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Lion Yard Trading
Mercedes-Benz · Engine

Valve stem seals

The small rubber seals that stop oil running down the valve stems into the combustion chamber.

How you know it is this

  • A puff of blue smoke on start-up, or after the car has idled at a junction
  • Oil consumption with no external leak and good compression
  • Oily deposits on the plugs

Worth knowing before you buy

  • Blue smoke only on start-up and overrun is the signature. Smoke all the time is more likely rings.
  • They harden with heat and age rather than mileage, so a low-mileage car in this climate is not exempt.
  • On some engines they can be done with the head in place using compressed air. That changes the cost enormously — worth asking.

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.

Cam cover and gasketCamshaft and bearingsRockers and liftersValves, springs and sealsCylinder headHead gasket and boltsManifold and swirl flaps
Cylinder head and valvetrain — schematic, to show where the part sits. Arrangement is right; it is a diagram and not a fitment reference.

Rest of the cylinder head and valvetrain

All engine parts
Get in touch

Valve stem seals 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)