Just after fitting coilovers, myself, forgot the notched nut also that sits inside the rubber top mount. Looks like your mounts are shagged also, why dont you fit new ones while your at it. G60 items are good. I will get a pick of my set up tomorrow night for you.
You should have the parts assembled from top down as follows.
-nut (under bonnet)
-top cap (under bonnet)
- notched nut (under valance)
- top rubber mount with bearing.
- small washer (sits on the shoulder to thead of the damper)
- Coilover top cap for spring.
Me thinks this is correct anyway!
I found the easiest way to fit these, was to screw down the coilover all the way down and off the thead until they are loose.
Fit all the items at the top.
Then screw back up the spring nut by hand, its alot easier to do off then on.
Measure both with a rule so they are even.
What breed of coilovers are you fitting?