Nowadays, the quality of gasoline is good and bad. After gasoline vehicles have been used for a period of time, it is inevitable that there are various impurities in the fuel tank, which makes the filter in the fuel supply system gradually unable to bear. More and more precipitated impurities in the fuel tank will inevitably enter the engine with the fuel supply system in the vehicle. Over a long period of time, it will cause damage to the vehicle. Now let's see how to clean the oil tank!

1、为什么要清洗油箱？

1. Why clean the tank?

虽然油箱除了在加油的时候处于半封闭状态，其他时候都是全封闭的。但是随着车子的年龄增加，使用时间变长，油箱内的沉淀杂质会越来越多。本身油内也是会有杂质，各加油站油库底部长时间也会积累不少杂质。这些杂质在进到油箱之后，先沉淀到油箱底部。慢慢所沉淀物太多之时，也会随燃油进到汽车发动机之内，对汽车发动机会导致非常严重磨损。

Although the fuel tank is in a semi closed state except when refueling, it is totally closed at other times. However, with the increase of the age of the car and the use time, more and more impurities will precipitate in the fuel tank. There will also be impurities in the oil itself, and a lot of impurities will accumulate at the bottom of oil depots of gas stations for a long time. After entering the tank, these impurities precipitate to the bottom of the tank. Slowly, when the sediment is too much, it will also enter the car engine with the fuel, which will cause very serious wear to the car engine.

2、什么时候该清洗？

2. When should it be cleaned?

油箱本身也是有采取保护措施，可防水还保温。假如长久怠速行驶，或许在3万之时，你就要对汽车进行油路清洗。又或更换滤清。否则一经碰到油路被堵塞，油箱气压太高。汽车所行驶过程当中，也会有甩动状况。高压之下，油箱易开裂，比较严重之时也会有漏油状况，油耗也会变得非常高！

The oil tank itself is also protected from water and heat. If you drive at idle speed for a long time, you may have to clean the oil circuit of your car at 30000 km. Or change the filter. Otherwise, once the oil circuit is blocked, the air pressure in the oil tank will be too high. During the driving process, the car will also swing. Under high pressure, the oil tank is easy to crack. When it is more serious, there will be oil leakage, and the fuel consumption will become very high!

3、如何清洗？

3. How to clean?

油箱清洗分为两步，内部和外部。

Tank cleaning is divided into two steps, internal and external.

外部：清洁检查油箱外部，检查油箱、油管、接头有无凹瘪和渗漏，并拧紧油箱支架固定螺栓。如果发现有凹瘪和渗漏现象，应拆下损坏部件进行修理。

Exterior: clean and check the exterior of the oil tank, check the oil tank, oil pipe and joint for concave and leakage, and tighten the fixing bolts of the oil tank bracket. If concave and leakage are found, the damaged parts should be removed for repair.

内部：打开燃油箱口，取出滤网筒，吸出燃油箱内部分燃油，箱内留有约30L左右的燃油。

Inside: open the fuel tank port, take out the filter cartridge, suck out part of the fuel in the fuel tank, and there is about 30L fuel left in the tank.

将清洗干净的压缩空气管(更好是塑料管)从加油管口插入油箱底部，用气压吹动燃油箱底部的燃油，使之翻腾而进行清洗。清洗时，可用干净的布块稍微堵住插入油管的加油管口，并不断变换气管下端的位置和方向。

Insert the cleaned compressed air pipe (preferably plastic pipe) into the bottom of the fuel tank from the filling pipe orifice, and blow the fuel at the bottom of the fuel tank with air pressure to make it churn and clean. When cleaning, a clean cloth can be used to slightly block the oil filling pipe orifice inserted into the oil pipe, and the position and direction of the lower end of the gas pipe can be changed continuously.

吹洗20分钟后，立即放出油箱内的燃油，使悬浮在油中的杂质随燃油一起流出。如果流出的燃油较脏，应以上述的方法再清洗一遍油箱。

After 20 minutes of purging, drain the fuel in the tank immediately, so that the impurities suspended in the oil flow out with the fuel. If the outflow fuel is dirty, clean the fuel tank again in the above way.

装复并拧紧放油螺塞。将加油管口的滤网筒清洗干净，装入加油口管内。向油箱内加入清洁的燃油，盖好油箱盖，并将油箱外部擦拭干净。要注意，从油箱内放出的燃油应经过72小时的沉淀后，才能使用。

Replace and tighten the drain plug. Clean the filter cartridge of the oil filling pipe and put it into the oil filling pipe. Add clean fuel into the tank, cover the tank cap, and wipe the outside of the tank clean. Finally, it should be noted that the fuel discharged from the fuel tank can only be used after 72 hours of precipitation.