1. Look at the packaging

Regular manufacturers of accessories packaging are generally more standardized, unified standard specifications, clear and formal print, should be marked with product name, specification model, quantity, registered trademark, factory name, factory address and telephone number, and some manufacturers also make their own markings on accessories.

2. Look at the appearance

The surface of qualified spare parts, printing or casting and marking are clear and regular, with certain precision and bright finish. The more important the spare parts are, the higher the accuracy, the stricter the anti-rust and anti-corrosion of packaging. If rust spots or cracks of rubber parts, loss of elasticity, or obvious lathe knife lines on the surface of the journal are found, they should be replaced.

3. Look at the paint.

Some illegal businessmen will simply process the waste parts, such as dismantling, assembling, assembling, painting, etc., and then sell them as "qualified products". After removing the surface paint, they can find the old paint.

4. Look at the craft

The appearance of inferior products is sometimes good, but due to poor manufacturing technology, cracks, sand holes, slag inclusion, burrs or bruises are easy to occur. If the cylinder gasket is extruded and deformed, it is easy to cause improper sealing and ablation, leading to oil leakage, air leakage, and water leakage.

5. Look at "loosening"

Parts consisting of two or more auto parts are formed by pressing, gluing or welding. No loosening is allowed.

6. Look at the assembly marks.

In order to ensure that the assembly relationship of the parts meets the technical requirements, some regular parts are marked with assembly marks, such as timing gear marks, piston top marks, etc. to ensure the correct installation of the parts. If there is no mark or the mark is blurred, it can not be recognized, which will bring great difficulties to assembly, or even the wrong assembly.

7. Look at the omissions

Regular assembly parts must be complete and intact in order to ensure smooth loading and normal operation. Leakage of small parts on some assemblies may be "waterborne goods", which can easily cause difficulties in loading. It may even cause the whole assembly parts to be scrapped due to the shortage of individual small parts.

8. Look at the protective layer

In order to facilitate storage and prevent parts from bumping, there are protective layers before parts leave the factory. For example, the piston pins and bearing bushes are protected by paraffin; the surface of piston rings and cylinder liners are coated with anti-rust oil and wrapped with wrapping paper, and the valves and pistons are sealed with plastic bags after being immersed in anti-rust oil. If the seal sleeve is damaged, the packing paper is lost, and the rust-proof oil or paraffin is lost, it should be replaced.

9. Look at the documents

Some important components, especially assemblies, such as carburetors, distributors, generators, etc., are usually manufactured with instructions and certificates to guide users in installation, use, and maintenance.

10. Look at specifications

Most automotive parts have specified models and technical parameters. When purchasing electrical equipment, attention should be paid to check whether the voltage and power of the replaced parts are the same.

Above is a tip about automobiles, how to choose auto parts, I hope to help you.

Joytutus is an online store providing professional accessories for all kinds of cars. It is famous for its high quality and high-cost performance and is committed to providing customers with professional and practical auto parts.

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