After 20 years repairing Model T's here are some hints on how to more easily do a valve job to increase engine compression and performance. The higher the engine compression the easier it will be to start
Using the old two piece valves again is tempting fate. They often fail after 90+ years of service and can cause a lot of damage. Do you self a favor and buy a new set of one piece stainless valves for the old gal.
I could not agree more. I have experienced the failure of a two-piece valve such as the one you are showing. The head separated from the stem and it then punched a hole in the piston. Catastrophic engine failure was the result. For another example I bought two used engines out of a barn in Iowa and on dissasembly one of the engines had a two-piece valve that had cracked and a portion of the head was missing. The heads of the two-piece valves are cast iron and brittle. In the model T era, there wasn't a grade of steel that could stand the heat the exhaust valves were exposed to, but cast iron could so the valves have a cast iron head pressed onto a steel stem.
