Subaru 2009 IMPREZA, Service Manual

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FS-24
Front Strut
FRONT SUSPENSION
E: INSPECTION
Check the removed part for wear, damage and
cracks, and then repair or replace it if defective.
1. STRUT
1) Check for oil leaks.
2) Move the piston rod up and down to check that it
operates smoothly without any hitch.
3) Piston rod play
• Measure the play as follows:
Fix the outer shell in place and fully extend the rod.
Set a dial gauge at the end of rod L [10 mm (0.39
in)], and then read the dial gauge indication P
1
while applying a force of W [20 N (2 kgf, 4 lbf)] to
the threaded portion. Apply a force of 20 N (2 kgf, 4
lbf) from the opposite direction of “W”, and then
read the dial gauge indication P
2
.
Play limit (P
1
+ P
2
):
0.8 mm (0.031 in)
If the play exceeds limit, replace the strut.
2. STRUT MOUNT
Check the rubber part for deformation, cracks or
deterioration, and then replace it with a new part if
defective.
3. DUST COVER
If major cracks or damage are found, replace it with
a new part.
4. COIL SPRING
If a permanent strain is found, replaced it with a
new part.
5. HELPER
If major cracks or damage are found, replace it with
a new part.
F: DISPOSAL
CAUTION:
• Before handling struts, be sure to wear gog-
gles to protect eyes from gas, oil and cutting
powder.
• Do not disassemble the strut damper or
throw into flames.
• When discarding gas filled struts, drill holes
in them to purge the gas.
1) Place the strut on a level surface with the piston
rod fully expanded.
2) Using a 2 — 3 mm (0.08 — 0.12 in) dia. drill,
make holes in areas shown in the figure.
FS-00046
W
L
(1) 40 mm (1.57 in)
FS-00047
(1)