How to make a simple valve core wrench: You can find a d+3.2 cotter pin, cut the head with a vise, and then cut a 2 mm gap in the middle of one end to make a simple valve core wrench. In addition, if there is no suitable tool to make iron products, the refill of ordinary ballpoint pen can be used as a substitute, and it can also be used instead of a spool wrench as long as a small opening is inserted into the spool at the end of the refill.

Tire is one of the essential parts in automobile. When the tire pressure is unstable and needs air supply, use the valve core wrench to open the valve core for air supply. However, in real life, we may encounter improper use of the spool wrench. At this time, we can find an alternative tool to use. In fact, in addition to using the valve core wrench, we can also use the valve screwdriver or valve cover to remove the valve core.

Just insert the screwdriver into the air nozzle and rotate it counterclockwise to remove the valve core. In addition, the valve core is located in the valve body to prevent the inner tube from leaking, and to check and adjust the air pressure. The inner hole of the valve is sealed by the cover arranged outside. Therefore, the valve cover can be used not only to prevent the internal hole of the main body from blocking and leaking, but also to disassemble the valve core.