There exists a prevalent oiling difficulty Along with the pre-1992 R32 RB26 motors, given that the surface exactly where the crankshaft meets the oil pump was machined too little, at some point leading to oil pump failure at high rpm. This issue was fixed in afterwards versions on the RB26 https://arthurhtpad.azzablog.com/31302263/considerations-to-know-about-nissan-skyline-rb26-engine