1100 02 004 0.20 mm Piston & Liner Shim

What does a piston and liner shim do?

This piston and liner shim is a critical component used to bring liner protrusion in heavy-duty diesel engines into the required target range. By being fitted onto a clean seating surface, it allows the cylinder head gasket to maintain a balanced clamping load, which is essential for preventing gas leaks and repetitive gasket failures during engine operation.

Engine compatibility and application

These components are utilized in various heavy commercial vehicle engines where precise clearance is required during an overhaul or liner replacement. This specific 0.20 mm thickness variant is engineered to meet the rigorous demands of high-temperature and high-pressure environments found in heavy-duty engine blocks.

Installation and maintenance guidance

For successful installation, workshop technicians should ensure all surfaces are thoroughly cleaned of residue or scale before fitting. It is vital to measure each cylinder individually, as block wear varies, and to always use a single shim of the correct thickness rather than stacking multiple thin layers. For exact torque values and specific clearance requirements, always consult the vehicle manufacturer's service manual.

Troubleshooting and selection

Proper maintenance involves inspecting the shim for any signs of deformation or burrs before assembly to ensure accurate protrusion readings.