Subaru 2002 IMPREZA Service Manual page 1888

CLUTCH SYSTEM
Symptom
4. Noisy clutch
Examine whether the noise is generated
when the clutch is disengaged, engaged,
or partially engaged.
5. Clutch grabs.
When starting the vehicle with the clutch
partially engaged, the clutch engages
suddenly and the vehicle jumps instead
of making a smooth start.
2. CLUTCH PEDAL
Insufficient pedal play
Clutch pedal free play insufficient
Excessively worn and damaged pedal shaft and/or bushing
3. DIAGNOSTIC DIAGRAM OF CLUTCH DRAG
Step
1 CHECK GEAR NOISE.
1)Start the engine.
2)Disengage the clutch and shift quickly from
neutral to reverse in idling condition.
2 CHECK GEAR NOISE.
Disengage the clutch at idle and shift from neu-
tral to reverse within 0.5 — 1.0 seconds.
3 CHECK GEAR NOISE.
1)Disengage the clutch at idle and shift from
neutral to reverse within 0.5 — 1.0 seconds.
2)With the clutch disengaged, shift from N to
R, R to N several times.
GENERAL DIAGNOSTIC TABLE
Possible cause
(a) Broken, worn or unlubricated release
bearing
(b) Insufficient lubrication of pilot bearing
(c) Loose clutch disc hub
(d) Loose torsion spring retainer
(e) Deteriorated or broken torsion spring
(a) Grease or oil on facing
(b) Deteriorated cushioning spring
(c) Worn or rusted spline of clutch disc or
main shaft
(d) Deteriorated or broken torsion spring
(e) Loose engine mounting
(f) Deteriorated diaphragm spring
Trouble
Adjust pedal play.
Adjust pedal free play.
Replace the bushing and/or shaft with a new one.
Check
Is there any abnormal noise
from the transmission gear?
Is there any abnormal noise
from the transmission gear?
Is there any abnormal noise
from the transmission gear?
CL-52
Corrective
Replace the release bearing.
Apply grease.
Replace the clutch disc.
Replace the clutch disc.
Replace the clutch disc.
Replace the clutch disc.
Replace the clutch disc.
Take off rust, apply grease or replace the
clutch disc or main shaft.
Replace the clutch disc.
Retighten or replace the mounting.
Replace.
Corrective action
Yes
Go to step 2. Clutch is normal.
Go to step 3. Defective trans-
mission or exces-
sive clutch drag
torque.
Inspect the pilot
bearing, clutch
disc, transmission
and clutch disc
hub spline.
Defect in clutch Clutch and fly-
disengaging. wheel seizure.
Inspect the clutch Inspect the clutch
disc, clutch cover, disc, spline of
clutch release, and clutch disc hub.
clutch pedal free
play.
No