Main and Rod Bearing Set +0.25mm Audi A6 A7 Q7 S4 S5 SQ5 3.0L EA839 06M198421

Internal engine bearing wear in high-performance Audi EA839 3.0T V6 engines is often the result of oil film breakdown or extreme thermal stress, leading to scoring on the crankshaft journals. When a crankshaft requires professional machining to remove these imperfections, standard-sized bearings can no longer maintain the critical oil clearances required for a turbocharged engine. This +0.25mm (+0.010in) oversized main and rod bearing set is specifically engineered to accommodate a ground crankshaft, restoring factory-spec oil pressure and bottom-end stability. Manufactured with advanced multi-layer materials, these bearings provide superior fatigue resistance, ensuring a reliable engine rebuild and preventing future metal-to-metal contact or catastrophic failure.