1. Select vehicle-vehicle condition check
Choose your favorite car and identify the real information when the car leaves the factory: the nameplate of the car will generally indicate the main parameters of the car when it leaves the factory, such as the engine block. The VIP steel seal number under the left windshield of the cab can also be used to verify the authenticity of the nameplate.
2. Watch the appearance of the whole car
Whether the gaps in the door are equal. In addition, when looking at the appearance, you should also pay attention to whether the glass is original or not, and there is a mark on the bottom of the glass, so as to avoid the result of your careful selection being an accident car. The first step in selecting used cars is to check whether the metal plates at the left and right front ends of the engine compartment and headlights are painted with gold marks. If there are wrinkles, it is usually an accident car. The same is true of the metal plates at the left and right rear ends of the suitcase. I think it can be handled seamlessly. It can't be seen without careful observation, but if the tire is injured in an accident, it can't be repaired as long as it is not replaced. Moreover, for the appearance inspection of used cars, the most important things are car paint and solder joints. These two things can tell whether the car has been overhauled, whether the air conditioner, wiring and automobile market have peculiar smell, and whether the water tank and oil tank are normal.
3. Look at the mileage of the vehicle
It's too easy to change the mileage now. Some unscrupulous car dealers often adjust the actual mileage of vehicles privately in order to make their cars sell at high prices. If you think the figures on the odometer are unreliable, you can use the engine overhaul as a reference to estimate the reserve mileage of used cars. The calculation method is: spare mileage = driving mileage (km)/ cylinder wear (mm)× limit wear (mm)- cylinder wear (mm), which will be more accurate than the mileage shown on the table.
4. Look at the car chassis and battery
Get down to see if there is oil stain under the ground and oil stain on the chassis. There is nothing to see about the new car battery, just look at whether the connector is corroded and whether the small window is green. Note that battery connectors are generally loose and must be tightened before driving away.
Step 5 check the color of the oil
Some cars have run for many kilometers, and the odometer is still more than ten kilometers, pretending to be 0 kilometers! When watching, turn off the engine after three minutes, pull out the dipstick and wipe it with a paper towel to eliminate the oil black.
6. Listen to the engine sound in the distance
This can only be done by feeling. The operation method is: hit two cars, you stand in the middle position, and the distance between the two cars is equal. If you feel a loud noise (obviously louder than other cars), you can turn around and listen again to avoid the illusion that your ears are different.
7. Listen carefully to the engine.
It's better to be careful when choosing such a fine and expensive car. The more serious you are, the less likely the Zhuang family is to be careless with you. I've seen car owners with stethoscopes! He put a towel on the stethoscope head and pressed it around the engine, listening for more than ten minutes! Please explain it in detail here, so that you can hear whether the engine has abnormal noise, such as ringing, knocking on the cylinder, valve ticking and so on. A good engine has only one' grunt' sound and no other noise. However, this method depends on the accumulation of experience consciously at ordinary times, and it is not clear to say one or two sentences. Anyway, just listen to the car more. When someone can help, let him step on the accelerator, increase the engine speed, and then listen to the sound. Then let him block the exhaust port with a rag. If the engine is obviously loud and stops in a few seconds, it is a good car! Otherwise, there is air leakage somewhere.
Check workmanship
It depends on the connection of each line, whether it is shaking, etc. You'll see for yourself, so don't say much.
9. Test drive in the cockpit
As soon as I saw it, I couldn't wait to get into the cockpit to pick a car, so I knew I was a novice! I am most afraid of those who walk around the machine for a long time and don't get into the cockpit. There is nothing to say here. Check whether all kinds of buttons and switches are effective according to the instructions. Adjustment of lighting, acoustics, air conditioning, seats, safety belts, electric windows, etc. It should be tested one by one. Don't listen to dealers, they always tell you: "Don't worry, they are all new cars! No problem! " Everyone must check it carefully. The console panel is an easy place to go wrong. What should be emphasized here is the choice of clutch and brake. The test run is mainly to check the engine function, automatic start and acceleration process. Start the engine, running at low, medium and high speed without abnormal sound, and the sound is strong but not low; The gas discharged from the exhaust pipe is colorless or grayish white; The vehicle starts smoothly, and the clutch does not slip or shake; The speed change is light, there is no difficulty in shifting gears, and the vehicle does not shake its head at high speed; There is no vibration and noise in the drive shaft and drive axle. After long-distance test run, the engine water temperature, transmission and drive axle oil temperature are normal, the braking is sensitive, the water tank has no tank and no oil leakage, and the air conditioning, CD system and protection settings are normal. ABS and the whole braking system are sensitive and active.