It's your call whether to replace them or not. As I said, I'm not sure just how much if any of them might be normally visible.
If you do replace them, be sure to get all of the old ones and anything else cleaned out of the groove where they rest. The inside of that groove is rough (rougher than you would think for something they put so much emphasis on having clean) but it sounds like you're doing a through job of cleaning out the motor. A pick, a strong light and a mirror to slip into the hole to chekck things out would be in order.
Arguing against changing them out are a) the assumption that they are not leaking, b) it may be they look completely normal, and c) if the bores of the sleeves are out of round any, you might have more problems if you put the sleeves back with the egg oriented differently. If you want to replace them anyway while you are in there (not a bad idea), C can be overcome by scoring a light index mark for each sleeve in the top edge of the sleeve and onto the top of the block so that they are lined up as they were if you reuse them.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I�m handing him tools and he says, "give me that..." and I�ve already got it in his hand or "hand me that....."and I�ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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