Clutch System Problem Symptoms Table

Use the table below to help find the cause of the problem. The numbers indicate the likelihood of the possible causes of the problem in descending order. Check each part in order. Replace parts as necessary.

Symptom

Suspected area

See page

Clutch grabs/chatters

1. Engine mounting (Loose)

-

2. Clutch disc assembly (Excessive runout)

CL-15

3. Clutch disc assembly (Oily)

CL-15

4. Clutch disc assembly (Worn out)

CL-15

5. Clutch disc torsion spring (Damaged)

CL-15

6. Clutch disc assembly (Glazed)

CL-15

7. Diaphragm spring (Tip out of alignment)

CL-15

Clutch pedal spongy

1. Clutch line (Air in line)

-

2. Master cylinder cup (Damaged)

CL-9

3. Release cylinder rubber (Damaged)

CL-12

Clutch noisy

1. Clutch release bearing assembly (Worn, dirty or damaged)

CL-15

2. Clutch disc torsion spring (Damaged)

CL-15

Clutch slips

1. Clutch pedal (Free play out of adjustment)

CL-3

2. Clutch disc assembly (Oily)

CL-15

3. Clutch disc assembly (Worn out)

CL-15

4. Diaphragm spring (Damaged)

CL-15

5. Pressure plate (Distorted)

CL-15

6. Flywheel sub-assembly (Distorted)

CL-15

Clutch does not disengage

1. Clutch pedal (Free play out of adjustment)

CL-3

2. Clutch line (Air in line)

-

3. Master cylinder cup (Damaged)

CL-9

4. Release cylinder cup (Damaged)

CL-12

5. Clutch disc assembly (Out of line)

CL-15

6. Clutch disc assembly (Excessive runout)

CL-15

7. Clutch disc assembly (Lining broken)

CL-15

8. Clutch disc assembly (Dirty or burned)

CL-15

9. Clutch disc assembly (Oily)

CL-15

10. Clutch disc assembly (Lack of spline grease)

CL-15

CLUTCH PEDAL COMPONENTS

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  • Jeffrey Simpson
    How to replace clutch in yaris?
    8 years ago

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