Coilover knock

[Lucadou]

I've recently installed my ISC coilovers, but I've got a bad knock from the FR coilover with any small bump in the road. I've double checked all the bolts are tight and the coilover rings are tight, but still get knocking. Any ideas?

 

[Lucadou]

Sorted it out. Was the coilover centre bolt, which didn't come pre-tightened.