The two big challenges about the RB30 relate for the oiling method and crank collar. This isn’t unique to simply the RB30 series, given that the RB20/twenty five/26 even have famous issues with the oil pump and oiling devices. They all suffer from this issue (early RB26 only). The RB25 https://r33-rb26dett-engine-for-s35622.livebloggs.com/34399715/how-nissan-skyline-rb26-engine-can-save-you-time-stress-and-money