ACL BMW M20/M50/M52/M54 - 1919CC 80.0mm Bore 66.0mm Stroke .25mm Oversized Conrod Bearing Set

When you're rebuilding or refreshing the engine in your BMW, especially those popular M20, M50, M52, or M54 series engines, getting the right bearings is crucial. This set from ACL is specifically designed to be 0.25mm oversized for the connecting rod journals, meaning they're meant for crankshafts that have been machined down to match this size. This is a common step when dealing with engines that have seen high mileage or are being built for performance, ensuring a fresh, tight fit for optimal oil pressure and reduced wear.

ACL uses a specialized tri-metal material for these bearings, which is known for its strength and ability to handle the pressures and temperatures found in performance BMW engines. The material is well-suited for maintaining oil film integrity, even under demanding conditions. Because these are an oversized bearing, they are intended for use with a crankshaft that has been professionally ground and polished to the correct undersize specification, which in this case is 0.25mm smaller than the original journal diameter. This ensures a proper crush and clearance for the bearing to function correctly.

This set includes the necessary connecting rod bearings for your engine rebuild. Make sure to verify your crankshaft journal size and consult your engine's service manual for the correct installation procedures and torque specifications. Using the correct oversized bearings with a properly machined crankshaft is key to a long-lasting engine build.