I would lean toward the Lifter being the source of any "valve-Noise"...from, being full of dirt, from being in the rear of an "In-line" engine, wear from worn rocker-arms (many were aluminum alloy) and wear at the lifter/rocker/cam .. I have witnessed valves Crashing shut, because a perfectly good engine was so Varnished-up that the Lifters were hanging the valves open..!! That sounded bad (Chevy 327 2-barell) but a tear down revealed NO wear, but extreme deposits under the valve covers AND extreme Varnish on the Lifters..a Very dirty engine.. (Quaker State 10-30 changed EVERY 2,000 mi too).. Had 68,000mi on it.. I would think that probably the only time "Valves" are going to make any noise, is when the engine RPM exceeds the speed that the valve-SPRINGS can return them accurately to their Seats..!! "Floating Valves"...NOT a good thing, with a solid lifter Cam... With Hydraulic Lifters, they just go flat and the engine quits until they can pump back up and take the lash out...!! Sounds bad, but never did seem to cause any damage..
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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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