Description

Diesel Engine Piston 3901400 The 3901400 Diesel Engine Piston is a precision-engineered replacement piston designed to meet or exceed OEM performance standards for Cummins diesel engines . This piston is a direct replacement for Cummins OE part number 3802756 , ensuring correct fitment, reliable combustion, and long-term durability in demanding diesel applications. Manufactured from high-strength alloy materials, the 3901400 piston is built to withstand high combustion pressures and elevated operating temperatures common in heavy-duty diesel engines. Its optimized piston crown supports efficient combustion, while the precision-machined skirt profile helps control thermal expansion and reduce friction against the cylinder liner. This piston is ideal for engine overhauls, in-frame rebuilds, and piston replacement where OEM-equivalent quality and performance are required. When installed with the correct piston rings, wrist pin, and liner, it helps restore factory compression, reduce blow-by, and improve overall engine efficiency. The 3901400 diesel piston is commonly used in commercial trucks, industrial equipment, agricultural machinery, and work vehicles , where durability, reliability, and consistent performance are critical.