Description

The 3802071 (0.25 mm) main bearing set is a precision-engineered undersize bearing set designed for diesel engines that have undergone crankshaft machining or journal regrinding. When the crankshaft has been machined undersize by 0.25 mm , this bearing set restores correct lubrication clearance, crankshaft stability, and long-term engine protection. Manufactured using a high-strength tri-metal alloy composition, the 3802071 bearings offer excellent fatigue strength, heat resistance, and wear protection—ensuring reliable performance under heavy load and high-temperature diesel operating conditions. Replacing worn main bearings with this 0.25 mm undersized set helps eliminate low oil pressure, bearing knock, vibration, and premature crankshaft wear. Ideal for complete engine rebuilds, machine shop repairs, and in-frame overhauls, this bearing set delivers OEM-level fit, function, and long-lasting durability. ✔ Key Features & Technical Advantages OEM-spec 3802071 0.25 mm undersize main bearing set Designed for crankshafts machined undersize by 0.25 mm Restores correct oil clearance and crankshaft alignment Reduces friction, heat buildup, and internal component wear High-strength tri-metal alloy construction for extended service life Prevents low oil pressure, bearing knock, and crankshaft scoring Ideal for professional rebuilds, machining repairs, and diesel engine overhauls