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Car tips: how to judge the quality of the radiator

Nov. 18, 2019

The high water temperature is a high-risk fault in summer, and the causes of high water temperature are various, and the diagnosis is not simple. Usually, the maintenance personnel will start with several parts that are prone to problems, such as water temperature sensors, thermostats, radiator fans, and so on. When these parts are removed, the maintenance personnel will suspect the radiator.

The role of the radiator is to dissipate heat from the coolant to ensure that the engine is operating at normal operating temperatures to avoid overheating. It is itself a very durable car accessory, so it will be checked in the back position.

So how do maintenance personnel judge whether the radiator is good or bad? The custom electronic radiator supplier will tell you a few tips.

1, visual inspection

The first thing to check is the appearance. Observe the radiator core for serious deformation and damage. The surface of the radiator core is seriously dirty. It should be known that the heat sink will cause poor heat dissipation and also cause high water temperature.

2, leak check

Check the radiator core and the upper and lower water pipe joints for leaks, and the coolant will leave obvious traces after evaporation. At the same time, check the clamps on the upper and lower water pipes of the radiator to ensure that they are stuck firmly enough. The looseness of the clamp is often the main cause of leakage here.

In addition, if the leak point is not observed by observation alone, it can be checked by a stress test, and a pressure tester is required. Stress testing can help us identify leaks that are difficult to detect, by pressurizing the heat sink to allow coolant to leak from the leak, or by holding a pressure test to check if the heat sink maintains pressure to confirm the presence of a leak.

Extrusion Aluminum Heat Sink

Extrusion Aluminum Heat Sink

3, cycle state check

Blockage inside the radiator core can cause coolant flow to be blocked and can cause the engine to overheat. Usually the blockage is caused by scale and radiator core corrosion.

For models with a custom heat sink cover, remove the radiator cover and start the engine warm-up. When the engine reaches the operating temperature, that is, after the thermostat is turned on, you will see the coolant begin to flow through the opening. If the coolant flow is not visible, there may be a radiator blockage, a thermostat failure, or a pump failure.

For models without a radiator cover, we can judge the coolant circulation by the temperature of the radiator pipe. When the engine reaches the normal working temperature, if the temperature difference between the upper and lower water pipes is large, the coolant circulation is poor, and the same may be the radiator blockage, the thermostat failure or the pump failure. In addition, we can use the infrared thermometer to test the temperature of the radiator core after the engine reaches the normal working temperature. If there is a large temperature difference locally, it may indicate that the radiator may be blocked.

Tips for you:

The aluminum extrusion heat sink is one of the most important components in the cooling system and consists of a radiator core and a coolant tank and all necessary connections and firmware. The radiator core is usually made of aluminum, and the coolant tank is made of aluminum or glass fiber reinforced polyamide. The fault of the radiator is mainly divided into blockage and leakage. The blockage will directly cause the problem of high engine water temperature, causing the engine to overheat; the leakage will cause the coolant to be insufficient, and in severe cases, the engine will overheat, and the overheating will cause serious damage to the engine.

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