Well with regards to the Kilen rear springs I can tell you this

1) we have all had rear suspension tracking / tyre wear problems
2) on Fiat springs I had a full 4 wheel laser/computer alignment done with critical focus on the rear where all the problems are
3) after fitting Kilen rear springs I had the 4 wheel laser/computer alignment done again as I was expecting a different ride height which seriously affects both camber and toe on the GM multi-link rear suspension.

I was really pleased to find that the rear geometry was the same!

Fiat have tapered coil springs with given ride height
Kilen springs are not tapered but have idential ride height and do not appear to affect rear suspension geometry.

This is what I found but, as they say, "your mileage may vary".

I have changed all four of my springs and after a settling period I had a full alignment check on Friday and was surprised that no adjustments were needed.

Just got both our fronts changed today. £70 from a local shop including a replacement drop link - I changed both of them only a couple of months ago, but one got bent when the spring snapped.

I don't see much corrosion where it has snapped. I'm no expert on metal fatigue but it's all a dull grey colour apart from some surface corrosion.

Having started this thread 18months ago I can now report thet the rear springs have just broken (57000 miles) I have no idea as to the make of the new springs but the ride quality and noise from the rear suspension has improved. Previously it made a noise like 'What about a water bottle Wibble' when traversing the dreaded conical speed humps.
Anyway that was last month and the latest is that the 40 mph wheel wobble is now upon us.
You simply cannot relax with a Croma.

kennethgordon said:

what about a water bottle wibble

Click to expand...

:d