The two big issues on the RB30 relate to the oiling procedure and crank collar. This isn’t unique to just the RB30 collection, since the RB20/twenty five/26 even have noted concerns Using the oil pump and oiling devices. All of them put up with this situation (early RB26 only). 2:1), https://lanegkiic.blog2learn.com/76403792/the-smart-trick-of-nissan-skyline-rb26-that-no-one-is-discussing