Valve Seat Correction Angles
If valve seat width is too wide after grinding valve seat, use a 60-degree angle stone to remove stock from bottom of the seat (to raise seat) or a 30-degree stone to remove stock from top of the seat (to lower seat).
If valve seat width is too wide after grinding valve seat, use a 60-degree angle stone to remove stock from bottom of the seat (to raise seat) or a 30-degree stone to remove stock from top of the seat (to lower seat).