We are ball joint separator manufacturer and we will provide some knowledge about ball joint separator.
The first signs of a failing ball joint include loud banging over bumps and/or sloppy steering as the joint separates out of its socket. A typical safety inspection should measure the amount of motion in your ball joint, and only allow a safe amount to pass. You can test ball joint play yourself on McPherson spring struts that do not put any load on the ball joint by lifting the car and manhandling the wheel. This design is rare, however, because most suspension springs apply constant pressure on the assembly.
If your car has a spring that puts load on either the upper or lower ball joint, you will need to remove that spring pressure by positioning your jack under the control arm and jacking it a few inches up to relieve the spring pressure on the ball joint. If the design allows, you can use a special ball joint support tool like the one made for the Saab 900 to hold everything in place. You can also relive tension with standard spring compressors, which is a common way of doing this.
If you find ball joint separator supplier in China, you can send your email to info@autotoolsdepot.com.