EXAMINE THIS REPORT ON RB26DETT ENGINES FOR SALE

You will find there's typical oiling problem with the pre-1992 R32 RB26 motors, as the surface wherever the crankshaft satisfies the oil pump was machined also smaller, inevitably leading to oil pump failure at significant rpm. This challenge was fixed in later variations from the RB26 which has a wider oil pump drive, that's found in all R33+ RB26