Valve Seat Inspection/Repair
VALVE SEAT INSPECTION/REPAIR1. Measure the seat contact width.
^ If not as specified, resurface the valve seat using a 45° valve seat cutter and/or resurface the valve face.
Standard width
IN: 1.1-1.4 mm (0.043-0.055 in)
EX: 1.4-1.7 mm (0.056-0.066 in)
2. Verify that the valve seating position is at the center of the valve face.
^ If the seating position is too high, correct the valve seat using a 70° cutter, and then 45° cutter.
^ If the seating position is too low, correct the valve seat using 30° cutter, and then 45° cutter.