2400 02 005 0.25 mm Piston & Liner Shim for Engines

What does a piston and liner shim do?

This piston and liner shim is a critical component used to adjust the liner protrusion within heavy-duty diesel engines to the required target range. By providing a precise thickness, it ensures the head gasket receives a balanced clamping load, which is essential for preventing gas leaks and subsequent gasket failures during high-pressure combustion cycles.

Technical specifications and fitment

These shims are designed to maintain their dimensions under extreme conditions, including exposure to oil, coolant, and high operating temperatures. This specific variant features an outside diameter of 119.40 mm and an inside diameter of 112.15 mm, with a thickness of 0.25 mm, making it suitable for specific engine configurations requiring precise clearance adjustments.

Installation and maintenance guidance

For professional installation, ensure all surfaces are thoroughly cleaned of residue or corrosion to prevent false protrusion readings. It is recommended to measure each cylinder individually, as block wear can vary across the engine block. When replacing liners, always verify the required thickness according to the vehicle manufacturer's service manual to ensure optimal sealing.

Ensuring engine seal integrity

Using high-strength components like this shim helps maintain the structural integrity of the combustion chamber seal and prevents repetitive engine overhauls.