Engine Crankshaft Main Bearing Set +0.50mm Audi A6 A7 A8 Q7 Q8 S4 S5 SQ5 3.0L EA839

The main bearings in the Audi 3.0T EA839 engine support the crankshaft and are vital for maintaining stable oil pressure and smooth rotation. When a crankshaft undergoes significant repair due to deep scoring or journal damage, it must be machined to a second undersize. This +0.50mm (+0.020in) oversized main bearing set is engineered specifically to fit a ground crankshaft, restoring the critical oil clearance required for high-performance turbocharged operation. These bearings feature advanced multi-layer construction to handle the high torque and thermal loads of the EA839 V6, ensuring a precise fit and long-term durability during a complete bottom-end engine restoration.