Subaru Impreza 2003, Service Manual

Page: 2135 / 3610

FS-19
FRONT SUSPENSION
FRONT BALL JOINT
4. Front Ball Joint
A: REMOVAL
1) Remove the wheel.
2) Pull out the cotter pin from ball stud, remove the
castle nut, and extract the ball stud from transverse
link.
3) Remove the bolt securing ball joint to housing.
4) Extract the ball joint from housing.
B: INSTALLATION
1) Install the ball joint onto housing.
Tightening torque (Bolt):
50 N·m (5.1 kgf-m, 37 ft-lb)
CAUTION:
Do not apply grease to tapered portion of ball
stud.
2) Connect the ball joint to transverse link.
Tightening torque (Castle nut):
Sedan turbo model:
30 N·m (3.1 kgf-m, 22 ft-lb)
Except sedan turbo model:
40 N·m (4.1 kgf-m, 30 ft-lb)
3) Retighten the castle nut further within 60
°
until a
slot in castle nut is aligned with the hole in ball stud
end, then insert a new cotter pin and bend it around
castle nut.
4) Install the front wheel.
C: INSPECTION
1) Measure the play of ball joint by the following
procedures. Replace with a new one when the play
exceeds specified value.
(1) With 686 N (70 kgf, 154 lb) loaded in direc-
tion shown in the figure, measure the dimension
2
1
.
(2) With 686 N (70 kgf, 154 lb) loaded in oppo-
site direction shown in the figure, measure the
dimension
2
2
.
(3) Calculate plays from the following formula.
S =
2
2
− 2
1
(4) When plays are larger than the following val-
ue, replace with a new one.
FRONT BALL JOINT
Specified play for replacement: S
Less than 0.3 mm (0.012 in)
2) When the play is smaller than specified value, vi-
sually inspect the dust cover.
3) The ball joint and cover that have been removed
must be checked for wear, damage or cracks, and
any defective part must be replaced.
4) If the dust cover is damaged, replace with a new
ball joint.
FS-00034
FS-00035
FS-00036