Subaru Legacy IV (2008 year). Manual - part 844

 

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Subaru Legacy IV (2008 year). Manual - part 844

 

 

FS-23

Front Strut

FRONT SUSPENSION

5) Set the coil spring correctly so that its end face
seats well in the spring seat as shown in the figure.

6) Install the helper and dust cover to the piston
rod.
7) Pull the piston rod fully upward, and install the
spring seat.

NOTE:
Position the upper spring seat as shown in the fig-
ure.

8) Install spacer and the strut mount to piston rod,
and tighten a new self-locking nut temporarily.
9) Using a hexagon wrench to prevent strut rod
from turning, tighten the new self-locking nut with
ST.
ST

20399AG000 STRUT MOUNT SOCKET

Tightening torque:

55 N·m (5.6 kgf-m, 41 ft-lb)

10) Loosen the coil spring compressor carefully.

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 ap-

plying a force of W [20 N (2 kgf, 4 lb)] to the threaded
portion. Apply a force of 20 N (2 kgf, 4 lb) 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.

(1) Coil spring end face

(1) Outside of body

FS-00043

(1)

FS-00128

(1)

FS-00041

ST

FS-00046

W

L

FS-24

Front Strut

FRONT SUSPENSION

F: DISPOSAL

1. EXCEPT FOR BILSTEIN STRUT

CAUTION:
• Before handling struts, be sure to wear goggles
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.

2. BILSTEIN STRUT

CAUTION:
• Before handling struts filled with gas, be sure
to wear goggles to protect eyes from gas, oil
and metal shavings.
• 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 gas-filled strut on a level surface with
the damping tube fully extended.
2) Using a 2 — 3 mm (0.08 — 0.12 in) dia. drill,
make the holes at (1) first, and then (2).

(1) 40 mm (1.57 in)

(1) 20 mm (0.78 in)

(2) 10 mm (0.39 in)

(3) Strut

(4) Damping tube

FS-00047

(1)

FS-00096

(1)

(4)

(2)

(3)

FS-25

Front Crossmember

FRONT SUSPENSION

8. Front Crossmember

A: REMOVAL

1) Lift up the vehicle, and then remove the front
wheels.
2) Remove the front exhaust pipe.
3) Remove the front crossmember support plate.
<Ref. to FS-14, REMOVAL, Front Crossmember
Support Plate.>
4) Remove the front stabilizer. <Ref. to FS-15, RE-
MOVAL, Front Stabilizer.>
5) Disconnect the tie-rod end from housing.
6) Remove the front arm. <Ref. to FS-18, REMOV-
AL, Front Arm.>
7) Remove the nuts attaching the engine mount
cushion rubber to crossmember.

8) Remove the steering universal joint.
9) Disconnect the power steering hose from steer-
ing gearbox.
10) Lift the engine approx. 10 mm (0.39 in) using a
chain block.
11) Support the crossmember with a jack, remove
the bolts securing crossmember to body, and then
gradually lower the crossmember with steering
gearbox as a unit.

CAUTION:
When removing the crossmember downward,
be careful that the tie-rod end does not interfere
with drive shaft boot.

B: INSTALLATION

1) Install in the reverse order of removal.

CAUTION:
• Use a new bolt and self-locking nut. For parts
which are not reusable, refer to COMPONENT.
<Ref. to FS-3, COMPONENT, General Descrip-
tion.>
• Always tighten the stabilizer bushing in the
state where the vehicle is at curb weight and
the wheels are in full contact with the ground.

Tightening torque:

Crossmember to body:

95 N·m (9.7 kgf-m, 70.1 ft-lb)

Engine mounting to Crossmember:

75 N·m (7.6 kgf-m, 55.3 ft-lb)

Front arm to Crossmember:

95 N·m (9.7 kgf-m, 70.1 ft-lb)

Front arm to Support plate:

88 N·m (9.0 kgf-m, 64.9 ft-lb)

Support plate to Body:

150 N·m (15.3 kgf-m, 110.6 ft-lb)

Tie-rod end to Housing:

27.0 N·m (2.75 kgf-m, 19.9 ft-lb)

After tightening to the specified torque, tighten the
castle nut further but within 60° until the hole in the
ball stud is aligned with a slot in castle nut

Universal joint:

24 N·m (2.4 kgf-m, 17.7 ft-lb)

Stabilizer bracket:

25 N·m (2.5 kgf-m, 18.1 ft-lb)

Stabilizer link:

45 N·m (4.6 kgf-m, 33.2 ft-lb)

Power steering hose to Steering gearbox:

15 N·m (1.5 kgf-m, 11 ft-lb)

2) Purge air from the power steering system.
3) Inspect the wheel alignment and adjust if neces-
sary.

C: INSPECTION

Check the crossmember for wear, damage or
cracks, and then repair or replace if faulty.

FS-00118

FS-00119

FS-26

General Diagnostic Table

FRONT SUSPENSION

9. General Diagnostic Table

A: INSPECTION

1. IMPROPER VEHICLE POSTURE OR IMPROPER WHEEL ARCH HEIGHT

2. POOR RIDE COMFORT

1) Large rebound shock
2) Rocking of the vehicle continues too long after running over bump and hump.
3) Excessive shock in bumping

3. NOISE

Possible cause

Corrective action

(1) Permanent distortion or damage of the coil spring

Replace.

(2) Rough operation of strut or shock absorber

Replace.

(3) Improper installation of strut or shock absorber

Replace with appropriate parts.

(4) Installation of the wrong coil spring

Replace with appropriate parts.

Possible cause

Corrective action

(1) Damaged coil spring

Replace.

(2) Overinflation of tires

Adjust.

(3) Improper wheel arch height

Adjust or replace the coil springs with new parts.

(4) Fault in operation of strut or shock absorber

Replace.

(5) Damage or deformation of strut mount or shock absorber mount

Replace.

(6) Unsuitable length (maximum or minimum) of strut or shock absorber

Replace with appropriate parts.

(7) Deformation or loss of bushing

Replace.

(8) Deformation or damage of helper in strut assembly or shock absorber

Replace.

(9) Oil leakage from the strut or shock absorber

Replace.

Possible cause

Corrective action

(1) Wear or damage of strut or shock absorber component parts

Replace.

(2) Loosening of the suspension link installing bolt

Tighten to the specified torque.

(3) Deformation or loss of bushing

Replace.

(4) Unsuitable length (maximum or minimum) of strut or shock absorber

Replace with appropriate parts.

(5) Damaged coil spring

Replace.

(6) Wear or damage of the ball joint

Replace.

(7) Deformation of the stabilizer clamp

Replace.

 

 

 

 

 

 

 

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