Valve in Head and I engines and Over Head Valve engines are the same thing. F head has exhaust in the block and intake in the head. Flat head engines (or side Valve have all valves in the block, T head has intake on one side and exhaust on the other but in the block. Single OHC has valves in the head and the cam. DOHC has 2 cams in the head and all the valves as well. There are other exotic and mundane designs like valves operating sideways, and sleeve valve engines. Jim
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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