I just bought a pair of Moog ball joint and need to know if their already greased or I need to grease them before use, I couldn't tell if their pre greased...thanks
Some greasable joints have little more than dust boots that the grease will always seep out around. Better ones, like usually OE and Moog are essentially sealed but have a grease relief area. Some are sealed and have a zerk fitting and the boot will just keep expanding and eventually blow out if overgreased but those type don't seem that common.