REMOVAL & INSTALLATION
- Check valve seat contact width, condition of seat contact, scores, dents, etc.
- Check the amount of valve seat depression (from lower face of cylinder head to valve face) using a depth gauge with a valve fitted into cylinder head.
- Arc-weld excess metal around inner face of the valve seat insert and allow to cool off a few minutes, then pry off the valve seat insert with screw drivers.
- Press a new valve insert into the bore using a bench press. After installation of the valve seat insert, grind finish the seating face with a seat grinder carefully noting the seating angle, contact width and depression. Lap the valve and seat as the final step.