In high school chemistry we took a small piece of sodium the size of a pea with a forceps (do not touch it with your fingers the moisture in your sweat will set it off) and dropped it in a beaker of water. It blew the beaker to hell. Only a fool would grind a sodium cooled valve in a valve grinder especially if the grinder had water solluable oil for a coolant. I often thought that a chunk of sodium the size of a softball would work great for lake fishing.

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1983 300-D turbo
1985 300-D turbo
1959 Harley Panhead chopper
1929 Ford coupe restored
I hang out with Boneheaddoctor at Schuman Automotive OBK#5
All liberals are mattoids but not all mattoids are liberal.