Replacement Cylinder Sleeve 4.3750 Bore

The Replacement Cylinder Sleeve 4.3750 Bore by Melling is an essential component for engine builders and mechanics performing cylinder reconditioning work. This precision-engineered sleeve addresses worn, scored, or damaged cylinder walls that compromise compression, increase blow-by, and reduce engine efficiency. Whether you're rebuilding a classic engine or repairing industrial equipment, this quality cylinder sleeve restores cylinders to factory specifications without requiring complete engine block replacement.

Melling's replacement cylinder sleeve features a 4.3750-inch bore diameter, designed to precise tolerances that ensure proper piston clearance and ring sealing. The sleeve is honed to match OEM specifications, providing a fresh, corrosion-resistant surface for reliable ring seal and minimal oil consumption. Its 9.5-inch length accommodates standard block depths, ensuring compatibility with a range of engine types.

This sleeve is ideal for any mechanic or engine builder tackling mid-range displacement engines requiring the 4.3750-inch bore specification. Proper sizing prevents future wall degradation and maximizes ring life by eliminating the micro-gaps that develop in worn cylinders. Installation demands precision honing equipment and careful press-fitting to ensure no gaps between the sleeve and the cylinder wall.