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About our products: Cylinder liners

Cylinder liners are made of special gray, ductile and alloyed cast iron.

Due to state-of-the-art equipment and technologies the products have high corrosion resistance, geometric accuracy, optimal oil absorption of the surface and strength.

Cylinder liner types
Dry cylinder liners. Finished (honed) Cylinder liner casting

The working surface is honed. The liner does not require additional machining and is ready for use right after installation in the cylinder block. The liner is inserted into the cylinder block and removed from it with a little effort. The fit type is a transition fit (with minimum clearance). The liner can be removed and reinstalled with suitable tools and the cylinder block does not need to be removed from the vehicle.

The semi-finished liner — requires additional machining, using special equipment after installation in the cylinder block. The liner is inserted into the cylinder block with significant effort — the fit type is a pressfit. The liner can be removed and reinstalled industrially only after the cylinder block is removed from the vehicle and completely disassembled.

It serves for the cylinder block recovery when the finished or semi-finished liner is missing. It allows the cylinder block linering of all engines of passenger cars, light and medium commercial vehicles. After machining the casting becomes a dry liner.

Wet cylinder liner Wet cylinder liner with fire ring Cylinder for air-cooled engines

The liner is ready for installation and use. It is inserted into the cylinder block with little effort. Special equipment is not needed to replace the cylinder liner. When necessary it is possible to remove and install the liner if the engine is not removed from the vehicle.

Note: If worn or damaged, the liner counterbore can be machined in the cylinder block and a repair liner with an oversized flange can be installed. For some engines repair liners are produced with different oversized flanges. They are machined in the cylinder block when it is removed from the vehicle.

It is a liner with a fire ring (gome removal ring) in the top end recess. The fire ring serves for scraping of carbon deposits from the piston top land when the piston passes through the top dead centre. This improves the engine ecological parameters.

It is a finished cylinder. It is possible to remove and install it if the engine is not removed from the vehicle.

The Motordetal cylinder liner production

All the cylinder liners for liquid-cooled engines are manufactured by centrifugal casting. For this reason the material structure of higher quality is ensured and heavy impurities are removed. Mechanical properties of the metal are distributed uniformly across the entire part.

For increase of the mechanical properties the liners are heat treated.

For wear and corrosion resistance the cylinder liner surface is phosphated.

The cylinder liners are produced using different types of special gray cast iron with alloying elements: Mn (manganese), Ni (nickel), Cu (copper), Si (silicon), Cr (chromium), Mo (molybdenum), etc.

Applied alloying elements
Increases hardness, strength, wear resistance.
Increases hardness without influence on machinability.
Increases wear resistance.
Increases cast iron machinability.
Improves mechanical properties of the cast iron and increases its wear resistance.
Nickel ensures uniform material hardness across the entire casting.
Copper has similar properties as nickel. The cast iron with a high percentage of copper have high
hardness, required viscosity and good machinability.
Gives the cast iron a  fine-grain structure, hardening its metallic base.
Increases the cast iron strength, reducing its fragility.
Improves the casting structure and mechanical properties, hardening the cast iron metallic base.
Being a good deoxidizer, titanium makes the cast iron free from blow-holes and harmful impurities.
Improves the cast iron liquidity, ensuring a uniform casting structure.
Reduces the casting shrinkage when cooling
Increases hardness

The plateau honing is smooth plateaus alternated with valleys. The plateaus provide compression and the valleys retain oil. The plateau honing allows quick running in of the engine cylinders and piston rings. As a result it prolongs the engine life and ensures its stability.

Cylinder liner markings