Subaru IMPREZA 2002 Service Manual page 27

I
FRONT STRUT
FRONT SUSPENSION
10) Loosen the coil spring carefully.
E: INSPECTION
Check the disassembled parts for cracks, damage
and wear, and replace with new parts if defective.
1. DAMPER STRUT
1) Check for oil leakage.
2) Move the piston rod up and down to check that it
operates smoothly without any binding.
3) Play of piston rod
Measure the play as follows:
Fix the outer shell and fully extend the rod. Set a
dial gauge at the end of the rod: L [ l o mm (0.39
in)], then apply a force of W [20 N (2 kgf, 4 Ib)] to
threaded portion. With the force of 20 N (2 kgf, 4 Ib)
applied, read the dial gauge indication: PI. Apply a
force of 20 N (2 kgf, 4 Ib) in the opposite direction
of "W", then read the dial gauge indication: P , .
The free play is determined by the following equa-
tion:
Play = PI, P2
Limit of play:
If the play is greater, replace the strut.
2. STRUT MOUNT
Check the rubber part for creep, cracks and deteri-
oration, and replace it with a new one if defective.
3. DUSTCOVER
If any cracks or damage are found, replace it with a
new one.
4. COIL SPRING
One having permanent strain should be replaced
with a new one. When the vehicle posture is un-
even, although there are no considerable reasons
like tire puncture, uneven loading, etc., check the
coil spring for its free length referring to specifica-
tions, cracks, etc., and replace it with a new one if
defective.
Less than 0.8 mm (0.031 in)
5. HELPER
Replace it with a new one if cracked or damaged.
F: DISPOSAL
CAUTION:
On struts which have "GAS FILLED" marked
on the outer housing under spring seat, com-
pletely discharge the gas before disposing, fol-
lowing the methods below.
Do not disassemble the strut damper or place
into a fire.
Drill holes before disposing of gas filled
struts.
Before handling gas filled struts, be sure to
wear goggles to protect eyes from gas, oil and/
or filings.
GAS FILLED
DO NOT OPEN
DO NOT HEAT
I
B4M1201
1) Place the gas filled strut on a flat and level sur-
face with piston rod fully extended.
2) Using a 2 to 3 mm (0.08 to 0.12 in) dia. drill,
make holes in areas shown in the figure.
I
piston
rod ,-Strut
M
(1.57 in)
B4M1202P
FS-23