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Lion Yard Trading
Mercedes-Benz · Engine

Crankshaft main bearings

The shell bearings the crankshaft turns in, along the length of the block.

How you know it is this

  • Low oil pressure at idle when hot
  • A deep rumble rather than a sharp knock
  • Metal in the oil

Worth knowing before you buy

  • Low hot idle pressure is the classic sign, and it is worth confirming with a mechanical gauge rather than the dash light.
  • Sized to the crank, so the crank is measured first.
  • Main bearing wear and big-end wear usually arrive together.

What we need to quote it. The engine code and the crank size. 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

Crankshaft main bearings 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)