Had a young mechanic doing a valve job on a 560 gas one time. He drove out the guides and mushroomed the driver so it made some of the bores in head larger. We reamed it out and found larger O.D. guides and put them in. Often wondered what the next guy would think when he came across this head. Far as valve seals, I am a real believer in them even on these old engines. What happens is as the rocker arm bushing and shaft wear a lot more oil is thrown on the valves and there fore you can get that smoking situation when you first start up. May not change overall oil consumption or then again it may. IH had two suppliers of rocker arms for the 4 and 560 gas engines.. The companny all of a sudden had some realy smokers , oil burners. Co. found out that one supplier was not pinching the oil groove on top of rocker arm down so valves were flooded with oil. Amazing how much oil can go through a guide even when they are new. Had to pull head to clean up all the carbon, If I remember correctly, I pinched the oil groove to specs, installed perfect circle valve seals and that tractor was fine for many, many years.
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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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