Description

The Cummins Steel Crown Piston M-3164-100 (1.00 mm Oversize) is a heavy-duty piston assembly engineered for diesel engines that have been bored 1.00 mm oversize during professional rebuilds. Designed as a direct replacement for OE part number 3802408 , this piston restores correct piston-to-wall clearance, compression stability, and long-term durability in Cummins diesel engines . Steel crown pistons are purpose-built to withstand higher combustion pressures and elevated operating temperatures than conventional aluminum pistons. The steel crown construction improves resistance to thermal fatigue, cracking, and crown deformation, making this piston ideal for heavy-duty, high-load, and continuous-duty applications . The 1.00 mm oversize (OS) specification compensates for cylinder material removed during machining, ensuring proper fitment and stable combustion geometry. Precision-machined ring lands, controlled thermal expansion characteristics, and an optimized skirt profile help reduce friction, maintain piston stability, and extend overall engine service life. The M-3164-100 steel crown piston is commonly installed during engine rebuilds, in-frame overhauls, block reconditioning, and professional remanufacturing projects . When paired with the correct 1.00 mm oversize piston ring set , piston pin, bushings, and retainers, it helps restore factory performance and reliability. Cross-Reference (OEM) Aftermarket Reference: M-3164-100 OEM Reference: 3802408 Size: 1.00 mm Oversize Type: Steel Crown Piston