The two massive troubles about the RB30 relate on the oiling process and crank collar. This isn’t particular to only the RB30 sequence, given that the RB20/twenty five/26 also have observed troubles Together with the oil pump and oiling devices. All of them are afflicted with this situation (early RB26 https://miloyhmpr.is-blog.com/34510853/the-rb26-engine-for-sale-diaries