How is the Clutch System Diagnosed?
Diagnosis of a clutch is as simple as attempting to drive the vehicle. If the clutch is slightly disengaged without pressing the clutch pedal, slightly engaged while pressing the clutch pedal to the floor, or does not engage or disengage under any circumstances, it will be adjusted. If adjustment fails to remedy the situation, the clutch will be replaced.
How is the Clutch Assembly Adjusted?
Adjusting the clutch is most typical for cable type clutches, and the cable will be adjusted by changing the length of the cable on the clutch fork. This can be done with shims or an adjusting nut. Hydraulic clutches have some adjustment at the clutch pedal, and many can be adjusted by turning an adjusting screw and pinch-nut on the slave cylinder or moving the slave cylinder in eccentric holes. However, in some cases, changing the pushrod for the slave cylinder is necessary for adjustment, and this is typically not performed.
RepairPal Recommendations for Clutch Assembly issues
We recommend having any vehicle with clutch issues towed instead of driven to the repair facility. Clutch issues become much more expensive if the clutch is allowed to wear due to adjustment, but adjustment is typically a fast and economical repair. Also, we recommend having the flywheel replaced or resurfaced when replacing the clutch. This will limit slippage of the new clutch by ensuring maximum friction and contact between the clutch disc and the flywheel.
What to look out for when dealing with Clutch System issues
If the vehicle uses a hydraulic clutch, a small leak in the hydraulic clutch master cylinder, line, or slave cylinder will cause the same symptoms as a clutch which is out of adjustment. Ensure the system is leak free before attempting to adjust the system. Some cable type clutches adjust at the clutch pedal or firewall instead of the clutch fork, so locating the components of the clutch system is necessary. Lastly, if the clutch is unadjustable or self adjusting, yet the clutch begins to give failure symptoms, the clutch should be replaced.
Can I adjust the Clutch Assembly?
The advanced DIY mechanic can adjust the clutch with no problem, however, if proper procedure is not followed or there is a lack of experience or knowledge of the clutch assembly, the repair or adjustment should be left to a professional technician. This may help prevent premature clutch failure and unpredictable clutch performance.
