Springs are specified by the force needed to compress them, lbs/inch, or kg/cm. Heavier engine, such as your diesel, will need stronger springs, estate would need stronger than hatch, etc. Length is only a guide as to the strength.
Thanks for you reply and for info.I will do tomorrow morning another video with the wishbone bush when steering.The old spring is 478 cm long.
I have the new pair of Sachs springs on the shed which are 479 cm long and I will try to fit it on the one shock,see how it look.I have another question.
After I changed the shocks,spring(the actual ones 481 cm long)and new bearing and top rubber mounting and I had the strut complete(just like in the picture above from our friend)I couldn't turn the top mounting pretty much at all.It should be like that?
I am thinking that because the spring is a bit to hard and slightly longer,it will push the lower mounting and the bearing into the top mounting and that's why I couldn't turn it.And depending on the car balance sometimes the steering "skip".Because the weight of the car is compressing the spring which will not press the bearing with all the strength.Its just a thought.I don't know.
The trouble with the supplier is that first time they sold me the Sachs ones,then the Kyb which are 481 cm long.And as long that I scratch it they will not exchange the springs.
I will try to do a good video in the morning with the bushes and I will be back.Thanks