Clutch preload

[romkasponka]

How to do it right?

[bmwman91]

Which preload are you speaking of? As far as I am aware, nothing should be preloaded, unless you are speaking about the clamping force induced on the clutch disc by the pressure plate as you tighten the 6 allen screws on the PP. Those should be tightened ALL the way down to 19ft-lbs IIRC. They are sort of a pain too as you have to go around tightening all 6 a couple turns at a time so the PP seats properly.

[romkasponka]

You should mashine flywheel where pressure plate is attached about 0,5mm and you get preload. But it's different on variuos cars.