Subaru IMPREZA 2002 Service Manual page 342

GENERAL DIAGNOSTIC TABLE
CLUTCH SYSTEM
Symptom
4. Noisy clutch
Examine whether the noise is generated
when the clutch is disengaged, engaged,
or partially engaged.
I
Possible cause Corrective
Replace release bearing.
Apply grease.
Replace clutch disc.
(a) Broken, worn or unlubricated release
bearing
(b) Insufficient lubrication of pilot bearing
(c) Loose clutch disc hub
5. Clutch grabs.
When starting the vehicle with the clutch
partially the clutch engages
suddenly and the vehicle jumps instead
of making a smooth start.
I
(d) Loose torsion spring retainer
I
Replace clutch disc.
(e) Deteriorated or broken torsion spring Replace clutch disc.
(a) Grease or oil on facing Replace clutch disc.
(b) Deteriorated cushioning spring Replace clutch disc.
(c) Worn or rusted spline of clutch disc or Take off rust, apply grease or replace
main shaft
clutch disc or main shaft.
(d) Deteriorated or broken torsion spring Replace clutch disc.
(e) Loose engine mounting Retighten or replace mounting.
(f) Deteriorated diaphragm spring Replace.
Trouble
2. CLUTCH PEDAL
Corrective action
Insufficient pedal play
Clutch pedal free play insufficient
Excessively worn and damaged pedal shaft and/or bushing
Adjust pedal play.
Adjust pedal free play.
Replace bushing and/or shaft with new one.
3. DIAGNOSTIC DIAGRAM OF CLUTCH DRAG
rom the transmission gear?
Step
CHECK GEAR NOISE.
1)Start the engine.
2)Disengage the clutch and shift quickly from
neutral to reverse in idling condition.
Disengage the clutch at idle and shift from neu-
tral to reverse within 0.5
-
1 .O seconds.
! CHECK GEAR NOISE.
I CHECK GEAR NOISE.
1)Disengage the clutch at idle and shift from
neutral to reverse within 0.5
-
1 .O seconds.
2)With the clutch disengaged, shift from N to
R. R to N several times.
rom the transmission gear?
Inspect clutch disc,
clutch cover, clutch
release, and clutch
pedal free play.
No
Clutch is normal.
Defective trans-
mission or exces-
sive clutch drag
torque.
Inspect Pilot bear-
ing, clutch disc,
transmission and
clutch disc hub
spline.
Clutch and fly-
wheel seizure.
Inspect clutch disc,
spline of clutch
disc hub.
CL-32