cleaning: Periodically clean the fins to prevent dust accumulation.
– Coolant Replacement: Follow the manufacturer’s recommendations for coolant changes to prevent corrosion and scale buildup.
6. Symptoms of Failure
– High Engine Temperature: The dashboard temperature warning light may activate.
– Low Coolant Level: Frequent need to top up the coolant.
– Engine Overheating: This can result in reduced performance or engine stalling.
| Serial Number | Inspection Item | Unit | Standard Requirements | Inspection Results | Single - item Judgment |
|---|---|---|---|---|---|
| 1 | Difference between the Two Diagonals of the Core | mm | ≤3 | 1 | Qualified |
| 2 | Welding Quality | / | The radiator is allowed to be repaired by welding. After welding, the radiator fins should be straightened, and the area damaged by welding repair shall not be greater than 2% of the front area of the core. | Meet the requirements | Qualified |
| 3 | Painting Quality | / | The paint film should have a uniform appearance, with no exposure of the base, and slight flow marks are allowed. | Meet the requirements | Qualified |
| 4 | Appearance Quality | / | There should be no collision damage to the radiator; the area of the fallen radiator fins should not be greater than 2% of the front area of the core. | Meet the requirements | Qualified |
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