Lower ball joints

Hello,

Those sealed ball joints are not designed to have any grease insert installed.
As they are sealed with the needed grease already inside.
They do not need to be serviced as they are maintenance free.

Please let me know if you have any questions.
Thank you.

https://www.2carpros.com/articles/how-to-release-a-ball-joint

Also, there was a recall on these a long time ago. We had to remove the wheels, then attach a fixture with an O-ring to seal against the welded seam around the bottom. Compressed air got blown into the fixture. If the boot ballooned up, there was a leak or gap in the weld that would allow water to get in. The joint was to be replaced in that case. As their suspension and alignment specialist, I did this on a real lot of cars, but only found a couple that had to be replaced.

There's a nylon insert under the ball to cushion it and to take up the slop. Any type of grease that is introduced will melt that insert resulting in a clunk over bumps and the need to replace the joint again. Nylon acts as a lubricant.