Satisfied answer
1, the hood is the place with the most secrets. When opening the hood, first carefully check whether the inside of the hood has been painted. If there are traces of paint, the cover plate has been hit. Then look at the I-beam above the engine water tank and the two longitudinal beams or two internal auxiliary beams below the engine body. Under normal circumstances, there should be traces of circular spot welding in these places. If the spot welding shapes are different, the car may be hit. In addition, whether the waterproof rubber strip is smooth is also the basis for judging whether the vehicle is injured. 2. Check the water tank. Open the cover of the water tank and check whether there are any impurities floating on the surface of the cooling water. If there is oil slick, it may be that the oil has penetrated into the cooling water. If there is rust powder, it means that the corrosion in the water tank is very serious. All these show that the engine condition of the car is not very good, so we should reconsider buying or not, and bargain appropriately. 3. Check whether there is oil pollution and oil leakage in the engine compartment and below. If there is oil pollution, it may be that the central part of the engine, such as the cylinder gasket, leaks oil. Oil leakage will bring a lot of trouble to future maintenance, and resolutely bargain. 4. Feel the performance of the engine. After the engine starts, when stepping on the accelerator, I feel very slow. There may be something wrong with the fuel or the starting system. There is also the need to carefully distinguish the sound of the engine. The general principle of inspection is that the engine sound should not be chaotic. You should pay special attention to whether you hear a small and short crash or a low "rumbling" sound. You must never buy such an old car. There is a "secret" in choosing used car tires. Most consumers will look at the engine, appearance and interior when choosing a used car. In fact, you can also see the advantages and disadvantages of a car from the tires of used cars. First, when buying a used car, first walk around the car and check whether the four tires are "flat". If there is a situation of "losing gas", it can be explained that the car has been in stock for a long time and should be cautious when buying. Second, observe whether the tire brands are consistent. Generally speaking, there is no need to replace new tires when a private car runs normally within 40 thousand kilometers. If the odometer of the used car you want to buy is less than 40,000 kilometers and the tire brand is not uniform, the authenticity of the mileage may be greatly reduced. Third, check the front wheel. If the left and right wheel patterns are unevenly worn, it may be caused by incorrect toe-in or camber, excessive steering gear clearance or loose steering mechanism connection. Such vehicles should be carefully maintained. Fourth, check the used car hub bearing. If you can, you can lift the frame or open a ditch. After that, turn the wheel by hand. If it is smooth and noiseless, the quality will be better, otherwise there will be security risks.