QUOTE(Cap'n Krusty @ Sep 18 2010, 11:37 PM)
You own a drill press and a grinder? Here's the trick way. Oh, you'll need a drill press vise, too. Take a deep socket large enough is size to just cover the retainer. Cut out 2 opposite sides with the bench grinder until you have 2 10mm strips left holding the top to the bottom. Keep a can of water nearby to quench the heat you're generating so you won't burn your fingers. Leave about 10mm at the bottom, the same at the top. Set a wrist pin in the vise, set the vise on the table of the drill press. Put an 8mm bolt through the top of the socket, the part where the ratchet would go. Lock it down with a nut. There should be enough bolt to secure in the chuck. Using a similar size socket, give each retainer a sharp whack. Arrange the head in the drill press so the valve head rests on the vertical wrist pin and the tool you've just made rests on the retainer. Depress the retainer by turning the height control mechanism of the spindle until you've fully exposed the keepers. Flick them puppies out with a pocket screwdriver or a pencil magnet. Raise the spindle (OK, the quill, for you anal machinists) and move on to the next valve. The sharp whack has jolted everything loose, and you won't put a dangerous or damaging load on the drill press.
I'm still in the 37th year of the 40 year developmental testing period for this tool, but it looks like it may just work!
Enjoy! The Cap'n
Unfortunately, I do not have a drill press. Well, I do but just one of those small ones. Next on my list is to buy a full size drill press.