Replacement Cylinder Sleeve 4.125 Bore Dia.

The Replacement Cylinder Sleeve 4.125 Bore Dia. from MELLING is a precision engine component engineered for restoring cylinder integrity in automotive and industrial engines. This cast-iron sleeve serves as a critical repair solution when original cylinder walls become worn, scored, or damaged beyond honing limits. Designed as a drop-in replacement, it reinstates proper bore geometry and sealing surfaces, making it essential for rebuilding applications where full block replacement is impractical or cost-prohibitive.

Manufactured from durable cast iron, this cylinder sleeve features a 4.125-inch bore diameter with a 4.378-inch outside diameter and 0.125-inch wall thickness, dimensions that ensure robust load distribution and thermal stability during engine operation. The 6.250-inch height accommodates standard block depths while the universal design allows fitment across multiple engine platforms without custom modifications. The iron construction provides excellent wear resistance and compatibility with modern piston ring materials, critical for maintaining compression and blowby control over extended service intervals.

Engine builders, machine shops, and fleet maintenance operations rely on MELLING cylinder sleeves for mid-life engine overhauls and performance rebuilds. Proper installation requires careful bore honing and press-fitting to specification, ensuring concentricity and preventing coolant or oil leakage. This sleeve is ideal for engines experiencing bore wear in the 4.125-inch range, from light-duty automotive applications to higher-displacement industrial powerplants. At 3.24 lbs per unit, it ships efficiently for rapid project turnaround.