So i bought some used Megan coilover with 33 level damper control from a member on here. He said they only had 2-3k on them. After installing it a week later, the rear right shock mount starts makin a lose/ knocking noise. RE-tightened the mount nut and height adjustment too. But a couple days later the same thing happens. Has anyone else ran into this problem with these's megan coilovers?

 

Not sure if this is your first experience with taiwanese coils, but megan's have a bad rep on the 350z/g35 forums.

 

It's hard to indict the seller because the coils you bought have often been known to do that right out of the box. But they were cheap, right?