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Lion Yard Trading
Mercedes-Benz · Engine

Crank pulley / harmonic balancer

The pulley on the nose of the crankshaft that drives the accessory belt and damps the crankshaft's torsional vibration.

Also called crank pulley, vibration damper.

How you know it is this

  • A wobble visible in the pulley with the engine running
  • The rubber ring between the inner and outer parts of the pulley cracked or displaced
  • Belt squeal or a belt that will not stay aligned
  • A rumble that changes with revs but not with gear

Worth knowing before you buy

  • It is two rings bonded to rubber, not a solid pulley. When the rubber fails the outer ring moves independently and the belt alignment goes with it.
  • A failed damper puts vibration straight into the crank bearings. It is not cosmetic.
  • The centre bolt is usually single-use and very tight.

What we need to quote it. The engine code. The chassis number settles the generation, the body and usually the engine in seventeen characters — it is on your mulkiya. A photograph of the old part helps where there is more than one version.

Piston, rings and pinConnecting rod and shellsCrankshaft and mainsEngine blockCrank pulley / damperFlywheel and ring gearSeals and gasketsSump and gasket
Block and rotating assembly — schematic, to show where the part sits. Arrangement is right; it is a diagram and not a fitment reference.

Rest of the block and rotating assembly

All engine parts
Get in touch

Crank pulley / harmonic balancer for your Mercedes-Benz?

Send the chassis number and a photograph of the old part. We come back with genuine, OEM and aftermarket options priced side by side, with lead times.

Mon–Sat, 8:00 AM – 6:00 PM · +971 54 303 3119 (Operations Director) · +971 54 241 0599 (Managing Director)