CYLINDER HEAD REPAIR

CAUTION / NOTICE / HINT

Tech Tips


  • Use the same procedure for the Bank 2 side and Bank 1 side.

  • The following procedure is for the Bank 1 side.

PROCEDURE


  1. REPAIR NO. 2 INTAKE VALVE SEAT

    Note


    • Repair the No. 2 intake valve seat while checking the seating position.

    • Release the cutter gradually to make the No. 2 intake valve seat smooth.


    1. A01QCJH

      Using a 45° cutter, resurface the No. 2 intake valve seat so that the No. 2 intake valve seat width is more than the standard.

    2. A01Q8ZNC03
      *a Standard Width

      Using 30° and 60° cutters, correct the No. 2 intake valve seat so that the intake valve contacts the entire circumference of the No. 2 intake valve seat.

      The contact should be in the center of the No. 2 intake valve seat, and the No. 2 intake valve seat width should be as specified around the entire circumference of the No. 2 intake valve seat.

      Standard Width
      1.1 to 1.5 mm (0.0433 to 0.0591 in.)

    3. Hand lap the intake valve and No. 2 intake valve seat with an abrasive compound.

    4. Check the intake valve seating position.

  2. REPAIR NO. 2 EXHAUST VALUE SEAT

    Note


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

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


    1. A01QA04

      Using a 45° cutter, resurface the No. 2 exhaust valve seat so that the No. 2 exhaust valve seat width is more than the standard.

    2. A01QCBXC30
      *a Standard Width

      Using 30° and 75° cutters, correct the No. 2 exhaust valve seat so that the exhaust valve contacts the entire circumference of the No. 2 exhaust valve seat.

      The contact should be in the center of the No. 2 exhaust valve seat, and the No. 2 exhaust valve seat width should be as specified around the entire circumference of the No. 2 exhaust valve seat.

      Standard Width
      1.3 to 1.7 mm (0.0512 to 0.0669 in.)

    3. Hand lap the exhaust valve and No. 2 exhaust valve seat with an abrasive compound.

    4. Check the exhaust valve seating position.