CYLINDER HEAD REPAIR

PROCEDURE

  1. REPAIR INTAKE VALVE SEAT

    Note:

    • Repair the valve seat while checking the seating position.

    • Keep the lip free from foreign matter.

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

    1. A324489C01

      *a

      Cutter

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

    2. A324490C01

      *a

      Valve Seat Contact

      Using 30° and 70° cutters, resurface 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 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.

  2. REPAIR EXHAUST VALVE SEAT

    Note:

    • Repair the valve seat while checking the seating position.

    • Keep the lip free from foreign matter.

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

    1. A322050C01

      *a

      Cutter

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

    2. A324491C01

      *a

      Valve Seat Contact

      Using 20° and 75° cutters, resurface 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 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.