Buying a carInspection tool accessoriesEveryone knows that there are good and bad parts for the same type of car accessory, so how can we distinguish them? Today, let's popularize the knowledge of automotive inspection tools and accessories.

1. Check if the trademark is complete:

The packaging quality of genuine products is good, the packaging box itself is clear, and the overprint color is bright. The packaging box and bag should have the product name, specifications, model, quantity, registered trademark, factory name, address, and telephone number. Most manufacturers will print their own labels.

2. Check if the joint is flat:

During the handling and storage of automotive inspection tool accessories, burrs, indentations, damages, or cracks often occur at the joints due to vibration and collision. Pay attention to checking when purchasing.

3. Check if the protective surface is intact:

Most parts are coated with a protective layer at the factory. For example, piston pins and bearing bushings are protected with paraffin wax; Apply anti rust oil to the surface of the piston ring and cylinder liner and wrap them with packaging paper; Valves, pistons, etc. Soak in rust proof oil and wrap with the expected tape.

4. Check if the bonded parts are loose:

An accessory composed of two or more parts that are pressed, glued, or welded together without any looseness. For example, the plunger of the oil pump and the regulating arm are combined through compression; The driven wheel of the clutch is riveted to the steel plate, and the friction plate is riveted or glued to the steel plate; The paper filter frame and filter paper are bonded together; The terminals of electrical appliances are welded together. If any looseness is found during the purchase process, it should be replaced.

5. Check if the rotating components are flexible:

When purchasing a rotating component assembly such as an oil pump, rotating the pump shaft by hand should feel flexible and free of jamming; When purchasing rolling bearings, support the inner ring of the bearing with one hand and rotate the outer ring with the other hand. The outer ring should be able to rotate quickly and freely, and then gradually stop. If the rotating part does not rotate properly, it indicates that the internal parts are rusted or deformed, and should not be purchased.

6. Check if the assembly components are intact and undamaged:

Check if there are any parts in the component. Conventional assembly parts must be complete and intact to ensure smooth assembly and normal operation. If some small parts on certain assembly components are missing, the assembly components will not work or even be scrapped.