With the following details, you can check whether the chassis cover has been replaced:

1. Whether the hinge screws of the chassis cover are tightened;

2. The paint surface is repainted, and the thickness of the paint film is not within a reasonable value (paint surface test data), which proves that there is a sheet metal;

3. There are traces of re-daubing on the top glue of the machine cover, which proves that there have been metal sheets;

4. The accessories attached to the machine cover have traces of disassembly (locks, soundproof cotton);

5. There are repainting marks on the paint surface inside the machine cover;

6. Whether there are traces of burnt or metal sheets on the cover interlayer.

If 1 and 5/appear at the same time, it is very likely that the cover will be replaced.

The machine cover belongs to the body panel, and it can not be directly proved that the vehicle has had a major accident by replacing it alone or repairing it with sheet metal. It is necessary to record the judgment results, and then give the car condition judgment by combining the detection results of other parts.

Detection method of water tank frame:

1. Observe whether the fixing screws of the water tank frame are twisted;

2. Check whether the water tank frame has any traces of repainting (iron frame);

3. Check whether the new and old water tank frame is consistent with the existing state of the vehicle;

4. Check the connecting bolts of accessories (locks, water tanks, etc.). The water tank rack on the) is twisted;

5. Check whether the water tank frame is deformed and not repaired;

6. Check whether the production date of the accessories is later than the vehicle factory date.

7. Check whether the fixed solder joint of the water tank frame is the original solder joint.

The water tank frame belongs to the front, which may be damaged by collision or bottoming. Some normal maintenance projects will also move the screws of the frame.

If it's a plastic water tank frame, it can't be repaired by stumbling, and the replacement cost is not high, so the traces left are particularly blurred. It is necessary to carefully record the condition of the car, and then make a comprehensive judgment based on the test results of other parts.

Detection method of front fender, namely fender:

1. Whether the fixing screws of the fender are twisted;

2. Whether there are repainting marks on the paint surface of the leaves (the data is within a reasonable range) Data source paint surface detection;

3. Whether there are heavy paint marks on the fender paint surface (the data is within an unreasonable range) and sheet metal repair;

4. Whether there are repainting marks on the paint surface of the inner side of the fender (the joint between the fender and the door, and the inner side of the fender);

5. Whether the fender frame is deformed;

6. Whether the blade holder is cut and welded;

7. Open the door, check whether the sound insulation cotton inside the fender is intact and normal from the gap between the A-pillar and the door, and pay attention to whether there is any problem of sheet metal and paint flowing on the edge of the fender;

8. Observe whether the clearance between the fender and all the surrounding parts is even and compare left and right;

Fender itself belongs to the scope of body panel, and it is not enough to explain that the vehicle is an accident vehicle by replacing it alone or repairing it with sheet metal. Record the test results, and then make a comprehensive judgment according to the test results of other parts. However, there are traces of cutting and welding on the fender frame, indicating that there was a serious accident here. Theoretically, the body skeleton has been injured, so you must be more careful.