Changing the outer steering ball joint on Citroën C4 I

lift the vehicle and remove the wheel

follow the tutorial Vehicle safety: dismantling and reassembly of the wheel

locate the steering ball joint to replace

use a ruler and measure the setting to the millimeter before disassembly

you have to measure between the shoulder and the nut

here 26mm

If the new ball joint is not adjusted identically, you will need to have the alignment adjusted by a professional.

you have to spray precisely at the level of the 2 nuts

Pay attention to the brake discs and pads

Using 2 flat wrenches, loosen the first nut.

Do not unscrew the ball joint completely.

with a socket wrench unscrew the 2nd nut

Using a mallet, extract the ball joint from the wheel spindle.

several blows are necessary to remove the kneecap

finish loosening the ball joint by hand

compare size/shape/threads between new and old ball joint

adjust the old ball joint to the value before disassembly (step 2)

place the 2 ball joints side by side and adjust the new ball joint to have the same setting

Screw the ball joint back into the steering rod and tighten the nut

do not change the setting

tighten the 2nd nut, this will gently raise the ball joint into the wheel spindle

degrease with a cloth

check the tightness of the 2 nuts one last time (strong tightening)

degrease the brakes if necessary

wheel reassembly

If you had a problem during the adjustment, you will need to do a parallelism adjustment.