Eventually got some plastiguage from manufacturers, pictures couple of main crank journals , and the two most abused rod journals, shows a basic ball park measurements of bearings wear /conditions .. to compare against bmw bearings chart in previous post. . My measurements with basic micrometer shows a slight difference to bmw spec , Will recheck with a better mic Just to check crank spec again. These are the worn bearings. So new should but them back to spec.
Number one main crank shell seems to pull the most wear , about 0.055 mm possibly as it pulls timingchain / oil pump, .... Conrod bearing clearance. Should be between 0.030. And 0.070 mm on spec sheet,Below 0.030 is to tight bmw recommendation would be to fit another set of new shells .(... Update... ) bmw now, say min 0.040 shell bearing clearance, After that new Conrods