[SEL] Making valves

[R and E Freeman]

I am working on a Cooper/Stover KA at present. I pulled out the exhaust valve tonight and found it almost completely eroded through the stem near the valve head. I thought I might machine a new one up. What steel should I use and what is the best way to go about it? I thought that it would be easy to machine the whole valve out of a single piece but I know some weld the head onto a stem.Its only a small valve. 5/16 stem,1.4 inch  head and around 4.3 over all

Ray Freeman

Portable Line Boring
http://www.plb.iinet.net.au
plb at plb.iinet.net.au