P circle seals have a teflon ring riding on the stem, and it is free to move within a small chamber in the rubber part of the seal. this short stroking action meters oil into the guide. They can be put on almost any engine. The ones with cast in place valve guide bosses must be machined to take the rubber part of the seal. Most with pressed in guides do not need any machining. JimN
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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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