Potential causes of engagement issues related to installation/modification:

  1. The clutch linkage is out of adjustment. 
  2. The vehicles clutch linkage cable could be stretched from overuse or the clutch quadrant is cracked or broken.

The clutch linkage should be adjusted when a new clutch is installed into a vehicle. Also, a clutch linkage should be re-adjusted after the first 700 miles and every 10,000 miles thereafter. 

  1. Check the clutch master cylinder and slave cylinder for any signs of leaking or failure.  
  2. The hydraulics of the car may be faulty or have air in the lines, it is suggested to bleed the hydraulic system.

Hydraulics could have internal leaks as well which can cause improper operation. Check hydraulic lines for cracks or over expansion. Due to the higher loads from performance plates, the O.E. rubber hydraulic hoses can expand causing an insufficient amount of fluid required to actuate the clutch. 

  1. Ensure the clutch fork is not bent, cracked, or broken. The pivot ball could also be damaged (smashed) causing insufficient actuation. 
  2. Improper or damaged release bearing 
  3. The pressure plate has defective or damaged drive straps.  
  4. The clutch disc or pressure plate assembly is bent or damaged. 
  5. The clutch disc is getting caught on the input shaft. Check the input shaft for any burrs and ensure the disc can move smoothly on the splines before installation. 

When installing it is necessary to use the appropriate amount of grease on the input shaft. Too much grease can result in contamination of the friction surfaces and overheating of the assembly resulting in accelerated failure. Too little grease can result in corrosion or damage to the spline of the hub of the disc or the input shaft as a result of the friction from the two metal surfaces mating or binding.

  1. The clutch disc is installed improperly (backward) or was assembled improperly resulting in the disc contacting the flywheel bolts.  
  2. The flywheel was not re-surfaced or has incorrect flywheel step. 
  3. The input shaft is bent causing clutch disc runout and damage to the spline of the hub of the disc. 


If you have any questions about this article or engagement issues, please contact us at tech@competitionclutch.com or call us at 1 (800) 809-6598. You can also reach us by submitting a ticket to our web portal at https://support.competitionclutch.com/support/login.