please elaborate on the installation method / issues
Honestly, they still carry the same issues as poly bushes. The material is harder, and the metal inserts have groves to retain grease, both of which extend the life of the bush, but without regularly regreasing they will still tends towards the issues seen with poly bushes.
/sweeping generalisation alert!/
never yet come across a car with [color=rgb(40,40,40);font-family:helvetica, arial, sans-serif;]Ertacetal/nylon/etc bushes fitted right..[/color]
usual issues are that no care has been taken to make sure that the bush'es themselves are a snug fit in the wishbones, usually the wishbone has some weld that sticks up and prevents the bush fitting home 100% and square or the like, then the tube is pushed in, and the bolt just clamps the whole lot together so tight that it all binds up.
sometimes the tube of the wishbone is a tad long/short so the bush tube is then too short/long.
basically, you have to 'fettle' the bushes to get them 100% right, and nobody seems to do this (especially when they are charging a fixed cost to do the job).
if done right, the bolts should be able to be torqued up and the wishbone should be easy to move (almost under it's own weight), but not 'loose'.
yes, they don't last forever, but assuming you're not giving them a salt bath every day etc, (or pressure washing them!), they only need a look at every year or so (and usually that's just a case of checking them and clean/regrease if required)
I don't like Polly because they usually are too sloppy and have serrated bush tubes that eat though the bush etc.
if you want compliance, use OEM ones, Lotus may be bad at many things, but they did a good job of specing them, the only real issue is they have a relatively short life.
