First, check out whether there is complete sigh of the registered trademarks.
Certified products are characterized of sound package, distinct writing and colorful chromatography. There are products names, specification models, quantities, registered trademarks, factory names, factory address and phone numbers, etc on the packing boxes or bags. Some manufacturers will type their signs on the auto body parts. Some important parts such as generators, distributor blocks and fuel injection pumps are provided operating instruction manual, certificate of soundness and surveyor signet, in order to guide users for correct using and maintenance. Attention should be paid when choosing auto body parts to prevent buying counterfeit and shoddy products.
Second, check out whether the physical dimension of auto parts has transformed.
Some auto body parts are easy to be out of shape due to improper manufacture, transportation and storage. During examination, roll shafts along the glass pane to check if the joint place between auto parts and glass pane leaks light. If so, the body parts are crooked. When choosing driven plate steel disc or friction plate of clutch, put the steel disc or friction plate right before eyes to check if they are warping. As to the oil seal, the one with framework is round and can be joint to plate glass without bend. However the one without framework has a regular outer edge. Make it out of shape by grasping, and after letting go, it will get back into shape. When choosing pads, pay attention to physical dimension and shape.
Third, check whether the joint place is smooth.
There are often burrs, indentation, breakage or flaws appearing on the car body kit joints due to vibration or collision during carrying and storage, which affects usage of body kits.
Forth, check whether there is corrosion on the car body kits surface.
Surface of qualified auto body kits are precise and smooth. More important the body parts are, more precise they are and more anti-corrosive and antiseptic packing they have. If there are corrosive spots, mildew spots on the body parts, the rubber articles chap or lose elasticity, or there are apparent turning tool lines on the journal surface, those auto body parts should be exchanged.
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