The spacer sleeve K 34130 is a precision-engineered positioning component designed for the cooling insert K 34133 within the operating piston assembly of the Sulzer ZV40/48 engine. Its primary function is to maintain the correct spacing and alignment of the cooling insert, ensuring efficient coolant flow and stable mechanical support under demanding operating conditions. Manufactured from high-strength, corrosion-resistant materials with excellent dimensional stability, the spacer sleeve is engineered to withstand continuous thermal cycling, vibration, and mechanical loading typical of large marine and industrial diesel engines. Precision machining guarantees exact fitment and consistent assembly geometry, helping to prevent misalignment and uneven stress distribution. By maintaining the proper position of the cooling insert, the K 34130 spacer sleeve contributes to improved piston cooling efficiency, enhanced operational reliability, and extended service life of critical engine components.