Diagnosing clutch faults (Renault Clio 1)

The pedal falls through or is pressed with little resistance

• The cable is very loose or broken (Section 6).
• Incorrect adjustment of the clutch pedal stroke (Section 6).
• The release bearing or lever is broken (Section 6).
• The diaphragm spring in the clutch pressure plate is broken (Section 6).

The clutch does not disengage

(unable to change gear)

• Incorrect adjustment of the clutch pedal stroke (Section 6).
• The clutch friction disc is jammed in the grooves of the gearbox input shaft (Section 6).
• The clutch friction disc is stuck to the flywheel or pressure plate (Section 6).
• The pressure plate block is faulty (Section 6).
• The clutch release mechanism is worn or tightly assembled (Section 6).

Clutch slippage

(increasing engine speed without increasing vehicle speed)

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• Defective self-adjusting clutch pedal adjuster (Section 6).
• The clutch friction linings are excessively worn (Section 6).
• The clutch friction linings are contaminated with oil or grease (Section 6).
• The pressure plate is faulty or the diaphragm spring is weak (Section 6).

When the clutch is engaged, the car moves jerkily

• The clutch friction linings are contaminated with oil or grease (Section 6).
• The clutch friction linings are excessively worn (Section 6).
• The pressure plate or diaphragm spring is faulty or deformed (Section 6).
• Engine or gearbox mounts are worn or loose (Section 6).
• The grooves of the clutch friction disc hub or the gearbox input shaft are worn out (Section 6).

Noise when pressing or releasing the clutch pedal

• The release bearing is worn out (Section 6).
• The clutch pedal pivot shaft is worn or not lubricated (Section 6).
• The pressure plate block is faulty (Section 6).
• The diaphragm spring of the pressure plate is broken (Section 6).
• The damper springs of the clutch friction disc are broken (Section 6).