Last one I did (201), was in a 455. It had gotten overheated. As was stated, with the cavitation issue they have, no machine shop around here will touch it without boring, sleeving each hole, and a final bore. Had that done, had each hole finish honed to match each piston, had the top of the block decked, the crank checked and polished, main cap alignment checked, rods checked and piston pin bushings replaced and honed to fit the pins, and the head surfaced and rebuilt. I double and triple cleaned the block, then installed the cam bearings first and went from there with the reassembly, and reinstallation back into the backhoe. I didn't do the fuel system, as I had already replaced it a year or so earlier. I don't know about a 4500, but a 455 is quite a pain to remove the engine from, after removing the hardcore, then dropping the front end off so the front end casting bolted to the front of the engine can be removed. Once that's off, you can unbolt everything else and remove the engine. How much of this are you planning on doing yourself? The machine work alone cost $1200, which was a pretty good deal. I did ALL of the engine removal, tear down, engine assembly, and reinstall myself. I can't remember for sure, but with all of the new engine parts, piston, rings, rod- main-cam bearings, full gasket set, new head bolts and rod bolts, and other odds and ends I think I had about $750 in parts. They are good engines and will sooner or later cost you a little money, but after that, they'll run another 40 years.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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