BMW has been known to produce some of the greatest naturally aspirated motors available to the community. Many of the BMW M motors were high revving, higher compression, known for their consistent power output and linear power band. These high performing motors do need a some upkeep to assure long term reliance of the powertrain.
The connecting rod bearings are one of the weaker links in the motor that require preventive replacement for increased reliability. It is much more ideal to tackle this project prior to failure. Once a rod bearing fails and spins, it can compromise the crank or even the whole motor!
We have done full rod bearing replacements on the BMW S54B32, S62B50, S65B40, and S85B50. From our many years of experience with these engines, we have culminated proven comprehensive packages to address this underlying issue.