The 2 huge complications within the RB30 relate into the oiling program and crank collar. This isn’t particular to just the RB30 sequence, given that the RB20/25/26 even have famous issues with the oil pump and oiling systems. They all are afflicted by this problem (early RB26 only). I consider https://rb26detforsale88443.blogunteer.com/27737448/not-known-facts-about-rb26dett-complete-engine