Tom, I hope that's correct, to my knowledge the seals are the original O ring type, no mention that the seals were of another type when the engine was rebuilt. I'll put some oil in the stem washers and see how long it takes for the oil to leak down past the collets. I'm not worried about the situation, so no big rush to solve the problem during the driving season, I'll wait until she's put to bed for the winter and replace them. Thanks for your comment. PJ