Replacement Cylinder Sleeve 4.0310 Bore Dia.

The MELLING Replacement Cylinder Sleeve with 4.0310-inch bore diameter (Part No. CSL1154) is a precision-engineered cast iron component engineered 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 multiple vehicle platforms without the expense of full block replacement.

The 4.221-inch outer diameter and 6.375-inch height provide precise fitment for standard engine block configurations, while the 0.094-inch wall thickness delivers the structural integrity required to withstand peak combustion pressures and thermal cycling. 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. The 4.031-inch bore diameter accommodates standard piston and ring specifications for compatible engine platforms.

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. MELLING cylinder sleeves are OEM-equivalent components used by professional rebuilders, fleet maintenance operations, and restoration shops where accuracy and durability cannot be compromised.

Proper installation requires precision honing and alignment to ensure concentricity with the block. The sleeve should be pressed or fitted into the bore using manufacturer-specified procedures, followed by final honing to achieve the desired finish and piston clearance for your specific engine application.