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 - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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