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Vibration Damper or Crankshaft Damper

Posted in Maintenance, Technical

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CARS:

  • X5 3lt diesel
  • 320d & 330d (E46 & E90 )
  • Mini

WHAT IT LOOKS LIKE:

Belt fits into it.

Damper splits

SYMPTOMS OF FAILURE:

  • Intermittent yet severe Vibration at low speeds
  • Damper starts to delaminate
  • Belts jump off; steering gets stiff, battery and coolant lights comes on

HOW IT WORKS:

The name is self explanatory. “Vibration damper” is exactly what it does. It dampens or absorbs the torsional vibrations (normal vibrations) caused from the crankshaft. Every time a cylinder fires up the crank rotates; causing all sorts of very technical vibrations which I won’t get into here. The simple solution to this magnitude of force is mounting a big rubber damper or pulley onto the front part of the crank.

X3 and X5 – usually between 120000km and 150000km

E90 between 100000km – 140000km