You will find a popular oiling challenge Along with the pre-1992 R32 RB26 motors, as being the area where by the crankshaft satisfies the oil pump was machined far too smaller, finally resulting in oil pump failure at significant rpm. This situation was solved in later versions from the RB26 https://gregorynmfzr.qodsblog.com/31188578/an-unbiased-view-of-nissan-rb26-engine-for-sale