Nov 23, 2015· All, Looking for a valve seat cutter 45 degree ( hand type ) like John JDG 507. Where did you find yours? Thanks
Jan 17, 2014· I have always done mine one degree off on the theory that the valve and seat will find their place together; if that makes sense. By cutting at different angles the seat width essentially begins at zero. Then as the engine gets some time on it the seat width will expand to a point and stop.