This 2008 E90 is a little different than the others that we've documented here. Disassembling some of the lower components on the lift while on our way to performing the rod bearing service, we discovered that there was a crack behind the alternator that was bandaged up. The damage does not appear as though it was from a front end collision, but perhaps an error while that engine was being installed back into the car....not quite sure. Regardless, instead of investing in that engine, he said he would bring us another one.
These are the bearing pulled out of the customer supplied long block, which according to the yard he got it from is a 2008 with 37,xxx miles. The bearings tell a different story. With no scoring done to the crank, we upgraded the rod bearings and did a bunch of maintenance items such as oil filter stand gasket, belts and tensioners, valve cover gaskets, cooling system overhaul, cleaned out the secondary air passages with the manifolds off, and spark plugs.
