What details should I pay attention to when buying a used car?
Because of the cold weather in winter, buying used cars is different from other seasons. When buying a second-hand car in winter, in addition to the routine condition inspection, the engine, braking system, tires and batteries are all key parts of the winter car. When inspecting the vehicle, the owner should focus on the following automobile parts:
Battery: You need enough electricity to start the car in winter. Because the cold weather will reduce the performance of the battery, it is necessary for the owner to check the power, the cleanliness and tightness of the wiring, and whether there is leakage and corrosion of electrolyte. If you need to accurately test the performance of the battery, you need to use professional equipment. The common situation is that it is difficult to start after a long stop, and it is difficult to start after a stop. The cost of battery replacement is around 500 yuan.
Engine: Cold weather will aggravate the existing hidden dangers of the engine, such as poor acceleration performance, difficult starting and low fuel economy, which are difficult to find in normal temperature weather. Apart from the battery, the most likely cause of starting difficulty is excessive carbon deposition in the valve. The failure of thermostat will lead to the engine failing to reach the recorded working temperature for a long time, resulting in poor fuel economy. The above two places cost about 1000 yuan.
Demister: Demister ensures your vision is clear. Some used cars have damaged the fogger at the rear windshield due to film pasting, car washing and other reasons, and can't get rid of the frost and fog, which brings hidden dangers to driving safety. Demister and windshield are integrated and cannot be maintained separately. The replacement cost varies from several hundred yuan to several thousand yuan according to different models.
Tires: Once tires are worn, they can't provide enough friction, which will affect driving safety. This problem is very dangerous in any season, especially in winter. When checking tires, you should also pay attention to tire pressure and tire tread. Check whether the tire is cracked, unbalanced or severely worn. Please note that a tire with a tread depth of less than 4 mm does not meet the safety standards for driving, and it will not provide enough friction. It should be replaced immediately. The cost of four tires is basically more than 2000 yuan (excluding mini-cars).
Brake system: Pay special attention to check the brake function, which can't be ignored at any time. In winter, due to the climate and weather, it is especially necessary to ensure that the brakes are sensitive, the brake oil is sufficient, the brake shoes are in good condition, and the ABS works normally.
Belt: usually don't wait for the belt to make a terrible scream to think of inspection. When the engine is cold, check whether the belt is damaged, incomplete, cracked or glowing due to surface wear. If this is the case, it should be replaced. In winter, the electricity consumption is large, so the motor belt should be checked and replaced early. The cost is around 200 yuan.
Antifreeze: To buy a used car in autumn and winter, you should first check the use of the water tank and antifreeze. Firstly, observe whether there is leakage on the surface of water tank and waterway pipeline; Then, open the water tank cover and observe the liquid in the water tank. If oil stains float on the liquid surface, it means that the engine cylinder is leaking oil. Over time, these oil stains will block the waterway in the cylinder, resulting in poor waterway circulation. At the same time, it is necessary to distinguish whether the liquid in the water tank is antifreeze. If it is ordinary water, it will freeze in cold winter because the freezing point is higher than antifreeze, which will not only make the waterway unable to circulate normally, but also cause serious damage to the engine. Finally, unscrew the filler cap and observe its back. If emulsion is attached, it means that the cylinder block leaks oil, and the antifreeze will penetrate into the engine oil along the damaged part of the cylinder block to form emulsion, thus causing engine damage.