DIY valve seat grinding Grassroots Motorsports forum
Feb 20 2022 · I used to do valve and seat grinds as a kid with an old Sioux machine from a garage in the small town I grew up in The sequence I was taught was to grind the valves first Then cut the 45 on the seat followed by the 30 and 60 cuts to place contact about 1/16 down from the top edge of the valve face