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What are the methods and skills to correctly purchase auto parts?
2021-11-02 16:07:28

See if the trademark logo is complete. The outer packaging of authentic products is of good quality, the handwriting on the packaging box is clear and the overprint color is bright. The packing box and bag shall be marked with product name, specification, model, quantity, registered trademark, factory name, address, telephone number, etc. some manufacturers also make their own marks on the accessories. Some important parts, such as generator, distributor and fuel injection pump, are also equipped with operation instructions, certificate and inspector seal to guide users to use and maintain correctly. When purchasing, we should recognize it carefully to prevent buying fake and shoddy products.

See if the geometric dimensions are deformed. Some parts are easy to deform due to improper manufacturing, transportation and storage. During inspection, the shaft parts can be rolled along the glass plate to see whether there is light leakage at the joint between the parts and the glass plate to judge whether it is bent; When purchasing clutch driven plate steel plate or friction plate, hold the steel plate and friction plate in front of your eyes to observe whether they are warped; When purchasing oil seal, the end face of oil seal with framework shall be round and can fit with flat glass without deflection; The outer edge of the frameless oil seal shall be upright, deformed by hand, and can be restored to the original state after releasing. When purchasing various gaskets, you should also pay attention to check the geometric dimensions and shapes.


Auto parts


Check whether the joint is flat. During the handling and storage of spare parts, burr, indentation, damage or crack will often occur at the joint due to vibration and collision, which will affect the use of parts. Pay attention to inspection when purchasing.

Check the surface of auto parts for corrosion. The surface of qualified spare parts has both a certain precision and a bright finish. The more important the spare parts are, the higher the precision is, and the more strict the anti rust and anti-corrosion of the packaging is. When purchasing, pay attention to inspection. If the parts are found to have rust spots, mildew spots, or the rubber parts are cracked and lose elasticity, or there are obvious turning tool lines on the journal surface, they shall be replaced.

Check whether the protective surface is intact. Most parts are coated at the factory. For example, piston pin and bearing bush are protected with paraffin; The surface of piston ring and cylinder liner shall be coated with antirust oil and wrapped with packaging paper; Valves, pistons, etc. are soaked in antirust oil and sealed with plastic bags. If the sealing sleeve is damaged, the packing paper is lost, and the antirust oil or paraffin is lost during purchase, it shall be returned and replaced.

Check whether the bonding parts are loose. For the accessories composed of two or more parts, the parts are assembled by press fitting, gluing or welding, and there is no looseness between them. For example, the oil pump plunger and adjusting arm are assembled by press fitting; The clutch driven wheel and steel plate are riveted, and the friction plate and steel plate are riveted or glued; The frame of paper filter element is glued with filter paper; The wire ends of electrical equipment are welded. If looseness is found during purchase, it shall be replaced.

Check whether the rotating parts are flexible. When purchasing oil pump and other rotating parts assembly, rotate the pump shaft by hand and feel flexible without jamming; When purchasing rolling bearings, support the bearing inner ring with one hand and rotate the outer ring with the other hand. The outer ring should rotate quickly and freely, and then stop gradually. If the rotating parts do not rotate properly, it means that the internal parts are rusted or deformed. Do not buy them.

Check the assembly components for missing parts. Formal assembly parts must be complete and intact to ensure smooth assembly and normal operation. If individual small parts on some assembly parts are omitted, the assembly parts will not work or even be scrapped.


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Auto Body Parts,Sheet Metal Body Parts,Auto Parts Manufacturer

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