1. Check whether the trademark logo is complete. The outer packaging of authentic products is of good quality, with clear handwriting on the packaging box and bright overprinting colors. The packaging box and bag should be marked with the product name, specification model, quantity, registered trademark, factory name, address and telephone number, etc. Some manufacturers also print their own logos on the accessories. Some important parts such as generators, distributors, fuel injection pumps, etc. are also equipped with instructions, certificates and inspector seals to guide users to use and maintain them correctly. Be careful when purchasing to prevent buying counterfeit and inferior products.
3. Check whether the joint is flat. During the transfer and storage of spare parts, burrs, indentations, breakages or cracks often occur at the joint due to vibration and collision, which affects the use of Changan Car parts. Pay attention to inspection when purchasing.
4. Check whether the surface of Changan Car parts is rusted. The surface of qualified spare parts has both a certain degree of precision and a bright finish. The more important the spare parts, the higher the precision, and the stricter the packaging anti-rust and anti-corrosion. When purchasing, you should pay attention to check. If you find that the Changan Car parts have rust spots, mildew spots, or the rubber parts are cracked, lose elasticity, or the journal surface has obvious lathe texture, they should be replaced.
5. Check whether the protective surface is intact. Most Changan Car parts are coated with a protective layer when they leave the factory. For example, the piston pin and bearing are protected with white wax; the piston ring and cylinder liner are coated with anti-rust oil and wrapped with packaging paper; the valve, piston, etc. are soaked in anti-rust oil and packaged in plastic bags. If you find that the sealing sleeve is damaged, the packaging paper is lost, the anti-rust oil or white wax is lost when purchasing, it should be returned.
6. Check whether the glued Changan Car parts are loose. Accessories composed of two or more Petrol Car parts are pressed, glued or welded between Petrol Car parts, and no looseness is allowed between them, such as the oil pump plunger and the adjustment arm are pressed together; the clutch driven wheel and the steel sheet are riveted together, the friction sheet and the steel sheet are riveted or glued together; the paper filter element frame and the filter paper are glued together; the wire ends of electrical equipment are welded. If looseness is found during purchase, it should be replaced.
7. Check whether the rolling parts are flexible. When purchasing rolling parts such as oil pumps, turn the pump shaft by hand, and it should feel flexible and without sticking; when purchasing rolling bearings, support the inner ring of the bearing with one hand and turn the outer ring with the other hand. The outer ring should be able to rotate quickly and freely, and then gradually stop. If the rolling parts do not rotate properly, it means that the inside is rusted or deformed, so do not buy it.
8. Check whether there are any missing parts in the assembly. Regular assembly parts must be completely intact to ensure smooth installation and normal operation. If some small Changan Car parts on some assembly parts are missing, the assembly parts will not work or even be scrapped.