CYLINDER HEAD REPAIR

PROCEDURE


  1. REPAIR VALVE SEAT

    Note


    • Repair the valve seat while checking the valve seating position.

    • Keep the lip free from foreign matter.

    • Release the cutter pressure gradually to make the valve seat face smooth.


    1. A00YOYN

      Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification.

    2. A00YMLHN05

      Using 30° and 75° cutters, correct the valve seat so that the valve contacts the entire circumference of the valve seat. The contact should be in the center of the valve seat, and the valve seat width should be maintained within the specified range around the entire circumference of the valve seat.

      Standard Valve Seat Width
      1.0 to 1.4 mm (0.0394 to 0.0551 in.)

    3. Hand lap the valve and valve seat with an abrasive compound.

    4. Check the valve seating position.