I have just installed some used coilovers on the z. I am now getting an horrendous clunking/knocking noise over bumps they also creak if I lean on the back of the car...

 

Are they shot? What should or could I do?

 

Thanks

Could be, the tops are on proper arnt they? Not loose etc, did you torque them once the car was back on the floor.

Yes torqued them up, should there be rubber in between there somewhere?

Varies, sometimes an o ring sometimes a paper gasket, depends on the manufacturer. Check for play however that's what alerted me to one of my bilstiens being duff, a clunk over bumps like something was rolling about loose in the boot.

If I touch the thread coming through the top mount and push down on the car I can feel the vibration through the coilover.

The central damper one, or the two mounting ones?

The central one...

You need to check it's tight. You shouldn't have any play on that centre one, it could be as simple as the bush it sits in it's dead, or it's loose.

Cheers, is it ok to pinch this up whilst installed on the car?