I did these on my Titan. the shop did not do them right either. I got specific instructions and pics from my Nissan forum site.
now scroll down about half way down and you see a parts separated in the pictures. washers and rubber isolators. I used this for my pictures to show the shop. they did it wrong 2 times for me. I could not get springs compressors to work. they bent the threaded rod cranking down! use a shop with these springs. But they failed to put in the metal washer in place. and rubber piece!!! idiots!