One, look at the exterior of the vehicle. Whether there are obvious scratches and dents on the exterior of the vehicle, especially the position of the front pump handle (front bumper). In the event of a collision, the car should be painted on the outside in time. In this regard, car owners should not be careless, because the role of paint is not only beautiful, but its more important function is rust prevention. The cracks in the paint layer caused by some collisions are not very large, so the car owner thinks that it does not affect the appearance of the vehicle and turns a blind eye to it, but in fact, the metal under the paint has begun to rust. When the car owner can observe from the outside, the internal metal layer has been Rust is bad.
2. Visually inspect the surface of the brake disc through the aluminum alloy steel rim of the tire. The surface of the brake disc is originally smooth. If there are obvious grooves, it may be that when the vehicle is driving on the gravel road, some fine gravel is stuck between the brake disc and the fender, constantly rubbing the surface of the brake disc, so the grooves appear. . When this happens, the vehicle may make a rattling, rattling sound as it moves, and in some cases the owner will hear a squealing noise when dragging the brakes.
Third, tires. Check whether the tire has obvious trauma, scratches and whether the tire pressure is up to standard.
Fourth, check whether there are sundries in the air inlet or air inlet grille, electronic cooling fan, etc. For example, whether there are sundries such as leaves, plastic bags and insect corpses entangled, and whether the water tank and air conditioner condenser are covered with dust. If conditions permit, the dust can be blown away with compressed air. When the engine is cool, then flush the above parts with a water gun from the inside to the outside.
V. Owners who are more familiar with the vehicle can open the engine cover for inspection. Contents include oil, steering oil, brake fluid, and coolant level; start the engine and listen for any noticeable noise.
Six, check the carpet. According to the experience of the technician using the car, if the vehicle has passed some poor roads (such as wading) or encountered heavy rain, flooding, etc., the owner should check whether the vehicle carpet is wet. Some holes in the car body of some brands are plugged with rubber plugs. After a long time, due to the deterioration of the sealing performance of the rubber plugs, water will enter the car in the case of flooding, wading, etc. The situation is not serious. , but it may cause mildew and odor in the car.
In addition, some high-end cars’ automatic gearbox oil, differential oil, etc. should also be taken care of. Although these oils are free to be replaced for life, the upper ends of these components generally have air holes. When water is immersed or waded, water enters the gearbox or differential through the air holes. This kind of failure does not immediately cause vehicle failure, but it can lead to serious losses over a long period of time. If the car owner has indeed waded in deeper water (such as the water surface submerging the lower edge of the door), it is recommended that the car owner go to a professional manufacturer for inspection.