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      07-31-2019, 06:36 PM   #98
atlas
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Drives: F10 535i, M2 LCI, G05 X5 40i
Join Date: Nov 2009
Location: Melbourne, Australia

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Quote:
Originally Posted by Caduceus View Post
This has been discussed here before. Assuming you have the rear adjustable perches installed correctly at the top of the spring, yes it can be done but it is a lot harder than it should be.

Firstly, the wheel arch liners limit the arc you can swing the C-spanner through on the adjustment ring. You can only barely get it moved one notch at a time then you have to re-position the C-spanner and keep going over and over.

Secondly, when you do turn it, often the base plate will rotate against the car bodywork so it isn’t making an adjustment at all. There are various solutions offered which range from munting your adjusters with an angle grinder so you can hold it in place with a screw driver (not recommended) to applying some sort of a c-clamp to the base plate to stop it moving. What I find works best is to turn the c-spanner very rapidly in a jerking motion – this is less likely to rotate the base plate compared to a slow gentle turning motion.

Another option to consider it getting your installer to apply some sort of medium strength bonding agent (like Sikaflex) to the base plate during install. This will stop it rotating during adjustment but not make it impossible to remove in future. Or you could fix it in place by punching a set-screw through it.

Finally, if you need to adjust more than two or three full turns, you are probably better doing what KW recommend which is to remove the spring completely. If you try and turn it a dozen or more turns by working one notch at a time, that’s going to get infuriating really fast.
Cheers thanks for the very helpful explanation - confirmed my suspicions! I ended up taking it back to my installer to remove the springs and adjust the height for me. After watching him do it, I’m glad I didn’t attempt it myself!
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