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Home >> Jaguar >> 2021 >> F-Pace R-Dynamic S >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (ENGINE - INGENIUM I4 2.0L DIESEL -- F-PACE (X761) (1 Of 2 )) >> Engine - INGENIUM I4 2.0L Diesel (G1817138) >> Diagnosis And Testing >> Engine Noise - INGENIUM I4 2.0L Diesel (G2468993) >> Pinpoint Tests >> Pinpoint Test D: Dual Mass Flywheel Visual Tests

Pinpoint Test D: Dual Mass Flywheel Visual Tests

WARNING: This page is about a different car, the 2019 Jaguar F-Pace. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The following dual mass flywheel tests are performed after removing the manual transmission and clutch.
  1. D1: VISUAL TEST 1 CHECK CLUTCH DISC FOR WEAR 
    G13900649Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC
    1. Remove the clutch and inspect the clutch disc for wear and damage

    Is the clutch disc worn or damaged?

    Yes  : Inspect the dual mass flywheel for thermal overload, GO to  D2.

    No  : GO to  D6.

  2. D2: VISUAL TEST 2 CHECK DUAL MASS FLYWHEEL FOR THERMAL OVERLOAD 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: Residue of the abraded friction material can penetrate into the arc spring channel and cause dual mass flywheel malfunction.
    1. Inspect the dual mass flywheel for abraded clutch facing sticking up around the edge of the dual mass flywheel or in the ventilation holes
    G13900650Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Are burnt residues of abraded clutch facing sticking up around the edge of the dual mass flywheel or in the ventilation holes?

    Yes  : This indicates a very high thermal load. Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D3.

  3. D3: VISUAL TEST 3 CHECK DUAL MASS FLYWHEEL FOR SCORING 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: Scoring on the dual mass flywheel can cause limited power transmission capability, the clutch is unable to generate the required torque.
    1. Inspect the face of the dual mass flywheel for scoring
    G13900651Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is there any scoring on the face of the dual mass flywheel?

    Yes  : Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D4.

  4. D4: VISUAL TEST 4 CHECK DUAL MASS FLYWHEEL FOR HOT SPOTS 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    1. Inspect the face of the dual mass flywheel for localized dark hot spots, sometimes in large number.
    G13900652Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Are there localized dark hot spots on the face of the dual mass flywheel?

    Yes  : This indicates a low thermal load. No further action is required

    No  : GO to  D5.

  5. D5: VISUAL TEST 5 CHECK DUAL MASS FLYWHEEL FOR CRACKS 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: Cracks on the face can cause loss of the dual mass flywheels operational reliability.
    1. Inspect the face of the dual mass flywheel for cracks
    G13900678Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Are there cracks on the face of the dual mass flywheel

    Yes  : This indicates a very high thermal load. Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D6.

  6. D6: VISUAL TEST 6 CHECK DUAL MASS FLYWHEEL BALL BEARING 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: Insufficient bearing lubrication will cause the dual mass flywheel to fail.
    1. Inspect the dual mass flywheel ball bearing for grease egress, seized bearing sealing cap missing or brown discoloration due to thermal overload
    G13900654Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is there evidence of any of the listed faults?

    Yes  : This indicates a thermal overload or mechanical damage. Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D7.

  7. D7: VISUAL TEST 7 CHECK DUAL MASS FLYWHEEL PLAIN BEARING 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    1. Inspect the dual mass flywheel plain bearing for wear or damage
    G13900655Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is the bearing worn or damaged?

    Yes  : Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D8.

  8. D8: VISUAL TEST 8 CHECK DUAL MASS FLYWHEEL RADIAL BEARING CLEARANCE 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: The maximum radial bearing clearance for a new part is 0.04 mm with an admissible increase throughout its service life up to 0.17 mm.
    1. Check the radial bearing clearance
    G13900656Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is the radial bearing clearance above 0.17 mm?

    Yes  : Install a new dual mass flywheel and clutch assembly

    No  : GO to  D9.

  9. D9: VISUAL TEST 9 CHECK DUAL MASS FLYWHEEL FRICTION DISC 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    1. Inspect the dual mass flywheel for any evidence of a melted friction control disc
    G13900657Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is there any evidence of a melted friction control disc?

    Yes  : This indicates a high thermal load. Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D10.

  10. D10: VISUAL TEST 10 CHECK DUAL MASS FLYWHEEL FOR SCORING 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: Scoring on the primary mass flywheel can be caused by wear of the plain bearing friction ring causing noise emission.
    1. Inspect the primary mass of the dual mass flywheel for scores caused by the secondary mass flywheel
    G13900658Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is there evidence of scoring on the primary mass flywheel?

    Yes  : Install a new dual mass flywheel and clutch assembly

    No  : GO to  D11.

  11. D11: VISUAL TEST 11 CHECK DUAL MASS FLYWHEEL RING GEAR 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: Worn teeth on the ring gear can cause noise on engine start.
    1. Inspect the dual mass flywheel ring gear teeth for wear
    G13900659Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Are any of the ring gear teeth worn?

    Yes  : Check the function of the starter motor. Install a new dual mass flywheel and clutch assembly.

    No  : GO to  D12.

  12. D12: VISUAL TEST 12 CHECK DUAL MASS FLYWHEEL FOR GREASE LEAKAGE 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: A small amount of grease egress is allowed. Excessive grease leakage approx 20g/flywheel housing covered with grease.
    1. Inspect the dual mass flywheel for leakage of grease around the openings or seal caps
    G13900660Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is there evidence of excessive grease leakage?

    Yes  : Install a new dual mass flywheel and clutch assembly if the grease leakage is excessive.

    No  : GO to  D13.

  13. D13: VISUAL TEST 13 CHECK DUAL MASS FLYWHEEL BALANCE WEIGHTS 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty.
    • The image is for reference only and is not the vehicle specific dual mass flywheel.
    NOTE: If the dual mass flywheel is out of balance a loud humming noise can be heard
    1. Inspect the dual mass flywheel balance weights
    G13900661Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Are the dual mass flywheel balance weights loose or missing? (Indicated by clearly visible welding spots)

    Yes  : The dual mass flywheel is out of balance. Install a new dual mass flywheel and clutch assembly

    No  : GO to  D14.

  14. D14: VISUAL TEST 14 CHECK DUAL MASS FLYWHEEL SECONDARY FLYWHEEL 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty
    • The image is for reference only and is not the vehicle specific dual mass flywheel
    G13900662Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC
    1. Inspect the secondary flywheel

    Is the entire secondary flywheel discolored blue/purple or are cracks visible?

    Yes  : This indicates a very high thermal load. Install a new dual mass flywheel

    No  : GO to  D15.

  15. D15: VISUAL TEST 15 CHECK DUAL MASS FLYWHEEL SECONDARY FLYWHEEL 
    NOTE:
    • Dual mass flywheels cannot be refaced.
    • Dual mass flywheel heat damage is not claimable under warranty
    • The image is for reference only and is not the vehicle specific dual mass flywheel
    1. Inspect the secondary flywheel
    G13900663Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is the friction surface discolored blue and  the flywheel tarnished at the outer edge or in the rivet area?

    Yes  : This indicates a high thermal load. The dual mass flywheel may become defective.

    No  : GO to  D16.

  16. D16: VISUAL TEST 16 CHECK DUAL MASS FLYWHEEL SECONDARY FLYWHEEL 
    NOTE: The image is for reference only and is not the vehicle specific dual mass flywheel
    1. Inspect the secondary flywheel
    G13900664Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is the friction surface discolored blue, with no discoloration at the outer edge or in the rivet area?

    Yes  : This indicates a moderate thermal load.

    No  : GO to  D17.

  17. D17: VISUAL TEST 17 CHECK DUAL MASS FLYWHEEL SECONDARY FLYWHEEL 
    NOTE: The image is for reference only and is not the vehicle specific dual mass flywheel
    1. Inspect the secondary flywheel
    G13900665Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Is the friction surface slightly discolored gold/yellow?

    Yes  : This indicated a low thermal load.

    No  : GO to PINPOINT TEST E .

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