Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 08. MECHANISM AND FUNCTION 37. FRONT SUSPENSION 01. Front Suspension
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W1860BE.book Page 2 Tuesday, January 28, 2003 11:01 PM
FRONT SUSPENSION
FRONT SUSPENSION
1. Front Suspension
A: GENERAL
The front suspension is a strut-type independent suspension, with cylindrical double-acting, low-
pressure-gas-filled dampers and coil springs. The top of each strut assembly is attached to the body
through a rubber cushion. Used in combination with other rubber cushions, this rubber cushion ef-
fectively insulate vibration and shock and thus improves ride comfort.
The transverse link is an L shaped arm design to increase steering stability and reduce road noise.
The transverse link has a maintenance-free ball joint fitted by a castle nut at its outer end. The front
of the link's inner end is fitted to the front crossmember through a rubber cushion and the rear of
the inner end is bolted to the vehicle body through a rubber cushion.
The front crossmember is bolted to the vehicle body.
The stabilizer for wagon models is attached to the front crossmember through rubber cushions and
its right and left ends are connected to the stabilizer links through rubber bushings. The lower end
of the stabilizer link is connected to the transverse link through rubber bushings.
The stabilizer for sedan models is attached to the front crossmember through rubber cushions and
its right and left ends are connected to the stabilizer links through ball joints. The lower end of the
stabilizer link is connected to the transverse link through a ball joint.
A camber angle adjustment mechanism, which uses eccentric bolts, is provided at the joint of the
damper strut and axle housing.
FS-2
W1860BE.book Page 3 Tuesday, January 28, 2003 11:01 PM
FRONT SUSPENSION
FRONT SUSPENSION
(1)
(1)
(2)
(3)
(6) (2)
(4)
(7)
(5)
(3)
FS-00077
(1) Strut mount (5) Stabilizer
(2) Strut (6) Front crossmember
(3) Transverse link (7) Subframe
(4) Stabilizer link
FS-3
W1860BE.book Page 4 Tuesday, January 28, 2003 11:01 PM
FRONT SUSPENSION
FRONT SUSPENSION
On the STi model, the shape of the front crossmember is changed and the number of fastening
points to the sub frame is increased to improve steering stability.
Also, a reinforcement part (front support arm) has been added to the front suspension crossmem-
ber.
(1)
(2)
(3)
FS-00100
(1) Front crossmember
(2) Subframe
(3) Front support arm
FS-4
W1860BE.book Page 5 Tuesday, January 28, 2003 11:01 PM
FRONT SUSPENSION
FRONT SUSPENSION
B: CONSTRUCTION
1. TRANSVERSE LINK
All the sedans have a wider transverse link than wagons for enhanced handling stability. This con-
tributes to increased tread.
The STi model's "L" shaped transverse link are made of an aluminum alloy forging. The caster
angle is increased and solid hard-type rear bushings are used. Reducing the unsprung weight, they
help improve both handling stability and riding comfort.
2. STRUT
All models except STi use struts with low-pressure-gas-filled dampers that feature stable shock
attenuating performance. They improve ride quality and reduce vibration and noise.
On the STi model, upside-down type struts with its shock absorber's top and bottom ends re-
versed are used. This arrangement is advantageous in increasing rigidity as it allows the diameter
of the damping tube (which corresponds to the piston rod in the conventional arrangement) to be
increased to an almost same diameter as the strut's outer tube diameter.
(1)
(2)
(3)
(5) (4)
(7)
(6)
(7)
(8)
(9)
(10) FS-00101
(1) Damping tube (6) Piston
(2) Gas (7) Oil
(3) Free piston (8) Piston rod
(4) Oil seal (9) Outer tube
(5) Cap (10) Nut
FS-5
W1860BE.book Page 6 Tuesday, January 28, 2003 11:01 PM
FRONT SUSPENSION
FRONT SUSPENSION
MEMO
FS-6
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