The 2 significant difficulties to the RB30 relate towards the oiling technique and crank collar. This isn’t distinct to simply the RB30 collection, given that the RB20/twenty five/26 also have observed problems Together with the oil pump and oiling methods. All of them suffer from this situation (early RB26 only). https://garrettmprom.blogolize.com/everything-about-buy-rb26-engine-67706698