I supported mine to keep the weight off the brake lines.Viren wrote:Do you leave the hub hanging or have it rested/raised on car jackVRSteve wrote:The idea is that the bush shouldn't be under tension when the car is sitting on its wheels.Viren wrote:Whats the technique to preload the bush, I have tried to look in to this but could not understand the process to go through
The BMW tool bolts to the RTAB cage and then holds the cage 8mm above the centre line of the axle, while the cage is held in place you bolt the cage to the RTAB, so maintaining the position.
I bolted a flat bar to the cage and just rested it level with the top of the hub nut. Its less than 8mm, but I'm running at a non standard ride height, so will be close enough.
It doesn't matter if the hub is hanging or supported because you are setting the position of the bush cage relative to the axle, not to the car or anything else.