I was wondering if anyone has had issues with the upper a arm grease fitting not wanting to flow good..natuy I thought it was just clogged so I cleaned it out same thing,so I replaced it with a fresh one..same thing didn't wanna flow good or at all..so I removed the bolt and shot grease into the fitting and it worked fine...put the bolt back in and same thing again didn't wanna flow good or at all..any suggestions on this matter??