| 31. | The top model was a 148cc four-stroke engine with the company's own overhead valve engine.
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| 32. | The overhead valves are pushed by rockers and pushrods.
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| 33. | In 1920 Saxon introduced a new model with a 4-cylinder, 45 hp, overhead valve engine.
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| 34. | Pontiac also introduced its 151 cubic inch " Iron Duke " 4-cylinder overhead valve engine.
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| 35. | The straight-six was a four main bearing 12 overhead valve design with a short stroke.
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| 36. | The overhead valve straight-six engine had a cast iron block and an aluminium cylinder head.
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| 37. | The engines were overhead valve iron-blocks, for gasoline use.
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| 38. | Later versions used 4DR5 and 4DR6 ( J23 turbo ) 2.7 liter overhead valve diesel engines.
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| 39. | Every cylinder head has four overhead valves, which are activated by tappets, pushrods and rocker arms.
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| 40. | It was superseded by the 23-60 which had an overhead valve engine and four wheel brakes.
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