I jacked up the car (r52 JCW
) level to change the gear oil (bought from BMW dealer) and then drained and refilled as much of the coolant as I could (couldn't find the drain plug for the block) Went for a spin - all good. Then picked up missus from station and when we got home (ie slowed down for speed bumps) I could hear a knocking from what seemed like the front of the car, when slowing and dipping the clutch/braking. It seems to go away under acceleration.
What could it be - would it be related to have all four wheels off the ground - ie suspension issue? Engine mounts? (although they should not have been affected by the lifting) More scary gearbox issues?
All feedback greatly appreciated!