Eh, whoever lowered Ur car doesn't know what they are on about..
There are two ways of adjusting them..
The wrong way is:
By removing one of the torx bolts from each of the torsion bars then knocking each of the radius arms of the beam then lifting it up and pushing it back on using the splines as the guide..
By doing it this way is is very very likely that the needle roller bearings and oil seals in the arms will be irreversably damaged..
It will not be immediately apparent, however after some time the bearing will slowly collapse and the rear wheel camber will become excessive..
By the above method each "spline" will be around 36mm.. So Ur car has been lowered 2 "splines"...
I Know that this is the way that many "tuners" do it but it is not correct..
Especially with the 206, as the needle bearings are very fine and are not captive within the bearing housing..
Whereas the 106/saxo for example have bigger rollers and are captive and have a little less of a tendancy to be damaged..
But in each case the oil seals are fragile if mishandled.. water gets in and then the whole beam could be destroyed..
The correct way is:
To completely remove each of the torsion bars in turn.. Raising the radius arm the amount you want the car to be lowered by.
Then reinserting the bar into the beam & arm assembly..
By this method the radius arm does not need to be knocked off the beam, and therefore the roller bearings will remain intact..
With this method the car can be lowered in steps of 1mm or so..
It is unwise to lower the rear of the car more than the front, as this will seriously affect the way the car handles due the chassis design and could cause U to loose control in not to extreme conditions..
ie: So if the car has 35mm lowering springs fitted then it should only be lowered 35mm at the rear..
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