Crankshaft Main Bearing Set (STD) for Nissan Pickup D21 SD23 / SD25 (1986-1988)

High-performance Crankshaft Main Bearing Set specifically engineered for Nissan Pickup D21 models equipped with SD23 (2.3L) and SD25 (2.5L) diesel engines manufactured between 1986 and 1988. These are Standard (STD) size bearings, designed to provide superior load-carrying capacity and exceptional fatigue resistance for the crankshaft. Manufactured from premium multi-layer alloy to ensure optimal oil film thickness and minimal friction under heavy-duty commercial conditions. Precision-made to meet or exceed OEM specifications, these bearings are essential for maintaining correct oil pressure and ensuring the long-term structural integrity of the SD engine's bottom end.