Cylinder Sleeve (4.020x4.303x6.312)

The MELLING Cylinder Sleeve (4.020x4.303x6.312) is a precision cast iron sleeve engineered for engine block reconditioning and restoration applications. Part number 590295, this sleeve restores worn cylinder bores to original specifications, enabling reliable performance without full block replacement. The 4.020-inch bore accommodates standard piston fitment while maintaining the dimensional integrity required for proper ring sealing and oil control.

Key specifications define this sleeve's application range. The 6.312-inch height and 4.303-inch outer diameter provide sufficient material for secure honing and installation into compatible blocks. The 0.125-inch wall thickness distributes heat effectively and resists distortion under sustained operating temperatures. Cast iron construction delivers proven durability and machinability—critical properties for engine builders seeking reliable cylinder geometry and longevity across diverse duty cycles. The universal fitment design enables use across multiple engine platforms requiring this bore and height combination.

This sleeve serves engine machine shops, performance rebuilders, and restoration specialists restoring vintage or worn powerplants. Whether addressing scored cylinder walls from extended service, preparing an engine for upgraded pistons and rings, or executing a comprehensive bottom-end refresh, the MELLING 590295 provides the precision bore geometry required for proper combustion sealing and crankcase compression. Weighing 3.22 pounds, this single sleeve integrates seamlessly into full cylinder sleeve kits or selective bore restoration projects where targeted sleeve replacement is preferred over complete block replacement.