Replacement Cylinder Sleeve 4.0310 Bore Dia.

The MELLING Replacement Cylinder Sleeve with a 4.0310-inch bore diameter (Part No. CSL1154) is a precision-engineered cast iron component designed for engine block reconditioning and overhaul applications. This universal cylinder sleeve restores worn or damaged cylinder bores to factory specifications, enabling reliable engine rebuilding across various vehicle platforms without the expense of full block replacement.

The sleeve features a 4.221-inch outer diameter and a wall thickness of 0.094 inches, providing the structural integrity required to withstand peak combustion pressures and thermal cycling. Its cast iron construction offers superior heat dissipation and proven longevity in engine service, making this sleeve a trusted choice for professional machine shops and experienced rebuilders who prioritize long-term reliability over quick repairs.

This replacement sleeve is ideal for technicians restoring vintage and modern engines that exhibit bore taper, scoring, or scuff marks that threaten compression integrity. Rather than honing and oversizing pistons—a costly approach that reduces displacement—sleeving restores the original bore size and maintains factory performance characteristics. The 4.031-inch bore diameter accommodates standard piston and ring specifications for compatible engine platforms.