Valve Seat Correction Angles
If seat and face contact is too close to valve stem, grind seat with a 30-degree stone. If seat and face contact is too close to valve margin, grind seat with a 60-degree stone.
If seat and face contact is too close to valve stem, grind seat with a 30-degree stone. If seat and face contact is too close to valve margin, grind seat with a 60-degree stone.