I'm in the process of rebuilding a Continental Z145. I just removed the sleeves and I see a lot of corrosion on the bottom journal where the oil rings seat. I think I would have to hone the surfaces to remove the scale and still I don't know if there will be enough good contact area for the new O rings to do there job. The width of the contact area it not much more than would be required for the new O rings. Before I took it apart, there was no coolant in the oil which is good. The old O rings were very bad and basically fell apart when I removed the sleeves. Also good because maybe it won't leak with new O rings. I took it apart because of low compression and black exhaust. I'm hoping the block is still usable but I don't have the experience to make the call on this.
Is it possible to machine the journals and install oversized sleeves and pistons?
Is it possible to machine the journals and install oversized sleeves and pistons?