Pinpoint Test E: Clutch Related Vibrations

E1: CHECK FOR ENGINE COMPONENT GROUNDING
NOTE:
- If a new clutch assembly is installed in the unreleased position, some clutch judder may be experienced.
- If a new clutch assembly is installed, the new unit should be bedded-in (this may be accomplished through 1 hour of in-town driving or similar).
1. Raise and support the vehicle
2. Check the engine mountings for grounding on the body frame
3. Check the exhaust manifold or other engine component grounding on the body or frame
  Is there evidence of grounding on body or frame?
  
  Yes
  
  Repair or install new components as necessary. Test the system for normal operation
  
  No
  
  GO to E2
E2: CHECK FOR ACCESSORY DRIVE VIBRATIONS
1. Feel accessory vibration at clutch engage/disengage when engine torque changes
2. Disconnect the accessory drive belt and check for vibration
  Does the vibration stop when the accessory drive belt has been removed from the engine?
  
  Yes
  
  Repair or install new accessory drive belt components as necessary
  
  No
  
  GO to E3
E3: CHECK FOR RELEASE BEARING NOISE
1. Start the engine
2. Depress and hold the clutch pedal
  Is a whirring, grating or grinding noise present?
  
  Yes
  
  Install a new clutch assembly. Test the system for normal operation
  
  No
  
  GO to E4
E4: INSPECT FLYWHEEL
1. Remove the transmission
2. Check for loose flywheel bolts
  Is the flywheel installed correctly?
  
  Yes
  
  Diagnose engine vibration concern
  
  No
  
  If flywheel bolts are loose, they will need to be removed, the threads cleaned of oil and the bolts replaced with new fixings.
  
  If the flywheel is damaged, install a new flywheel. Test the system for normal operation