I have overhauled several 5.9 Cummins in the late CIH tractors. Two had over 12,000 hours on them. I have yet to see one that needed bored. It seems that the bores must be hard or something. I measured them real well and they have been in tolerance. I would worry more about the cost of overhauling a Case 504. I have seen several of them with bad blocks where the sleeves have worn the block.
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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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