You had better luck than me. My W9 had a loud knock when I bought it. #4 valve was running a 3/8" gap. Set it to spec and I suddenly had a dead cylinder, but no noise. Had to be 3/8" to run. Rockers, pushrods, tappets, rocker shaft all OK. Pulled the head and all the valves were perfect, near new in fact. Pulled it into the shop for some rear end work and pulled the camshaft. While I couldn't tell if it was bent, it was obviously damaged directly adjacent to #4 lobe. Looks like something got wedged in. Had a replacement cam on hand and swapped it out.
Should have had the spare cam ground to 650 gasser specs! But I did find out the engine has high-dome pistons.
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Today's Featured Article - Antique Tractor Wiring Basics - by Curtis von Fange. One of the most neglected parts of old tractors is the wiring. After sitting in the elements for half a century or more much equipment wiring has deteriorated to sparsely covered strands of copper or other metal. Plastic insulation has cracked, mice have eaten through the older clothed style coverings and the exposed wires have reacted to winter moisture and salts by turning blue and powdery. Terminal ends have corroded, rusted or just plain evaporated away. Aged wires not only keep an engin
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