Let me try and answer a few questions comments in one post and for the archives.
- Bought first set in 2015 - sat in plastic box in bubble wrapping while I collected the parts for a front suspension refresh.
- First set of springs installed July 2017, car mileage 170,040.
- First set broke almost exactly 6000 miles and 1 year later.
- Second set installed September 2018, car mileage 176,050.
- Second set broke in February 2021, mileage around 188,250 so they lasted roughly 12,000 miles and 2.5 years
I don’t think I was driving on them for very long after the break as the droop was pretty obvious after it happened. Pretty sure they gave way while parked, don’t remember any load noises or banging while driving. Car sits in a detached garage so would not hear any loud noise if it collapsed in the night.
Kirbert - yes I bought both sets from the same place. I thought enough time had passed that it was likely to at least be a different batch. And I felt I had left the first pair stored for too long before fitting them to realistically make a claim from the vendor.
A.J - conditions are normal Irish conditions - yes it’s wet & cold! But also my boy-racing days are behind me I don’t throw the car at kerbs or speed ramps, prefer to cruise at my age.
Cosmo - the springs have a flat top and bottom. Here is a picture from pre-install.
Maybe someone recognizes the white/yellow markings?
Gregma - I’ve sourced a set of Eibach which are on their way to me this week. They come with a few extra packing rings to dial in the ride height so hopefully I won’t be off the road too long.
My money (twice!) is on a manufacturing defect. But also, I obviously have a new set of springs to install in my near future so that is the reason for my original question about bad installation causing extra stress. I’ve also got some pre-owned spring pans on the way which I will clean up & paint for a better install.