CYLINDER HEAD REPAIR

PROCEDURE


  1. REPAIR INTAKE VALVE SEAT

    Note


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

    • Release the cutter gradually to make the intake valve seat smooth.


    1. A01R5UZ

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

    2. A01R3D3C16
      *a Width

      Using 30° and 60° cutters, correct the valve seat so that the valve contacts the entire circumference of the 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 seat.

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

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

    4. Check the intake valve seating position.

  2. REPAIR EXHAUST VALVE SEAT

    Note


    • Repair the exhaust valve while checking the seating position.

    • Release the cutter gradually to make the exhaust valve seat smooth.


    1. A01R64F

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

    2. A01R58UC02
      *a Width

      Using 30° and 75° cutters, correct the valve seat so that the valve contacts the entire circumference of the 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 seat.

      Standard Width
      1.2 to 1.6 mm (0.0472 to 0.0630 in.)

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

    4. Check the exhaust valve seating position.