Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 478
RS-19
General Diagnostic Table
REAR SUSPENSION
10.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 damaged coil spring
Replace.
(2) Rough operation of strut or shock absorber
Replace.
(3) Improper installation of strut or shock absorber
Replace with proper parts.
(4) Installation of the wrong coil spring
Replace with proper parts.
Possible cause
Corrective action
(1) Damaged coil spring
Replace.
(2) Overinflation of tires
Adjust.
(3) Improper wheel arch height
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.