This is in regards to a BMW 4 cyl, turbo, B46 engine from a 2018 430i, 156k miles. Came in running; smoking and running poorly. Broke it down and noted lots of liquid/oily buildup in #4 cylinder. Went through head and replaced cylinder head and unfortunately the cylinder is filling up with oil oil again. Question is could an aluminum engine/block that has been run hot lose the seal at the rings? Prior to removing the head I removed the injectors and spun engine over by hand and it blew a stream of oil out of the cylinder. The head gasket was intact and not damaged when I pulled it off. I've got the crank locked at TDC but can and will roll it over if need be to inspect the cyl walls. I'm starting to look for a good, used, low mileage engine.

Is it feasible that rings could be bad enough that it would fill cylinder up with oil?

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Jim