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Pinpoint Test L: Clutch Vibration

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. L1 CHECK ENGINE COMPONENTS FOR GROUNDING 
      NOTE: Make sure the clutch is the cause of the vibration concern. The vibration should occur during clutch operation. The clutch can also be difficult to engage or disengage. Eliminate all related systems before checking the clutch components.
      NOTE: Check the driveline angles and driveshaft runout before disassembling the clutch system. Refer to DRIVELINE SYSTEM-GENERAL INFORMATION .
    • Check the powertrain/drivetrain mounts, exhaust manifolds or other engine components for grounding on the chassis.
    • Are any mounts or engine components grounded? 
    1. Yes  : REPAIR as necessary. TEST the system for normal operation.
    2. No  : GO to L2.
  2. L2 CHECK THE ACCESSORY DRIVE BELT 
    • Remove the accessory drive belt.
    • Does the vibration stop with the accessory drive belt removed? 
    1. Yes  : DIAGNOSE the accessory drive components.
    2. No  : GO to L3.
  3. L3 CHECK FOR LOOSE CLUTCH PRESSURE PLATE BOLTS 
    • Check for loose clutch pressure plate bolts. Inspect the clutch pressure plate for damage or for material between the pressure plate and flywheel.
    • Are there any loose bolts or damage? 
    1. Yes  : TIGHTEN the bolts to specifications or if damaged, INSTALL a new clutch pressure plate. REFER to CLUTCH . TEST the system for normal operation.
    2. No  : GO to L4.
  4. L4 CHECK THE CLUTCH DISC SPRINGS 
    • Check for worn, broken or loose clutch disc springs.
    • Are the clutch springs worn, broken or loose? 
    1. Yes  : INSTALL a new clutch disc. REFER to CLUTCH . TEST the system for normal operation.
    2. No  : GO to L5.
  5. L5 CHECK THE CLUTCH DISC SPLINES 
    • Inspect the clutch disc splines for damage or wear.
    • Is there damage or wear? 
    1. Yes  : INSTALL a new clutch disc. REFER to CLUTCH . TEST the system for normal operation.
    2. No  : GO to L6.
  6. L6 CHECK THE FLYWHEEL BOLTS 
    • Check for loose flywheel bolts.
    • Are the bolts loose? 
    1. Yes  : TIGHTEN the bolts to specifications. Refer to the appropriate ENGINE article. TEST the system for normal operation.
    2. No  : GO to L7.
  7. L7 CHECK THE FLYWHEEL SURFACE 
    • Inspect the flywheel surface for wear or damage. Check the flywheel runout.
    • Is there any damage or excessive wear? 
    1. Yes  : INSTALL a new flywheel. Refer to the appropriate ENGINE article. TEST the system for normal operation.
    2. No  : Clutch system normal. CONDUCT a diagnosis on other suspect systems.
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