Before buying a used car, we must first test the performance of the used car and evaluate the used car, which is the premise to ensure the safe driving of the car in the future. But for people who buy cars for the first time, how should they detect used cars? The old driver will show you a quality used car!
To touch the exhaust pipe Port
If the engine is old, it is not easy to burn oil, and the exhaust pipe mouth will be oily. The old Miguo cars sometimes leak coolant, and the exhaust pipe mouth is wet, with green coolant. Don't buy such a car. The normal exhaust pipe port is dry when the car is cold, slightly black toner. When the engine turns, there is no black smoke or blue smoke when stepping on the accelerator.
Touch inside the car
Hit the fire, is it dry and neat to start? Also, it is best to try it when it is cold. Some old cars are difficult to start cold cars. Turn equitemperature for a while and listen to whether the sound of the engine is even and stable. Look at the tachometer, do not exceed 800 revolutions. The well-maintained car is still stable even though it is old, without knocking or limping. The high idle speed is often due to unrepaired faults in ignition, fuel injection and other systems, which are unstable at low speed and will destroy the car. It depends on whether warning light is on the dashboard. Sometimes a fault lights warning light for N years, and the light bulb burns. At this time, we need to see if all warning light are on when the key is screwed to the first gear, and they are all off after the fire.
Touch gearbox
After the engine is hot and stable, step on the brake and hang the gear to R gear. The normal car has a slight backward meal within two or three seconds, indicating that the reverse gear oil pressure is normal. Then change the gear to N, stop for a while and hang it to D. When the car is normal, it will gently move forward within two or three seconds to indicate that the positive gear oil pressure is normal. Regardless of the forward and reverse gear, it takes more than five seconds to stop, indicating that the gearbox is seriously worn and may be hit in your hand. Handcar gearbox is generally not broken, but the clutch is worn and expensive. The way to touch it is to step on the brake handle clutch to the end, hang it up and loosen the clutch slowly. A good clutch will be combined once it is relaxed, the engine will change, and the car will rush forward. The worn ones need to be delivered to more than half of them before they can be combined.
Touch walking condition
Is the acceleration fast (is the engine powerful)? Automatic car is the shift smooth? Is the brake sensitive and soft? Is the engine noisy? Is the turn sensitive? Loosen the steering wheel slightly, does the car shift in one direction? At low speed, is there any Kalakala sound (if there is Vientiane knot wear) when turning to the maximum? Does it feel good to drive? Is there a big blind spot on the side behind the car? Is it comfortable to sit? No matter how good the car feels, it won't work either.
Touch Body
This step is very important to infer whether the car has had a major accident of hurting muscles and bones. Or pickled in the flood. Accident cars often have sheet metal and paint marks, and fastening screws is not the original one. You need to switch the doors one by one to see if there is any rust or lax locking. More abnormal comrades often use small magnets (it is recommended to use cloth to cover the scratch-free body!) Draw a circle along the car body, and the eyes can't see the place where it is flat with packing, but the magnet suction is weak, just like my Golden Eye, through (that) thousands of layers powdery fragrance look (Ah, look) there are thousands of wrinkles.
Touch the front cover inside
First pull out oil dipstick and have a look. The oil quality of the well-maintained car is clear and clear, and there is no paste. Some cars will add very viscous additives to the engine oil. At this time, the oil is very sticky, indicating that the car burns the engine oil and needs additives to maintain it. This car is not available. If there is any doubt that you need to change the oil for maintenance of the car. After reading the oil check transmission fluid, it is red transparent liquid normally, and there is no paste smell. Transmission fluid deterioration also indicates that there is something wrong with the gearbox. Third check brake fluid, power steering fluid and coolant. Lack of liquid indicates leakage. Further check. Fourth, see if the timing belt has been changed. Generally, the car needs to be changed when it reaches 70,000. If you don't change it, there will be no problem, but the belt will suddenly break at high speed after aging, and suddenly lose power. Turning, the brake becomes extremely heavy and prone to accidents. When the timing belt of some cars breaks, the whole engine will be destroyed by passing. After changing the belt, the general machine union will mark paint spots on the timing belt shell. If there is no mark, ask the owner. If the old car has not been changed, ask for a lower half of the cost of changing the belt (it costs 700 yuan to change the belt, but it is 400 yuan if it is not changed). The battery has a date on it. If it is too old, it costs money for a lot of corrosion on it.
Touch the bottom of the car
If you can't bend your waist, you can take a picture in a mirror. It mainly depends on whether there are serious impact scratches, whether there is oil leakage in the engine gearbox, and whether the rubber boot on the front axle is intact (if the oil inside the Boot is broken, it will be thrown to the bracket next to it). We also need to see if there are any loopholes in the exhaust pipe and silencer. More importantly, there is a catalytic converter in the middle of the exhaust pipe, and there is a honeycomb-shaped white gold plated porcelain inside. If it is flat, it will not be able to pass the exhaust gas detection, and the exchange is expensive.
Touch walking part
Is the tire too old? Is the brake film too thin? The four wheels with great strength pull hard, loose is the bearing wear. Press hard on each wheel of the car body. Normally, it should be up and down for one and a half times. After the shock absorber is worn, it will oscillate up and down, and it will rattle. Shock Absorber, front bearing problem can also feel when trying to open, then confirm again. Check all the lights and write down the broken bulbs. The eighth touch is also perfect, with a small account book, one by one to calculate how much money to repair. Whether the psychology can bear it.
