Lower Arm Mounting bolts 62-68Nm
Lower Arm Ball joint 86-95Nm
Lower Fork to Bottom arm bolt 81-89Nm
Upper wishbone ball joint 43-47Nm
Upper Turret strut mounting 24-29Nm
Upper Wishbone mounting bolt 40-49Nm
So to recap quickly:
Jack up and axle stand the car
Remove road wheel
Remove the wheel arch liner and small black filter box if fitted or alarm box dependent on which side (you don't have to disconnect them)
Undo top upper ball joint nut and separate the joint.
Undo the long upper bolt and nut.
Push it towards the coil spring as far as it will go.
Use a 4 inch angle grinder to cut off the old bolt head and clean off the swarf with a file.
Spray some lubricant on the bolt shaft to help it back through...
Put the old nut back on for leverage (use a small ring spanner on the shaft but smaller than the nut itself and pull it back towards the rear of the car...
Remove the old wishbone and refit the greased up and ready to go new one...
Push the new bolt in from the rear towards the coil spring and place the new nut on the end, tighten up to specified torque.
Place the ball joint shaft into the ball joint housing and push down.
Tighten up the ball joint nut.
Refit the black box to the upper inner wing
Replace the inner wheel arch.
Refit Road wheel
Remove from axle stands and jack
tighten up wheel studs...
Job done (30 mins) Have a cuppa!
Done 8 pairs of upper wishbones on 147,156 and GT recently after contacting the head technician at Benfield Alfa and asked why the upper wishbone bolt head was at the coil spring end and not in the other way? He couldn't give me an answer for it apart from when it was built at the factory originally, they all came out like that... !
Do not over tighten or it squashes the bushes out of shape.... Look at it this way, if under tightened the bolt will work loose and hit against the top of the inner plastic wheel arch but not come out of the bushes.... If it works loose the OE way it will get between the coils of the spring and come out of one bush!!! I know what I would prefer it to do