Diy Valve job

I want to add a little more free advice. When you go to look at a valve grinder, take a good, preferably new quality valve with you. Take a dial indicator and stand, chuck the valve in and use the dial indicator to check run out. If it has a lot remove the collet or balls, and clean them then recheck. You can get by with .001-002 ,but I prefer less. Also, you may want to take a marker to mark the high spot in the run out and rotate the valve in the chuck so you know whether most of the run out is in the chuck or the valve itself. Even new valves have some.