So I bought what turned out to be a pretty clean RS 200 . The engine was out of the car when I bought it and I thought I might as well start a thread on the rebuild . On assessing the parts it would seem that the motor ran bearings and the bores are on the max limit of their tolerance . I am busy trying to find a better block . I looked at two today , but they were both worse than the block I have . One was a turbo Meg block the other a Scienic . Am I correct in saying that if I blank off the turbo oil feed and return I could use a Meg block ? I have started cleaning and Vaquablasting some of the engine parts plus the engine bay is getting a good clean .