Buy a used car with the easiest way to check the engine

In the simplest way, check the hardest place!

The engine is the heart of a car, and the heart is not good - the result is not that you spend money on him, just watching her feel bad.

Speaking here today, we will give you a talk about how to detect a used car when it is not used to detect the engine! Without a golden heart, you won't be relieved to take it out!

First, check the engine oil to determine the condition of the engine. Observe the oil dipstick to see where the oil is. There is also the color of the oil. We all know that the oil can change the working environment of the engine and can increase the engine life. How to see the oil?

1. The oil color turns brown, which is normal. If the color is dark (indicating that the owner is not maintaining the vehicle) it is acceptable if it is simple; if it contains milky white, it may indicate that the engine oil may be doped with coolant (this situation is more serious) must refuse to purchase. (It is not ruled out that some oil colors are so dark.)

2. It is also very important to check the location of the engine oil. When the engine is working normally, the engine oil will be continuously worn out. Generally, it must be kept between the tick marks. If it is too low, this car may burn engine oil. Tail gas for scientific judgment. If it is too high, it may be an abnormal supplement. It is necessary to judge the color of the engine oil. If we don't see color or exhaust, we can't see the situation. Then we directly open the oil cap and see what happens. (Oil oil is a test item that must be noted)

Second, we can also determine the condition of the engine through the colors of various oils. If the engine maintenance condition is not good, there may be gel-like sludge on the lid. If there is white emulsion, then the engine draught must be vigilant. Observe the color of the oil filling port. If the surface of aluminum is slightly yellow, then it is a normal color. If there is a reddish brown sludge, it indicates that the engine maintenance condition is not good. Checking the coolant also opens the lid of the tank and checks whether any foreign matter is floating on the liquid surface of the coolant. If there is oil floating, it may indicate that organic oil has penetrated into it. If rusted dust is found in the float, the inside of the radiator is Corrosion conditions are very serious and this has a great impact on the engine.

Third, the air filter detection is also essential, if there is a lot of dust inside the air filter, indicating that the filter is very dirty, it shows that vehicles are often used in harsh environments, and the strength is very large, most of this The overall condition of the vehicle is very worrying (generally you can think of how the owner of the car)

Fourth, we listen to the sound of the engine again. Everyone knows that the sound caused by the engine is due to wear. However, there are many cases of engine wear. In addition to normal wear, there are rust, dust or cold start dry friction. Wear will cause the fit clearance to be too large, so that during the engine running, there will be a metal impact sound, the greater the sound, indicating that the more serious wear.

Fifth, then

Check the startability of the engine, mainly to check whether the engine can smoothly fire, the normal engine should start within 3 times, otherwise it shows that the engine's startability is a problem, there are many problems affecting the engine startability.

Six, is the problem of idle speed, the normal engine idle speed should be very smooth, the engine vibration is very small, while the tachometer is also stable in a data will not have much change in magnitude (the idle speed of each car is not the same, As long as it is stable).

7. Wait for the normal operation of the engine for a period of time. After reaching the normal working temperature, step on the gas pedal (note the gear position to be in neutral). Observe whether the engine speed is increased quickly. After deep-throttle the engine, release it and observe whether the engine speed is back. Normal idle speed and stability, while the engine sound is still rhythm.

Eight, check the color of the exhaust can reflect a lot of problems with the car engine, take a white smoke, black smoke, blue smoke is not normal.

The above are some simple methods for determining engine performance.

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